1275 lines
48 KiB
Java
1275 lines
48 KiB
Java
/*
|
|
* Licensed to the Apache Software Foundation (ASF) under one or more
|
|
* contributor license agreements. See the NOTICE file distributed with
|
|
* this work for additional information regarding copyright ownership.
|
|
* The ASF licenses this file to You under the Apache License, Version 2.0
|
|
* (the "License"); you may not use this file except in compliance with
|
|
* the License. You may obtain a copy of the License at
|
|
*
|
|
* http://www.apache.org/licenses/LICENSE-2.0
|
|
*
|
|
* Unless required by applicable law or agreed to in writing, software
|
|
* distributed under the License is distributed on an "AS IS" BASIS,
|
|
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
|
|
* See the License for the specific language governing permissions and
|
|
* limitations under the License.
|
|
*/
|
|
package org.apache.commons.io;
|
|
|
|
import java.io.BufferedInputStream;
|
|
import java.io.BufferedReader;
|
|
import java.io.ByteArrayInputStream;
|
|
import java.io.CharArrayWriter;
|
|
import java.io.File;
|
|
import java.io.IOException;
|
|
import java.io.InputStream;
|
|
import java.io.InputStreamReader;
|
|
import java.io.OutputStream;
|
|
import java.io.OutputStreamWriter;
|
|
import java.io.PrintWriter;
|
|
import java.io.Reader;
|
|
import java.io.StringWriter;
|
|
import java.io.Writer;
|
|
import java.util.ArrayList;
|
|
import java.util.Collection;
|
|
import java.util.Iterator;
|
|
import java.util.List;
|
|
|
|
import org.apache.commons.io.output.ByteArrayOutputStream;
|
|
|
|
/**
|
|
* General IO stream manipulation utilities.
|
|
* <p>
|
|
* This class provides static utility methods for input/output operations.
|
|
* <ul>
|
|
* <li>closeQuietly - these methods close a stream ignoring nulls and exceptions
|
|
* <li>toXxx/read - these methods read data from a stream
|
|
* <li>write - these methods write data to a stream
|
|
* <li>copy - these methods copy all the data from one stream to another
|
|
* <li>contentEquals - these methods compare the content of two streams
|
|
* </ul>
|
|
* <p>
|
|
* The byte-to-char methods and char-to-byte methods involve a conversion step.
|
|
* Two methods are provided in each case, one that uses the platform default
|
|
* encoding and the other which allows you to specify an encoding. You are
|
|
* encouraged to always specify an encoding because relying on the platform
|
|
* default can lead to unexpected results, for example when moving from
|
|
* development to production.
|
|
* <p>
|
|
* All the methods in this class that read a stream are buffered internally.
|
|
* This means that there is no cause to use a <code>BufferedInputStream</code>
|
|
* or <code>BufferedReader</code>. The default buffer size of 4K has been shown
|
|
* to be efficient in tests.
|
|
* <p>
|
|
* Wherever possible, the methods in this class do <em>not</em> flush or close
|
|
* the stream. This is to avoid making non-portable assumptions about the
|
|
* streams' origin and further use. Thus the caller is still responsible for
|
|
* closing streams after use.
|
|
* <p>
|
|
* Origin of code: Excalibur.
|
|
*
|
|
* @author Peter Donald
|
|
* @author Jeff Turner
|
|
* @author Matthew Hawthorne
|
|
* @author Stephen Colebourne
|
|
* @author Gareth Davis
|
|
* @author Ian Springer
|
|
* @author Niall Pemberton
|
|
* @author Sandy McArthur
|
|
* @version $Id: IOUtils.java 481854 2006-12-03 18:30:07Z scolebourne $
|
|
*/
|
|
public class IOUtils {
|
|
// NOTE: This class is focussed on InputStream, OutputStream, Reader and
|
|
// Writer. Each method should take at least one of these as a parameter,
|
|
// or return one of them.
|
|
|
|
/**
|
|
* The Unix directory separator character.
|
|
*/
|
|
public static final char DIR_SEPARATOR_UNIX = '/';
|
|
/**
|
|
* The Windows directory separator character.
|
|
*/
|
|
public static final char DIR_SEPARATOR_WINDOWS = '\\';
|
|
/**
|
|
* The system directory separator character.
|
|
*/
|
|
public static final char DIR_SEPARATOR = File.separatorChar;
|
|
/**
|
|
* The Unix line separator string.
|
|
*/
|
|
public static final String LINE_SEPARATOR_UNIX = "\n";
|
|
/**
|
|
* The Windows line separator string.
|
|
*/
|
|
public static final String LINE_SEPARATOR_WINDOWS = "\r\n";
|
|
/**
|
|
* The system line separator string.
|
|
*/
|
|
public static final String LINE_SEPARATOR;
|
|
static {
|
|
// avoid security issues
|
|
StringWriter buf = new StringWriter(4);
|
|
PrintWriter out = new PrintWriter(buf);
|
|
out.println();
|
|
LINE_SEPARATOR = buf.toString();
|
|
}
|
|
|
|
/**
|
|
* The default buffer size to use.
|
|
*/
|
|
private static final int DEFAULT_BUFFER_SIZE = 1024 * 4;
|
|
|
|
/**
|
|
* Instances should NOT be constructed in standard programming.
|
|
*/
|
|
public IOUtils() {
|
|
super();
|
|
}
|
|
|
|
//-----------------------------------------------------------------------
|
|
/**
|
|
* Unconditionally close an <code>Reader</code>.
|
|
* <p>
|
|
* Equivalent to {@link Reader#close()}, except any exceptions will be ignored.
|
|
* This is typically used in finally blocks.
|
|
*
|
|
* @param input the Reader to close, may be null or already closed
|
|
*/
|
|
public static void closeQuietly(Reader input) {
|
|
try {
|
|
if (input != null) {
|
|
input.close();
|
|
}
|
|
} catch (IOException ioe) {
|
|
// ignore
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Unconditionally close a <code>Writer</code>.
|
|
* <p>
|
|
* Equivalent to {@link Writer#close()}, except any exceptions will be ignored.
|
|
* This is typically used in finally blocks.
