159 lines
5.3 KiB
Java
159 lines
5.3 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.james.mime4j.message;
|
|
|
|
import java.io.BufferedWriter;
|
|
import java.io.IOException;
|
|
import java.io.InputStream;
|
|
import java.io.OutputStream;
|
|
import java.io.OutputStreamWriter;
|
|
import java.util.Collections;
|
|
import java.util.HashMap;
|
|
import java.util.Iterator;
|
|
import java.util.LinkedList;
|
|
import java.util.List;
|
|
|
|
import org.apache.james.mime4j.AbstractContentHandler;
|
|
import org.apache.james.mime4j.MimeStreamParser;
|
|
import org.apache.james.mime4j.field.ContentTypeField;
|
|
import org.apache.james.mime4j.field.Field;
|
|
import org.apache.james.mime4j.util.CharsetUtil;
|
|
|
|
|
|
/**
|
|
* The header of an entity (see RFC 2045).
|
|
*
|
|
*
|
|
* @version $Id: Header.java,v 1.3 2004/10/04 15:36:44 ntherning Exp $
|
|
*/
|
|
public class Header {
|
|
private List<Field> fields = new LinkedList<Field>();
|
|
private HashMap<String, List<Field>> fieldMap = new HashMap<String, List<Field>>();
|
|
|
|
/**
|
|
* Creates a new empty <code>Header</code>.
|
|
*/
|
|
public Header() {
|
|
}
|
|
|
|
/**
|
|
* Creates a new <code>Header</code> from the specified stream.
|
|
*
|
|
* @param is the stream to read the header from.
|
|
*/
|
|
public Header(InputStream is) throws IOException {
|
|
final MimeStreamParser parser = new MimeStreamParser();
|
|
parser.setContentHandler(new AbstractContentHandler() {
|
|
@Override
|
|
public void endHeader() {
|
|
parser.stop();
|
|
}
|
|
@Override
|
|
public void field(String fieldData) {
|
|
addField(Field.parse(fieldData));
|
|
}
|
|
});
|
|
parser.parse(is);
|
|
}
|
|
|
|
/**
|
|
* Adds a field to the end of the list of fields.
|
|
*
|
|
* @param field the field to add.
|
|
*/
|
|
public void addField(Field field) {
|
|
List<Field> values = fieldMap.get(field.getName().toLowerCase());
|
|
if (values == null) {
|
|
values = new LinkedList<Field>();
|
|
fieldMap.put(field.getName().toLowerCase(), values);
|
|
}
|
|
values.add(field);
|
|
fields.add(field);
|
|
}
|
|
|
|
/**
|
|
* Gets the fields of this header. The returned list will not be
|
|
* modifiable.
|
|
*
|
|
* @return the list of <code>Field</code> objects.
|
|
*/
|
|
public List<Field> getFields() {
|
|
return Collections.unmodifiableList(fields);
|
|
}
|
|
|
|
/**
|
|
* Gets a <code>Field</code> given a field name. If there are multiple
|
|
* such fields defined in this header the first one will be returned.
|
|
*
|
|
* @param name the field name (e.g. From, Subject).
|
|
* @return the field or <code>null</code> if none found.
|
|
*/
|
|
public Field getField(String name) {
|
|
List<Field> l = fieldMap.get(name.toLowerCase());
|
|
if (l != null && !l.isEmpty()) {
|
|
return l.get(0);
|
|
}
|
|
return null;
|
|
}
|
|
|
|
/**
|
|
* Gets all <code>Field</code>s having the specified field name.
|
|
*
|
|
* @param name the field name (e.g. From, Subject).
|
|
* @return the list of fields.
|
|
*/
|
|
public List<Field> getFields(String name) {
|
|
List<Field> l = fieldMap.get(name.toLowerCase());
|
|
return Collections.unmodifiableList(l);
|
|
}
|
|
|
|
/**
|
|
* Return Header Object as String representation. Each headerline is
|
|
* seperated by "\r\n"
|
|
*
|
|
* @return headers
|
|
*/
|
|
@Override
|
|
public String toString() {
|
|
StringBuffer str = new StringBuffer();
|
|
for (Iterator<Field> it = fields.iterator(); it.hasNext();) {
|
|
str.append(it.next().toString());
|
|
str.append("\r\n");
|
|
}
|
|
return str.toString();
|
|
}
|
|
|
|
|
|
/**
|
|
* Write the Header to the given OutputStream
|
|
*
|
|
* @param out the OutputStream to write to
|
|
* @throws IOException
|
|
*/
|
|
public void writeTo(OutputStream out) throws IOException {
|
|
String charString = ((ContentTypeField) getField(Field.CONTENT_TYPE)).getCharset();
|
|
|
|
BufferedWriter writer = new BufferedWriter(new OutputStreamWriter(out, CharsetUtil.getCharset(charString)),8192);
|
|
writer.write(toString()+ "\r\n");
|
|
writer.flush();
|
|
}
|
|
|
|
}
|