129 lines
3.4 KiB
Java
129 lines
3.4 KiB
Java
/*
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* Licensed to the Apache Software Foundation (ASF) under one or more
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* contributor license agreements. See the NOTICE file distributed with
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* this work for additional information regarding copyright ownership.
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* The ASF licenses this file to You under the Apache License, Version 2.0
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* (the "License"); you may not use this file except in compliance with
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* the License. You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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/**
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* @author Rustem V. Rafikov
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* @version $Revision: 1.3 $
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*/
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package javax.imageio.stream;
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import java.io.*;
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/**
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* The FileImageOutputStream class implements ImageOutputStream and writes the
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* output data to a File or RandomAccessFile.
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*
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* @since Android 1.0
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*/
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public class FileImageOutputStream extends ImageOutputStreamImpl {
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/**
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* The file.
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*/
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RandomAccessFile file;
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/**
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* Instantiates a new FileImageOutputStream with the specified File.
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*
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* @param f
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* the output File.
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* @throws FileNotFoundException
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* if the file not found.
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* @throws IOException
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* if an I/O exception has occurred.
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*/
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public FileImageOutputStream(File f) throws FileNotFoundException, IOException {
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this(f != null ? new RandomAccessFile(f, "rw") : null);
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}
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/**
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* Instantiates a new FileImageOutputStream with the specified
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* RandomAccessFile.
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*
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* @param raf
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* the output RandomAccessFile.
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*/
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public FileImageOutputStream(RandomAccessFile raf) {
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if (raf == null) {
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throw new IllegalArgumentException("file should not be NULL");
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}
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file = raf;
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}
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@Override
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public void write(int b) throws IOException {
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checkClosed();
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// according to the spec for ImageOutputStreamImpl#flushBits()
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flushBits();
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file.write(b);
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streamPos++;
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}
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@Override
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public void write(byte[] b, int off, int len) throws IOException {
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checkClosed();
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// according to the spec for ImageOutputStreamImpl#flushBits()
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flushBits();
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file.write(b, off, len);
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streamPos += len;
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}
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@Override
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public int read() throws IOException {
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checkClosed();
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int rt = file.read();
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if (rt != -1) {
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streamPos++;
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}
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return rt;
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}
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@Override
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public int read(byte[] b, int off, int len) throws IOException {
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checkClosed();
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int rt = file.read(b, off, len);
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if (rt != -1) {
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streamPos += rt;
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}
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return rt;
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}
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@Override
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public long length() {
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try {
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checkClosed();
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return file.length();
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} catch (IOException e) {
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return super.length(); // -1L
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}
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}
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@Override
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public void seek(long pos) throws IOException {
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// -- checkClosed() is performed in super.seek()
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super.seek(pos);
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file.seek(pos);
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streamPos = file.getFilePointer();
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}
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@Override
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public void close() throws IOException {
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super.close();
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file.close();
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}
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}
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