|
|
*
|
|
* @param output the Writer to close, may be null or already closed
|
|
*/
|
|
public static void closeQuietly(Writer output) {
|
|
try {
|
|
if (output != null) {
|
|
output.close();
|
|
}
|
|
} catch (IOException ioe) {
|
|
// ignore
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Unconditionally close an <code>InputStream</code>.
|
|
* <p>
|
|
* Equivalent to {@link InputStream#close()}, except any exceptions will be ignored.
|
|
* This is typically used in finally blocks.
|
|
*
|
|
* @param input the InputStream to close, may be null or already closed
|
|
*/
|
|
public static void closeQuietly(InputStream input) {
|
|
try {
|
|
if (input != null) {
|
|
input.close();
|
|
}
|
|
} catch (IOException ioe) {
|
|
// ignore
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Unconditionally close an <code>OutputStream</code>.
|
|
* <p>
|
|
* Equivalent to {@link OutputStream#close()}, except any exceptions will be ignored.
|
|
* This is typically used in finally blocks.
|
|
*
|
|
* @param output the OutputStream to close, may be null or already closed
|
|
*/
|
|
public static void closeQuietly(OutputStream output) {
|
|
try {
|
|
if (output != null) {
|
|
output.close();
|
|
}
|
|
} catch (IOException ioe) {
|
|
// ignore
|
|
}
|
|
}
|
|
|
|
// read toByteArray
|
|
//-----------------------------------------------------------------------
|
|
/**
|
|
* Get the contents of an <code>InputStream</code> as a <code>byte[]</code>.
|
|
* <p>
|
|
* This method buffers the input internally, so there is no need to use a
|
|
* <code>BufferedInputStream</code>.
|
|
*
|
|
* @param input the <code>InputStream</code> to read from
|
|
* @return the requested byte array
|
|
* @throws NullPointerException if the input is null
|
|
* @throws IOException if an I/O error occurs
|
|
*/
|
|
public static byte[] toByteArray(InputStream input) throws IOException {
|
|
ByteArrayOutputStream output = new ByteArrayOutputStream();
|
|
copy(input, output);
|
|
return output.toByteArray();
|
|
}
|
|
|
|
/**
|
|
* Get the contents of a <code>Reader</code> as a <code>byte[]</code>
|
|
* using the default character encoding of the platform.
|
|
* <p>
|
|
* This method buffers the input internally, so there is no need to use a
|
|
* <code>BufferedReader</code>.
|
|
*
|
|
* @param input the <code>Reader</code> to read from
|
|
* @return the requested byte array
|
|
* @throws NullPointerException if the input is null
|
|
* @throws IOException if an I/O error occurs
|
|
*/
|
|
public static byte[] toByteArray(Reader input) throws IOException {
|
|
ByteArrayOutputStream output = new ByteArrayOutputStream();
|
|
copy(input, output);
|
|
return output.toByteArray();
|
|
}
|
|
|
|
/**
|
|
* Get the contents of a <code>Reader</code> as a <code>byte[]</code>
|
|
* using the specified character encoding.
|
|
* <p>
|
|
* Character encoding names can be found at
|
|
* <a href="http://www.iana.org/assignments/character-sets">IANA</a>.
|
|
* <p>
|
|
* This method buffers the input internally, so there is no need to use a
|
|
* <code>BufferedReader</code>.
|
|
*
|
|
* @param input the <code>Reader</code> to read from
|
|
* @param encoding the encoding to use, null means platform default
|
|
* @return the requested byte array
|
|
* @throws NullPointerException if the input is null
|
|
* @throws IOException if an I/O error occurs
|
|
* @since Commons IO 1.1
|
|
*/
|
|
public static byte[] toByteArray(Reader input, String encoding)
|
|
throws IOException {
|
|
ByteArrayOutputStream output = new ByteArrayOutputStream();
|
|
copy(input, output, encoding);
|
|
return output.toByteArray();
|
|
}
|
|
|
|
/**
|
|
* Get the contents of a <code>String</code> as a <code>byte[]</code>
|
|
* using the default character encoding of the platform.
|
|
* <p>
|
|
* This is the same as {@link String#getBytes()}.
|
|
*
|
|
* @param input the <code>String</code> to convert
|
|
* @return the requested byte array
|
|
* @throws NullPointerException if the input is null
|
|
* @throws IOException if an I/O error occurs (never occurs)
|
|
* @deprecated Use {@link String#getBytes()}
|
|
*/
|
|
public static byte[] toByteArray(String input) throws IOException {
|
|
return input.getBytes();
|
|
}
|
|
|
|
// read char[]
|
|
//-----------------------------------------------------------------------
|
|
/**
|
|
* Get the contents of an <code>InputStream</code> as a character array
|
|
* using the default character encoding of the platform.
|
|
* <p>
|
|
* This method buffers the input internally, so there is no need to use a
|
|
* <code>BufferedInputStream</code>.
|
|
*
|
|
* @param is the <code>InputStream</code> to read from
|
|
* @return the requested character array
|
|
* @throws NullPointerException if the input is null
|
|
* @throws IOException if an I/O error occurs
|
|
* @since Commons IO 1.1
|
|
*/
|
|
public static char[] toCharArray(InputStream is) throws IOException {
|
|
CharArrayWriter output = new CharArrayWriter();
|
|
copy(is, output);
|
|
return output.toCharArray();
|
|
}
|
|
|
|
/**
|
|
* Get the contents of an <code>InputStream</code> as a character array
|
|
* using the specified character encoding.
|
|
* <p>
|
|
* Character encoding names can be found at
|
|
* <a href="http://www.iana.org/assignments/character-sets">IANA</a>.
|
|
* <p>
|
|
* This method buffers the input internally, so there is no need to use a
|
|
* <code>BufferedInputStream</code>.
|
|
*
|
|
* @param is the <code>InputStream</code> to read from
|
|
* @param encoding the encoding to use, null means platform default
|
|
* @return the requested character array
|
|
* @throws NullPointerException if the input is null
|
|
* @throws IOException if an I/O error occurs
|
|
* @since Commons IO 1.1
|
|
*/
|
|
public static char[] toCharArray(InputStream is, String encoding)
|
|
throws IOException {
|
|
CharArrayWriter output = new CharArrayWriter();
|
|
copy(is, output, encoding);
|
|
return output.toCharArray();
|
|
}
|
|
|
|
/**
|
|
* Get the contents of a <code>Reader</code> as a character array.
