| /**************************************************************** |
| * 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.IOException; |
| import java.io.InputStream; |
| import java.util.Stack; |
| |
| import org.apache.james.mime4j.MimeException; |
| import org.apache.james.mime4j.codec.Base64InputStream; |
| import org.apache.james.mime4j.codec.QuotedPrintableInputStream; |
| import org.apache.james.mime4j.descriptor.BodyDescriptor; |
| import org.apache.james.mime4j.field.AbstractField; |
| import org.apache.james.mime4j.parser.ContentHandler; |
| import org.apache.james.mime4j.parser.Field; |
| import org.apache.james.mime4j.parser.MimeStreamParser; |
| import org.apache.james.mime4j.storage.StorageProvider; |
| import org.apache.james.mime4j.util.ByteArrayBuffer; |
| import org.apache.james.mime4j.util.ByteSequence; |
| import org.apache.james.mime4j.util.MimeUtil; |
| |
| /** |
| * A <code>ContentHandler</code> for building an <code>Entity</code> to be |
| * used in conjunction with a {@link MimeStreamParser}. |
| */ |
| public class MessageBuilder implements ContentHandler { |
| |
| private final Entity entity; |
| private final BodyFactory bodyFactory; |
| private Stack<Object> stack = new Stack<Object>(); |
| |
| public MessageBuilder(Entity entity) { |
| this.entity = entity; |
| this.bodyFactory = new BodyFactory(); |
| } |
| |
| public MessageBuilder(Entity entity, StorageProvider storageProvider) { |
| this.entity = entity; |
| this.bodyFactory = new BodyFactory(storageProvider); |
| } |
| |
| private void expect(Class<?> c) { |
| if (!c.isInstance(stack.peek())) { |
| throw new IllegalStateException("Internal stack error: " |
| + "Expected '" + c.getName() + "' found '" |
| + stack.peek().getClass().getName() + "'"); |
| } |
| } |
| |
| /** |
| * @see org.apache.james.mime4j.parser.ContentHandler#startMessage() |
| */ |
| public void startMessage() throws MimeException { |
| if (stack.isEmpty()) { |
| stack.push(this.entity); |
| } else { |
| expect(Entity.class); |
| Message m = new Message(); |
| ((Entity) stack.peek()).setBody(m); |
| stack.push(m); |
| } |
| } |
| |
| /** |
| * @see org.apache.james.mime4j.parser.ContentHandler#endMessage() |
| */ |
| public void endMessage() throws MimeException { |
| expect(Message.class); |
| stack.pop(); |
| } |
| |
| /** |
| * @see org.apache.james.mime4j.parser.ContentHandler#startHeader() |
| */ |
| public void startHeader() throws MimeException { |
| stack.push(new Header()); |
| } |
| |
| /** |
| * @see org.apache.james.mime4j.parser.ContentHandler#field(Field) |
| */ |
| public void field(Field field) throws MimeException { |
| expect(Header.class); |
| Field parsedField = AbstractField.parse(field.getRaw()); |
| ((Header) stack.peek()).addField(parsedField); |
| } |
| |
| /** |
| * @see org.apache.james.mime4j.parser.ContentHandler#endHeader() |
| */ |
| public void endHeader() throws MimeException { |
| expect(Header.class); |
| Header h = (Header) stack.pop(); |
| expect(Entity.class); |
| ((Entity) stack.peek()).setHeader(h); |
| } |
| |
| /** |
| * @see org.apache.james.mime4j.parser.ContentHandler#startMultipart(org.apache.james.mime4j.descriptor.BodyDescriptor) |
| */ |
| public void startMultipart(final BodyDescriptor bd) throws MimeException { |
| expect(Entity.class); |
| |
| final Entity e = (Entity) stack.peek(); |
| final String subType = bd.getSubType(); |
| final Multipart multiPart = new Multipart(subType); |
| e.setBody(multiPart); |
| stack.push(multiPart); |
| } |
| |
| /** |
| * @see org.apache.james.mime4j.parser.ContentHandler#body(org.apache.james.mime4j.descriptor.BodyDescriptor, java.io.InputStream) |
| */ |
| public void body(BodyDescriptor bd, final InputStream is) throws MimeException, IOException { |
| expect(Entity.class); |
| |
| final String enc = bd.getTransferEncoding(); |
| |
| final Body body; |
| |
| final InputStream decodedStream; |
| if (MimeUtil.ENC_BASE64.equals(enc)) { |
| decodedStream = new Base64InputStream(is); |
| } else if (MimeUtil.ENC_QUOTED_PRINTABLE.equals(enc)) { |
| decodedStream = new QuotedPrintableInputStream(is); |
| } else { |
| decodedStream = is; |
| } |
| |
| if (bd.getMimeType().startsWith("text/")) { |
| body = bodyFactory.textBody(decodedStream, bd.getCharset()); |
| } else { |
| body = bodyFactory.binaryBody(decodedStream); |
| } |
| |
| Entity entity = ((Entity) stack.peek()); |
| entity.setBody(body); |
| } |
| |
| /** |
| * @see org.apache.james.mime4j.parser.ContentHandler#endMultipart() |
| */ |
| public void endMultipart() throws MimeException { |
| stack.pop(); |
| } |
| |
| /** |
| * @see org.apache.james.mime4j.parser.ContentHandler#startBodyPart() |
| */ |
| public void startBodyPart() throws MimeException { |
| expect(Multipart.class); |
| |
| BodyPart bodyPart = new BodyPart(); |
| ((Multipart) stack.peek()).addBodyPart(bodyPart); |
| stack.push(bodyPart); |
| } |
| |
| /** |
| * @see org.apache.james.mime4j.parser.ContentHandler#endBodyPart() |
| */ |
| public void endBodyPart() throws MimeException { |
| expect(BodyPart.class); |
| stack.pop(); |
| } |
| |
| /** |
| * @see org.apache.james.mime4j.parser.ContentHandler#epilogue(java.io.InputStream) |
| */ |
| public void epilogue(InputStream is) throws MimeException, IOException { |
| expect(Multipart.class); |
| ByteSequence bytes = loadStream(is); |
| ((Multipart) stack.peek()).setEpilogueRaw(bytes); |
| } |
| |
| /** |
| * @see org.apache.james.mime4j.parser.ContentHandler#preamble(java.io.InputStream) |
| */ |
| public void preamble(InputStream is) throws MimeException, IOException { |
| expect(Multipart.class); |
| ByteSequence bytes = loadStream(is); |
| ((Multipart) stack.peek()).setPreambleRaw(bytes); |
| } |
| |
| /** |
| * Unsupported. |
| * @see org.apache.james.mime4j.parser.ContentHandler#raw(java.io.InputStream) |
| */ |
| public void raw(InputStream is) throws MimeException, IOException { |
| throw new UnsupportedOperationException("Not supported"); |
| } |
| |
| private static ByteSequence loadStream(InputStream in) throws IOException { |
| ByteArrayBuffer bab = new ByteArrayBuffer(64); |
| |
| int b; |
| while ((b = in.read()) != -1) { |
| bab.append(b); |
| } |
| |
| return bab; |
| } |
| |
| } |