| // Copyright 2009 The Apache Software Foundation |
| // |
| // Licensed 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.tapestry5.internal.services; |
| |
| import org.apache.tapestry5.internal.util.Base64OutputStream; |
| import org.apache.tapestry5.services.ClientDataSink; |
| import org.apache.tapestry5.services.URLEncoder; |
| |
| import java.io.BufferedOutputStream; |
| import java.io.IOException; |
| import java.io.ObjectOutputStream; |
| import java.io.OutputStream; |
| import java.util.zip.GZIPOutputStream; |
| |
| public class ClientDataSinkImpl implements ClientDataSink |
| { |
| private final Base64OutputStream base64OutputStream; |
| |
| private final ObjectOutputStream objectOutputStream; |
| |
| private final URLEncoder urlEncoder; |
| |
| private boolean closed; |
| |
| public ClientDataSinkImpl(URLEncoder urlEncoder) throws IOException |
| { |
| this.urlEncoder = urlEncoder; |
| base64OutputStream = new Base64OutputStream(); |
| |
| final BufferedOutputStream pipeline = new BufferedOutputStream(new GZIPOutputStream(base64OutputStream)); |
| |
| OutputStream guard = new OutputStream() |
| { |
| @Override |
| public void write(int b) throws IOException |
| { |
| pipeline.write(b); |
| } |
| |
| @Override |
| public void close() throws IOException |
| { |
| closed = true; |
| |
| pipeline.close(); |
| } |
| |
| @Override |
| public void flush() throws IOException |
| { |
| pipeline.flush(); |
| } |
| |
| @Override |
| public void write(byte[] b) throws IOException |
| { |
| pipeline.write(b); |
| } |
| |
| @Override |
| public void write(byte[] b, int off, int len) throws IOException |
| { |
| pipeline.write(b, off, len); |
| } |
| }; |
| |
| |
| objectOutputStream = new ObjectOutputStream(guard); |
| } |
| |
| public ObjectOutputStream getObjectOutputStream() |
| { |
| return objectOutputStream; |
| } |
| |
| public String getClientData() |
| { |
| if (!closed) |
| { |
| try |
| { |
| objectOutputStream.close(); |
| } |
| catch (IOException ex) |
| { |
| // Ignore. |
| } |
| } |
| |
| return base64OutputStream.toBase64(); |
| } |
| |
| public String getEncodedClientData() |
| { |
| return urlEncoder.encode(getClientData()); |
| } |
| } |