|
|
* <p>
|
|
* This method buffers the input internally, so there is no need to use a
|
|
* <code>BufferedReader</code>.
|
|
*
|
|
* @param input the <code>Reader</code> to read from
|
|
* @return the requested character array
|
|
* @throws NullPointerException if the input is null
|
|
* @throws IOException if an I/O error occurs
|
|
* @since Commons IO 1.1
|
|
*/
|
|
public static char[] toCharArray(Reader input) throws IOException {
|
|
CharArrayWriter sw = new CharArrayWriter();
|
|
copy(input, sw);
|
|
return sw.toCharArray();
|
|
}
|
|
|
|
// read toString
|
|
//-----------------------------------------------------------------------
|
|
/**
|
|
* Get the contents of an <code>InputStream</code> as a String
|
|
* using the default character encoding of the platform.
|
|
* <p>
|
|
* This method buffers the input internally, so there is no need to use a
|
|
* <code>BufferedInputStream</code>.
|
|
*
|
|
* @param input the <code>InputStream</code> to read from
|
|
* @return the requested String
|
|
* @throws NullPointerException if the input is null
|
|
* @throws IOException if an I/O error occurs
|
|
*/
|
|
public static String toString(InputStream input) throws IOException {
|
|
StringWriter sw = new StringWriter();
|
|
copy(input, sw);
|
|
return sw.toString();
|
|
}
|
|
|
|
/**
|
|
* Get the contents of an <code>InputStream</code> as a String
|
|
* using the specified character encoding.
|
|
* <p>
|
|
* Character encoding names can be found at
|
|
* <a href="http://www.iana.org/assignments/character-sets">IANA</a>.
|
|
* <p>
|
|
* This method buffers the input internally, so there is no need to use a
|
|
* <code>BufferedInputStream</code>.
|
|
*
|
|
* @param input the <code>InputStream</code> to read from
|
|
* @param encoding the encoding to use, null means platform default
|
|
* @return the requested String
|
|
* @throws NullPointerException if the input is null
|
|
* @throws IOException if an I/O error occurs
|
|
*/
|
|
public static String toString(InputStream input, String encoding)
|
|
throws IOException {
|
|
StringWriter sw = new StringWriter();
|
|
copy(input, sw, encoding);
|
|
return sw.toString();
|
|
}
|
|
|
|
/**
|
|
* Get the contents of a <code>Reader</code> as a String.
|
|
* <p>
|
|
* This method buffers the input internally, so there is no need to use a
|
|
* <code>BufferedReader</code>.
|
|
*
|
|
* @param input the <code>Reader</code> to read from
|
|
* @return the requested String
|
|
* @throws NullPointerException if the input is null
|
|
* @throws IOException if an I/O error occurs
|
|
*/
|
|
public static String toString(Reader input) throws IOException {
|
|
StringWriter sw = new StringWriter();
|
|
copy(input, sw);
|
|
return sw.toString();
|
|
}
|
|
|
|
/**
|
|
* Get the contents of a <code>byte[]</code> as a String
|
|
* using the default character encoding of the platform.
|
|
*
|
|
* @param input the byte array to read from
|
|
* @return the requested String
|
|
* @throws NullPointerException if the input is null
|
|
* @throws IOException if an I/O error occurs (never occurs)
|
|
* @deprecated Use {@link String#String(byte[])}
|
|
*/
|
|
public static String toString(byte[] input) throws IOException {
|
|
return new String(input);
|
|
}
|
|
|
|
/**
|
|
* Get the contents of a <code>byte[]</code> as a String
|
|
* using the specified character encoding.
|
|
* <p>
|
|
* Character encoding names can be found at
|
|
* <a href="http://www.iana.org/assignments/character-sets">IANA</a>.
|
|
*
|
|
* @param input the byte array to read from
|
|
* @param encoding the encoding to use, null means platform default
|
|
* @return the requested String
|
|
* @throws NullPointerException if the input is null
|
|
* @throws IOException if an I/O error occurs (never occurs)
|
|
* @deprecated Use {@link String#String(byte[],String)}
|
|
*/
|
|
public static String toString(byte[] input, String encoding)
|
|
throws IOException {
|
|
if (encoding == null) {
|
|
return new String(input);
|
|
} else {
|
|
return new String(input, encoding);
|
|
}
|
|
}
|
|
|
|
// readLines
|
|
//-----------------------------------------------------------------------
|
|
/**
|
|
* Get the contents of an <code>InputStream</code> as a list of Strings,
|
|
* one entry per line, using the default character encoding of the platform.
|
|
* <p>
|
|
* This method buffers the input internally, so there is no need to use a
|
|
* <code>BufferedInputStream</code>.
|
|
*
|
|
* @param input the <code>InputStream</code> to read from, not null
|
|
* @return the list of Strings, never null
|
|
* @throws NullPointerException if the input is null
|
|
* @throws IOException if an I/O error occurs
|
|
* @since Commons IO 1.1
|
|
*/
|
|
public static List<String> readLines(InputStream input) throws IOException {
|
|
InputStreamReader reader = new InputStreamReader(input);
|
|
return readLines(reader);
|
|
}
|
|
|
|
/**
|
|
* Get the contents of an <code>InputStream</code> as a list of Strings,
|
|
* one entry per line, using the specified character encoding.
|
|
* <p>
|
|
* Character encoding names can be found at
|
|
* <a href="http://www.iana.org/assignments/character-sets">IANA</a>.
|
|
* <p>
|
|
* This method buffers the input internally, so there is no need to use a
|
|
* <code>BufferedInputStream</code>.
