| /**************************************************************** |
| * 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 org.apache.james.mime4j.MimeException; |
| import org.apache.james.mime4j.codec.DecodeMonitor; |
| import org.apache.james.mime4j.dom.FieldParser; |
| import org.apache.james.mime4j.dom.Header; |
| import org.apache.james.mime4j.dom.field.ParsedField; |
| import org.apache.james.mime4j.field.LenientFieldParser; |
| import org.apache.james.mime4j.parser.AbstractContentHandler; |
| import org.apache.james.mime4j.stream.Field; |
| |
| /** |
| * Abstract implementation of ContentHandler that automates common |
| * tasks. Currently performs header parsing. |
| * |
| * Older versions of this class performed decoding of content streams. |
| * This can be now easily achieved by calling setContentDecoding(true) on the MimeStreamParser. |
| */ |
| public abstract class SimpleContentHandler extends AbstractContentHandler { |
| |
| private final FieldParser<? extends ParsedField> fieldParser; |
| private final DecodeMonitor monitor; |
| |
| public SimpleContentHandler( |
| final FieldParser<? extends ParsedField> fieldParser, |
| final DecodeMonitor monitor) { |
| super(); |
| this.fieldParser = fieldParser != null ? fieldParser : LenientFieldParser.getParser(); |
| this.monitor = monitor != null ? monitor : DecodeMonitor.SILENT; |
| } |
| |
| public SimpleContentHandler() { |
| this(null, null); |
| } |
| |
| /** |
| * Called after headers are parsed. |
| */ |
| public abstract void headers(Header header); |
| |
| /* Implement introduced callbacks. */ |
| |
| private Header currHeader; |
| |
| /** |
| * @see org.apache.james.mime4j.parser.AbstractContentHandler#startHeader() |
| */ |
| @Override |
| public final void startHeader() { |
| currHeader = new HeaderImpl(); |
| } |
| |
| /** |
| * @see org.apache.james.mime4j.parser.AbstractContentHandler#field(Field) |
| */ |
| @Override |
| public final void field(Field field) throws MimeException { |
| ParsedField parsedField; |
| if (field instanceof ParsedField) { |
| parsedField = (ParsedField) field; |
| } else { |
| parsedField = fieldParser.parse(field, monitor); |
| } |
| currHeader.addField(parsedField); |
| } |
| |
| /** |
| * @see org.apache.james.mime4j.parser.AbstractContentHandler#endHeader() |
| */ |
| @Override |
| public final void endHeader() { |
| Header tmp = currHeader; |
| currHeader = null; |
| headers(tmp); |
| } |
| |
| } |