|
|
*
|
|
* @param input the <code>InputStream</code> to read from, not null
|
|
* @param encoding the encoding to use, null means platform default
|
|
* @return the list of Strings, never null
|
|
* @throws NullPointerException if the input is null
|
|
* @throws IOException if an I/O error occurs
|
|
* @since Commons IO 1.1
|
|
*/
|
|
public static List<String> readLines(InputStream input, String encoding) throws IOException {
|
|
if (encoding == null) {
|
|
return readLines(input);
|
|
} else {
|
|
InputStreamReader reader = new InputStreamReader(input, encoding);
|
|
return readLines(reader);
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Get the contents of a <code>Reader</code> as a list of Strings,
|
|
* one entry per line.
|
|
* <p>
|
|
* This method buffers the input internally, so there is no need to use a
|
|
* <code>BufferedReader</code>.
|
|
*
|
|
* @param input the <code>Reader</code> to read from, not null
|
|
* @return the list of Strings, never null
|
|
* @throws NullPointerException if the input is null
|
|
* @throws IOException if an I/O error occurs
|
|
* @since Commons IO 1.1
|
|
*/
|
|
public static List<String> readLines(Reader input) throws IOException {
|
|
BufferedReader reader = new BufferedReader(input);
|
|
List<String> list = new ArrayList<String>();
|
|
String line = reader.readLine();
|
|
while (line != null) {
|
|
list.add(line);
|
|
line = reader.readLine();
|
|
}
|
|
return list;
|
|
}
|
|
|
|
// lineIterator
|
|
//-----------------------------------------------------------------------
|
|
/**
|
|
* Return an Iterator for the lines in a <code>Reader</code>.
|
|
* <p>
|
|
* <code>LineIterator</code> holds a reference to the open
|
|
* <code>Reader</code> specified here. When you have finished with the
|
|
* iterator you should close the reader to free internal resources.
|
|
* This can be done by closing the reader directly, or by calling
|
|
* {@link LineIterator#close()} or {@link LineIterator#closeQuietly(LineIterator)}.
|
|
* <p>
|
|
* The recommended usage pattern is:
|
|
* <pre>
|
|
* try {
|
|
* LineIterator it = IOUtils.lineIterator(reader);
|
|
* while (it.hasNext()) {
|
|
* String line = it.nextLine();
|
|
* /// do something with line
|
|
* }
|
|
* } finally {
|
|
* IOUtils.closeQuietly(reader);
|
|
* }
|
|
* </pre>
|
|
*
|
|
* @param reader the <code>Reader</code> to read from, not null
|
|
* @return an Iterator of the lines in the reader, never null
|
|
* @throws IllegalArgumentException if the reader is null
|
|
* @since Commons IO 1.2
|
|
*/
|
|
public static LineIterator lineIterator(Reader reader) {
|
|
return new LineIterator(reader);
|
|
}
|
|
|
|
/**
|
|
* Return an Iterator for the lines in an <code>InputStream</code>, using
|
|
* the character encoding specified (or default encoding if null).
|
|
* <p>
|
|
* <code>LineIterator</code> holds a reference to the open
|
|
* <code>InputStream</code> specified here. When you have finished with
|
|
* the iterator you should close the stream to free internal resources.
|
|
* This can be done by closing the stream directly, or by calling
|
|
* {@link LineIterator#close()} or {@link LineIterator#closeQuietly(LineIterator)}.
|
|
* <p>
|
|
* The recommended usage pattern is:
|
|
* <pre>
|
|
* try {
|
|
* LineIterator it = IOUtils.lineIterator(stream, "UTF-8");
|
|
* while (it.hasNext()) {
|
|
* String line = it.nextLine();
|
|
* /// do something with line
|
|
* }
|
|
* } finally {
|
|
* IOUtils.closeQuietly(stream);
|
|
* }
|
|
* </pre>
|
|
*
|
|
* @param input the <code>InputStream</code> to read from, not null
|
|
* @param encoding the encoding to use, null means platform default
|
|
* @return an Iterator of the lines in the reader, never null
|
|
* @throws IllegalArgumentException if the input is null
|
|
* @throws IOException if an I/O error occurs, such as if the encoding is invalid
|
|
* @since Commons IO 1.2
|
|
*/
|
|
public static LineIterator lineIterator(InputStream input, String encoding)
|
|
throws IOException {
|
|
Reader reader = null;
|
|
if (encoding == null) {
|
|
reader = new InputStreamReader(input);
|
|
} else {
|
|
reader = new InputStreamReader(input, encoding);
|
|
}
|
|
return new LineIterator(reader);
|
|
}
|
|
|
|
//-----------------------------------------------------------------------
|
|
/**
|
|
* Convert the specified string to an input stream, encoded as bytes
|
|
* using the default character encoding of the platform.
|
|
*
|
|
* @param input the string to convert
|
|
* @return an input stream
|
|
* @since Commons IO 1.1
|
|
*/
|
|
public static InputStream toInputStream(String input) {
|
|
byte[] bytes = input.getBytes();
|
|
return new ByteArrayInputStream(bytes);
|
|
}
|
|
|
|
/**
|
|
* Convert the specified string to an input stream, encoded as bytes
|
|
* using the specified character encoding.
|
|
* <p>
|
|
* Character encoding names can be found at
|
|
* <a href="http://www.iana.org/assignments/character-sets">IANA</a>.
|
|
*
|
|
* @param input the string to convert
|
|
* @param encoding the encoding to use, null means platform default
|
|
* @throws IOException if the encoding is invalid
|
|
* @return an input stream
|
|
* @since Commons IO 1.1
|
|
*/
|
|
public static InputStream toInputStream(String input, String encoding) throws IOException {
|
|
byte[] bytes = encoding != null ? input.getBytes(encoding) : input.getBytes();
|
|
return new ByteArrayInputStream(bytes);
|
|
}
|
|
|
|
// write byte[]
|
|
//-----------------------------------------------------------------------
|
|
/**
|
|
* Writes bytes from a <code>byte[]</code> to an <code>OutputStream</code>.
|
|
*
|
|
* @param data the byte array to write, do not modify during output,
|
|
* null ignored
|
|
* @param output the <code>OutputStream</code> to write to
|
|
* @throws NullPointerException if output is null
|
|
* @throws IOException if an I/O error occurs
|
|
* @since Commons IO 1.1
|
|
*/
|
|
public static void write(byte[] data, OutputStream output)
|
|
throws IOException {
|
|
if (data != null) {
|
|
output.write(data);
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Writes bytes from a <code>byte[]</code> to chars on a <code>Writer</code>
|
|
* using the default character encoding of the platform.
|
|
* <p>
|
|
* This method uses {@link String#String(byte[])}.
|
|
*
|
|
* @param data the byte array to write, do not modify during output,
|
|
* null ignored
|
|
* @param output the <code>Writer</code> to write to
|
|
* @throws NullPointerException if output is null
|
|
* @throws IOException if an I/O error occurs
|
|
* @since Commons IO 1.1
|
|
*/
|
|
public static void write(byte[] data, Writer output) throws IOException {
|
|
if (data != null) {
|
|
output.write(new String(data));
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Writes bytes from a <code>byte[]</code> to chars on a <code>Writer</code>
|
|
* using the specified character encoding.
|
|
* <p>
|
|
* Character encoding names can be found at
|
|
* <a href="http://www.iana.org/assignments/character-sets">IANA</a>.
|
|
* <p>
|
|
* This method uses {@link String#String(byte[], String)}.
|
|
*
|
|
* @param data the byte array to write, do not modify during output,
|
|
* null ignored
|
|
* @param output the <code>Writer</code> to write to
|
|
* @param encoding the encoding to use, null means platform default
|
|
* @throws NullPointerException if output is null
|
|
* @throws IOException if an I/O error occurs
|
|
* @since Commons IO 1.1
|
|
*/
|
|
public static void write(byte[] data, Writer output, String encoding)
|
|
throws IOException {
|
|
if (data != null) {
|
|
if (encoding == null) {
|
|
write(data, output);
|
|
} else {
|
|
output.write(new String(data, encoding));
|
|
}
|
|
}
|
|
}
|
|
|
|
// write char[]
|
|
//-----------------------------------------------------------------------
|
|
/**
|
|
* Writes chars from a <code>char[]</code> to a <code>Writer</code>
|
|
* using the default character encoding of the platform.
|
|
*
|
|
* @param data the char array to write, do not modify during output,
|
|
* null ignored
|
|
* @param output the <code>Writer</code> to write to
|
|
* @throws NullPointerException if output is null
|
|
* @throws IOException if an I/O error occurs
|
|
* @since Commons IO 1.1
|
|
*/
|
|
public static void write(char[] data, Writer output) throws IOException {
|
|
if (data != null) {
|
|
output.write(data);
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Writes chars from a <code>char[]</code> to bytes on an
|
|
* <code>OutputStream</code>.
|
|
* <p>
|
|
* This method uses {@link String#String(char[])} and
|
|
* {@link String#getBytes()}.
|
|
*
|
|
* @param data the char array to write, do not modify during output,
|
|
* null ignored
|
|
* @param output the <code>OutputStream</code> to write to
|
|
* @throws NullPointerException if output is null
|
|
* @throws IOException if an I/O error occurs
|
|
* @since Commons IO 1.1
|
|
*/
|
|
public static void write(char[] data, OutputStream output)
|
|
throws IOException {
|
|
if (data != null) {
|
|
output.write(new String(data).getBytes());
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Writes chars from a <code>char[]</code> to bytes on an
|
|
* <code>OutputStream</code> using the specified character encoding.
|
|
* <p>
|
|
* Character encoding names can be found at
|
|
* <a href="http://www.iana.org/assignments/character-sets">IANA</a>.
|
|
* <p>
|
|
* This method uses {@link String#String(char[])} and
|
|
* {@link String#getBytes(String)}.
|
|
*
|
|
* @param data the char array to write, do not modify during output,
|
|
* null ignored
|
|
* @param output the <code>OutputStream</code> to write to
|
|
* @param encoding the encoding to use, null means platform default
|
|
* @throws NullPointerException if output is null
|
|
* @throws IOException if an I/O error occurs
|
|
* @since Commons IO 1.1
|
|
*/
|
|
public static void write(char[] data, OutputStream output, String encoding)
|
|
throws IOException {
|
|
if (data != null) {
|
|
if (encoding == null) {
|
|
write(data, output);
|
|
} else {
|
|
output.write(new String(data).getBytes(encoding));
|
|
}
|
|
}
|
|
}
|
|
|
|
// write String
|
|
//-----------------------------------------------------------------------
|
|
/**
|
|
* Writes chars from a <code>String</code> to a <code>Writer</code>.
|
|
*
|
|
* @param data the <code>String</code> to write, null ignored
|
|
* @param output the <code>Writer</code> to write to
|
|
* @throws NullPointerException if output is null
|
|
* @throws IOException if an I/O error occurs
|
|
* @since Commons IO 1.1
|
|
*/
|
|
public static void write(String data, Writer output) throws IOException {
|
|
if (data != null) {
|
|
output.write(data);
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Writes chars from a <code>String</code> to bytes on an
|
|
* <code>OutputStream</code> using the default character encoding of the
|
|
* platform.
|
|
* <p>
|
|
* This method uses {@link String#getBytes()}.
|
|
*
|
|
* @param data the <code>String</code> to write, null ignored
|
|
* @param output the <code>OutputStream</code> to write to
|
|
* @throws NullPointerException if output is null
|
|
* @throws IOException if an I/O error occurs
|
|
* @since Commons IO 1.1
|
|
*/
|
|
public static void write(String data, OutputStream output)
|
|
throws IOException {
|
|
if (data != null) {
|
|
output.write(data.getBytes());
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Writes chars from a <code>String</code> to bytes on an
|
|
* <code>OutputStream</code> using the specified character encoding.
|
|
* <p>
|
|
* Character encoding names can be found at
|
|
* <a href="http://www.iana.org/assignments/character-sets">IANA</a>.
|
|
* <p>
|
|
* This method uses {@link String#getBytes(String)}.
|
|
*
|
|
* @param data the <code>String</code> to write, null ignored
|
|
* @param output the <code>OutputStream</code> to write to
|
|
* @param encoding the encoding to use, null means platform default
|
|
* @throws NullPointerException if output is null
|
|
* @throws IOException if an I/O error occurs
|
|
* @since Commons IO 1.1
|
|
*/
|
|
public static void write(String data, OutputStream output, String encoding)
|
|
throws IOException {
|
|
if (data != null) {
|
|
if (encoding == null) {
|
|
write(data, output);
|
|
} else {
|
|
output.write(data.getBytes(encoding));
|
|
}
|
|
}
|
|
}
|
|
|
|
// write StringBuffer
|
|
//-----------------------------------------------------------------------
|
|
/**
|
|
* Writes chars from a <code>StringBuffer</code> to a <code>Writer</code>.
|
|
*
|
|
* @param data the <code>StringBuffer</code> to write, null ignored
|
|
* @param output the <code>Writer</code> to write to
|
|
* @throws NullPointerException if output is null
|
|
* @throws IOException if an I/O error occurs
|
|
* @since Commons IO 1.1
|
|
*/
|
|
public static void write(StringBuffer data, Writer output)
|
|
throws IOException {
|
|
if (data != null) {
|
|
output.write(data.toString());
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Writes chars from a <code>StringBuffer</code> to bytes on an
|
|
* <code>OutputStream</code> using the default character encoding of the
|
|
* platform.
|
|
* <p>
|
|
* This method uses {@link String#getBytes()}.
|
|
*
|
|
* @param data the <code>StringBuffer</code> to write, null ignored
|
|
* @param output the <code>OutputStream</code> to write to
|
|
* @throws NullPointerException if output is null
|
|
* @throws IOException if an I/O error occurs
|
|
* @since Commons IO 1.1
|
|
*/
|
|
public static void write(StringBuffer data, OutputStream output)
|
|
throws IOException {
|
|
if (data != null) {
|
|
output.write(data.toString().getBytes());
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Writes chars from a <code>StringBuffer</code> to bytes on an
|
|
* <code>OutputStream</code> using the specified character encoding.
|
|
* <p>
|
|
* Character encoding names can be found at
|
|
* <a href="http://www.iana.org/assignments/character-sets">IANA</a>.
|
|
* <p>
|
|
* This method uses {@link String#getBytes(String)}.
|
|
*
|
|
* @param data the <code>StringBuffer</code> to write, null ignored
|
|
* @param output the <code>OutputStream</code> to write to
|
|
* @param encoding the encoding to use, null means platform default
|
|
* @throws NullPointerException if output is null
|
|
* @throws IOException if an I/O error occurs
|
|
* @since Commons IO 1.1
|
|
*/
|
|
public static void write(StringBuffer data, OutputStream output,
|
|
String encoding) throws IOException {
|
|
if (data != null) {
|
|
if (encoding == null) {
|
|
write(data, output);
|
|
} else {
|
|
output.write(data.toString().getBytes(encoding));
|
|
}
|
|
}
|
|
}
|
|
|
|
// writeLines
|
|
//-----------------------------------------------------------------------
|
|
/**
|
|
* Writes the <code>toString()</code> value of each item in a collection to
|
|
* an <code>OutputStream</code> line by line, using the default character
|
|
* encoding of the platform and the specified line ending.
|
|
*
|
|
* @param lines the lines to write, null entries produce blank lines
|
|
* @param lineEnding the line separator to use, null is system default
|
|
* @param output the <code>OutputStream</code> to write to, not null, not closed
|
|
* @throws NullPointerException if the output is null
|
|
* @throws IOException if an I/O error occurs
|
|
* @since Commons IO 1.1
|
|
*/
|
|
public static void writeLines(Collection<Object> lines, String lineEnding,
|
|
OutputStream output) throws IOException {
|
|
if (lines == null) {
|
|
return;
|
|
}
|
|
if (lineEnding == null) {
|
|
lineEnding = LINE_SEPARATOR;
|
|
}
|
|
for (Iterator<Object> it = lines.iterator(); it.hasNext(); ) {
|
|
Object line = it.next();
|
|
if (line != null) {
|
|
output.write(line.toString().getBytes());
|
|
}
|
|
output.write(lineEnding.getBytes());
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Writes the <code>toString()</code> value of each item in a collection to
|
|
* an <code>OutputStream</code> line by line, using the specified character
|
|
* encoding and the specified line ending.
|
|
* <p>
|
|
* Character encoding names can be found at
|
|
* <a href="http://www.iana.org/assignments/character-sets">IANA</a>.
|
|
*
|
|
* @param lines the lines to write, null entries produce blank lines
|
|
* @param lineEnding the line separator to use, null is system default
|
|
* @param output the <code>OutputStream</code> to write to, not null, not closed
|
|
* @param encoding the encoding to use, null means platform default
|
|
* @throws NullPointerException if the output is null
|
|
* @throws IOException if an I/O error occurs
|
|
* @since Commons IO 1.1
|
|
*/
|
|
public static void writeLines(Collection<Object> lines, String lineEnding,
|
|
OutputStream output, String encoding) throws IOException {
|
|
if (encoding == null) {
|
|
writeLines(lines, lineEnding, output);
|
|
} else {
|
|
if (lines == null) {
|
|
return;
|
|
}
|
|
if (lineEnding == null) {
|
|
lineEnding = LINE_SEPARATOR;
|
|
}
|
|
for (Iterator<Object> it = lines.iterator(); it.hasNext(); ) {
|
|
Object line = it.next();
|
|
if (line != null) {
|
|
output.write(line.toString().getBytes(encoding));
|
|
}
|
|
output.write(lineEnding.getBytes(encoding));
|
|
}
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Writes the <code>toString()</code> value of each item in a collection to
|
|
* a <code>Writer</code> line by line, using the specified line ending.
|
|
*
|
|
* @param lines the lines to write, null entries produce blank lines
|
|
* @param lineEnding the line separator to use, null is system default
|
|
* @param writer the <code>Writer</code> to write to, not null, not closed
|
|
* @throws NullPointerException if the input is null
|
|
* @throws IOException if an I/O error occurs
|
|
* @since Commons IO 1.1
|
|
*/
|
|
public static void writeLines(Collection<Object> lines, String lineEnding,
|
|
Writer writer) throws IOException {
|
|
if (lines == null) {
|
|
return;
|
|
}
|
|
if (lineEnding == null) {
|
|
lineEnding = LINE_SEPARATOR;
|
|
}
|
|
for (Iterator<Object> it = lines.iterator(); it.hasNext(); ) {
|
|
Object line = it.next();
|
|
if (line != null) {
|
|
writer.write(line.toString());
|
|
}
|
|
writer.write(lineEnding);
|
|
}
|
|
}
|
|
|
|
// copy from InputStream
|
|
//-----------------------------------------------------------------------
|
|
/**
|
|
* Copy bytes from an <code>InputStream</code> to an
|
|
* <code>OutputStream</code>.
|
|
* <p>
|
|
* This method buffers the input internally, so there is no need to use a
|
|
* <code>BufferedInputStream</code>.
|
|
* <p>
|
|
* Large streams (over 2GB) will return a bytes copied value of
|
|
* <code>-1</code> after the copy has completed since the correct
|
|
* number of bytes cannot be returned as an int. For large streams
|
|
* use the <code>copyLarge(InputStream, OutputStream)</code> method.
|
|
*
|
|
* @param input the <code>InputStream</code> to read from
|
|
* @param output the <code>OutputStream</code> to write to
|
|
* @return the number of bytes copied
|
|
* @throws NullPointerException if the input or output is null
|
|
* @throws IOException if an I/O error occurs
|
|
* @throws ArithmeticException if the byte count is too large
|
|
* @since Commons IO 1.1
|
|
*/
|
|
public static int copy(InputStream input, OutputStream output) throws IOException {
|
|
long count = copyLarge(input, output);
|
|
if (count > Integer.MAX_VALUE) {
|
|
return -1;
|
|
}
|
|
return (int) count;
|
|
}
|
|
|
|
/**
|
|
* Copy bytes from a large (over 2GB) <code>InputStream</code> to an
|
|
* <code>OutputStream</code>.
|
|
* <p>
|
|
* This method buffers the input internally, so there is no need to use a
|
|
* <code>BufferedInputStream</code>.
|
|
*
|
|
* @param input the <code>InputStream</code> to read from
|
|
* @param output the <code>OutputStream</code> to write to
|
|
* @return the number of bytes copied
|
|
* @throws NullPointerException if the input or output is null
|
|
* @throws IOException if an I/O error occurs
|
|
* @since Commons IO 1.3
|
|
*/
|
|
public static long copyLarge(InputStream input, OutputStream output)
|
|
throws IOException {
|
|
byte[] buffer = new byte[DEFAULT_BUFFER_SIZE];
|
|
long count = 0;
|
|
int n = 0;
|
|
while (-1 != (n = input.read(buffer))) {
|
|
output.write(buffer, 0, n);
|
|
count += n;
|
|
}
|
|
return count;
|
|
}
|
|
|
|
/**
|
|
* Copy bytes from an <code>InputStream</code> to chars on a
|
|
* <code>Writer</code> using the default character encoding of the platform.
|
|
* <p>
|
|
* This method buffers the input internally, so there is no need to use a
|
|
* <code>BufferedInputStream</code>.
|
|
* <p>
|
|
* This method uses {@link InputStreamReader}.
|
|
*
|
|
* @param input the <code>InputStream</code> to read from
|
|
* @param output the <code>Writer</code> to write to
|
|
* @throws NullPointerException if the input or output is null
|
|
* @throws IOException if an I/O error occurs
|
|
* @since Commons IO 1.1
|
|
*/
|
|
public static void copy(InputStream input, Writer output)
|
|
throws IOException {
|
|
InputStreamReader in = new InputStreamReader(input);
|
|
copy(in, output);
|
|
}
|
|
|
|
/**
|
|
* Copy bytes from an <code>InputStream</code> to chars on a
|
|
* <code>Writer</code> using the specified character encoding.
|
|
* <p>
|
|
* This method buffers the input internally, so there is no need to use a
|
|
* <code>BufferedInputStream</code>.
|
|
* <p>
|
|
* Character encoding names can be found at
|
|
* <a href="http://www.iana.org/assignments/character-sets">IANA</a>.
|
|
* <p>
|
|
* This method uses {@link InputStreamReader}.
|
|
*
|
|
* @param input the <code>InputStream</code> to read from
|
|
* @param output the <code>Writer</code> to write to
|
|
* @param encoding the encoding to use, null means platform default
|
|
* @throws NullPointerException if the input or output is null
|
|
* @throws IOException if an I/O error occurs
|
|
* @since Commons IO 1.1
|
|
*/
|
|
public static void copy(InputStream input, Writer output, String encoding)
|
|
throws IOException {
|
|
if (encoding == null) {
|
|
copy(input, output);
|
|
} else {
|
|
InputStreamReader in = new InputStreamReader(input, encoding);
|
|
copy(in, output);
|
|
}
|
|
}
|
|
|
|
// copy from Reader
|
|
//-----------------------------------------------------------------------
|
|
/**
|
|
* Copy chars from a <code>Reader</code> to a <code>Writer</code>.
|
|
* <p>
|
|
* This method buffers the input internally, so there is no need to use a
|
|
* <code>BufferedReader</code>.
|
|
* <p>
|
|
* Large streams (over 2GB) will return a chars copied value of
|
|
* <code>-1</code> after the copy has completed since the correct
|
|
* number of chars cannot be returned as an int. For large streams
|
|
* use the <code>copyLarge(Reader, Writer)</code> method.
|
|
*
|
|
* @param input the <code>Reader</code> to read from
|
|
* @param output the <code>Writer</code> to write to
|
|
* @return the number of characters copied
|
|
* @throws NullPointerException if the input or output is null
|
|
* @throws IOException if an I/O error occurs
|
|
* @throws ArithmeticException if the character count is too large
|
|
* @since Commons IO 1.1
|
|
*/
|
|
public static int copy(Reader input, Writer output) throws IOException {
|
|
long count = copyLarge(input, output);
|
|
if (count > Integer.MAX_VALUE) {
|
|
return -1;
|
|
}
|
|
return (int) count;
|
|
}
|
|
|
|
/**
|
|
* Copy chars from a large (over 2GB) <code>Reader</code> to a <code>Writer</code>.
|
|
* <p>
|
|
* This method buffers the input internally, so there is no need to use a
|
|
* <code>BufferedReader</code>.
|
|
*
|
|
* @param input the <code>Reader</code> to read from
|
|
* @param output the <code>Writer</code> to write to
|
|
* @return the number of characters copied
|
|
* @throws NullPointerException if the input or output is null
|
|
* @throws IOException if an I/O error occurs
|
|
* @since Commons IO 1.3
|
|
*/
|
|
public static long copyLarge(Reader input, Writer output) throws IOException {
|
|
char[] buffer = new char[DEFAULT_BUFFER_SIZE];
|
|
long count = 0;
|
|
int n = 0;
|
|
while (-1 != (n = input.read(buffer))) {
|
|
output.write(buffer, 0, n);
|
|
count += n;
|
|
}
|
|
return count;
|
|
}
|
|
|
|
/**
|
|
* Copy chars from a <code>Reader</code> to bytes on an
|
|
* <code>OutputStream</code> using the default character encoding of the
|
|
* platform, and calling flush.
|
|
* <p>
|
|
* This method buffers the input internally, so there is no need to use a
|
|
* <code>BufferedReader</code>.
|
|
* <p>
|
|
* Due to the implementation of OutputStreamWriter, this method performs a
|
|
* flush.
|
|
* <p>
|
|
* This method uses {@link OutputStreamWriter}.
|
|
*
|
|
* @param input the <code>Reader</code> to read from
|
|
* @param output the <code>OutputStream</code> to write to
|
|
* @throws NullPointerException if the input or output is null
|
|
* @throws IOException if an I/O error occurs
|
|
* @since Commons IO 1.1
|
|
*/
|
|
public static void copy(Reader input, OutputStream output)
|
|
throws IOException {
|
|
OutputStreamWriter out = new OutputStreamWriter(output);
|
|
copy(input, out);
|
|
// XXX Unless anyone is planning on rewriting OutputStreamWriter, we
|
|
// have to flush here.
|
|
out.flush();
|
|
}
|
|
|
|
/**
|
|
* Copy chars from a <code>Reader</code> to bytes on an
|
|
* <code>OutputStream</code> using the specified character encoding, and
|
|
* calling flush.
|
|
* <p>
|
|
* This method buffers the input internally, so there is no need to use a
|
|
* <code>BufferedReader</code>.
|
|
* <p>
|
|
* Character encoding names can be found at
|
|
* <a href="http://www.iana.org/assignments/character-sets">IANA</a>.
|
|
* <p>
|
|
* Due to the implementation of OutputStreamWriter, this method performs a
|
|
* flush.
|
|
* <p>
|
|
* This method uses {@link OutputStreamWriter}.
|
|
*
|
|
* @param input the <code>Reader</code> to read from
|
|
* @param output the <code>OutputStream</code> to write to
|
|
* @param encoding the encoding to use, null means platform default
|
|
* @throws NullPointerException if the input or output is null
|
|
* @throws IOException if an I/O error occurs
|
|
* @since Commons IO 1.1
|
|
*/
|
|
public static void copy(Reader input, OutputStream output, String encoding)
|
|
throws IOException {
|
|
if (encoding == null) {
|
|
copy(input, output);
|
|
} else {
|
|
OutputStreamWriter out = new OutputStreamWriter(output, encoding);
|
|
copy(input, out);
|
|
// XXX Unless anyone is planning on rewriting OutputStreamWriter,
|
|
// we have to flush here.
|
|
out.flush();
|
|
}
|
|
}
|
|
|
|
// content equals
|
|
//-----------------------------------------------------------------------
|
|
/**
|
|
* Compare the contents of two Streams to determine if they are equal or
|
|
* not.
|
|
* <p>
|
|
* This method buffers the input internally using
|
|
* <code>BufferedInputStream</code> if they are not already buffered.
|
|
*
|
|
* @param input1 the first stream
|
|
* @param input2 the second stream
|
|
* @return true if the content of the streams are equal or they both don't
|
|
* exist, false otherwise
|
|
* @throws NullPointerException if either input is null
|
|
* @throws IOException if an I/O error occurs
|
|
*/
|
|
public static boolean contentEquals(InputStream input1, InputStream input2)
|
|
throws IOException {
|
|
if (!(input1 instanceof BufferedInputStream)) {
|
|
input1 = new BufferedInputStream(input1);
|
|
}
|
|
if (!(input2 instanceof BufferedInputStream)) {
|
|
input2 = new BufferedInputStream(input2);
|
|
}
|
|
|
|
int ch = input1.read();
|
|
while (-1 != ch) {
|
|
int ch2 = input2.read();
|
|
if (ch != ch2) {
|
|
return false;
|
|
}
|
|
ch = input1.read();
|
|
}
|
|
|
|
int ch2 = input2.read();
|
|
return (ch2 == -1);
|
|
}
|
|
|
|
/**
|
|
* Compare the contents of two Readers to determine if they are equal or
|
|
* not.
|
|
* <p>
|
|
* This method buffers the input internally using
|
|
* <code>BufferedReader</code> if they are not already buffered.
|
|
*
|
|
* @param input1 the first reader
|
|
* @param input2 the second reader
|
|
* @return true if the content of the readers are equal or they both don't
|
|
* exist, false otherwise
|
|
* @throws NullPointerException if either input is null
|
|
* @throws IOException if an I/O error occurs
|
|
* @since Commons IO 1.1
|
|
*/
|
|
public static boolean contentEquals(Reader input1, Reader input2)
|
|
throws IOException {
|
|
if (!(input1 instanceof BufferedReader)) {
|
|
input1 = new BufferedReader(input1);
|
|
}
|
|
if (!(input2 instanceof BufferedReader)) {
|
|
input2 = new BufferedReader(input2);
|
|
}
|
|
|
|
int ch = input1.read();
|
|
while (-1 != ch) {
|
|
int ch2 = input2.read();
|
|
if (ch != ch2) {
|
|
return false;
|
|
}
|
|
ch = input1.read();
|
|
}
|
|
|
|
int ch2 = input2.read();
|
|
return (ch2 == -1);
|
|
}
|
|
|
|
}
|