/* | |
* 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.axis2.util; | |
import java.awt.datatransfer.DataFlavor; | |
import java.awt.datatransfer.UnsupportedFlavorException; | |
import java.io.IOException; | |
import java.io.InputStream; | |
import java.io.OutputStream; | |
import javax.activation.CommandInfo; | |
import javax.activation.CommandMap; | |
import javax.activation.DataHandler; | |
import javax.activation.DataSource; | |
import org.apache.commons.logging.Log; | |
import org.apache.commons.logging.LogFactory; | |
/** | |
* This class acts as a wrapper for the javax.activation.DataHandler class. | |
* It is used to store away a (potentially) user-defined content-type value along with | |
* the DataHandler instance. We'll delegate all method calls except for getContentType() | |
* to the real DataHandler instance. | |
*/ | |
public class WrappedDataHandler extends DataHandler { | |
private static final Log log = LogFactory.getLog(WrappedDataHandler.class); | |
DataHandler delegate; | |
String contentType; | |
private static FakeDataSource FAKE_DS = new FakeDataSource(); | |
// This class is simply used as a fake DataSource implementation so that the | |
// WrappedDataHandler class can call it's superclass's ctor with a non-null | |
// value that implements DataSource. The FakeDataSource instance will never | |
// be used, however. It's simply a placeholder. | |
private static class FakeDataSource implements DataSource { | |
public String getContentType() { | |
return "application/octet-stream"; | |
} | |
public InputStream getInputStream() throws IOException { | |
throw new UnsupportedOperationException(); | |
} | |
public String getName() { | |
return "FakeDataSource"; | |
} | |
public OutputStream getOutputStream() throws IOException { | |
throw new UnsupportedOperationException(); | |
} | |
} | |
/** | |
* Constructs a new instance of the WrappedDataHandler. | |
* @param _delegate the real DataHandler instance being wrapped | |
* @param _contentType the user-defined contentType associated with the DataHandler instance | |
*/ | |
public WrappedDataHandler(DataHandler _delegate, String _contentType) { | |
super(FAKE_DS); | |
delegate = _delegate; | |
contentType = _contentType; | |
if (log.isDebugEnabled()) { | |
log.debug("Created instance of WrappedDatahandler: " + this.toString() + ", contentType=" + contentType | |
+ "\nDelegate DataHandler: " + delegate.toString()); | |
} | |
} | |
/* (non-Javadoc) | |
* @see javax.activation.DataHandler#getAllCommands() | |
*/ | |
@Override | |
public CommandInfo[] getAllCommands() { | |
return delegate.getAllCommands(); | |
} | |
/* (non-Javadoc) | |
* @see javax.activation.DataHandler#getBean(javax.activation.CommandInfo) | |
*/ | |
@Override | |
public Object getBean(CommandInfo paramCommandInfo) { | |
return delegate.getBean(paramCommandInfo); | |
} | |
/* (non-Javadoc) | |
* @see javax.activation.DataHandler#getCommand(java.lang.String) | |
*/ | |
@Override | |
public CommandInfo getCommand(String paramString) { | |
return delegate.getCommand(paramString); | |
} | |
/* (non-Javadoc) | |
* @see javax.activation.DataHandler#getContent() | |
*/ | |
@Override | |
public Object getContent() throws IOException { | |
return delegate.getContent(); | |
} | |
/* (non-Javadoc) | |
* @see javax.activation.DataHandler#getContentType() | |
*/ | |
@Override | |
public String getContentType() { | |
return (contentType != null ? contentType : delegate.getContentType()); | |
} | |
/* (non-Javadoc) | |
* @see javax.activation.DataHandler#getDataSource() | |
*/ | |
@Override | |
public DataSource getDataSource() { | |
return delegate.getDataSource(); | |
} | |
/* (non-Javadoc) | |
* @see javax.activation.DataHandler#getInputStream() | |
*/ | |
@Override | |
public InputStream getInputStream() throws IOException { | |
return delegate.getInputStream(); | |
} | |
/* (non-Javadoc) | |
* @see javax.activation.DataHandler#getName() | |
*/ | |
@Override | |
public String getName() { | |
return delegate.getName(); | |
} | |
/* (non-Javadoc) | |
* @see javax.activation.DataHandler#getOutputStream() | |
*/ | |
@Override | |
public OutputStream getOutputStream() throws IOException { | |
return delegate.getOutputStream(); | |
} | |
/* (non-Javadoc) | |
* @see javax.activation.DataHandler#getPreferredCommands() | |
*/ | |
@Override | |
public CommandInfo[] getPreferredCommands() { | |
return delegate.getPreferredCommands(); | |
} | |
/* (non-Javadoc) | |
* @see javax.activation.DataHandler#getTransferData(java.awt.datatransfer.DataFlavor) | |
*/ | |
@Override | |
public Object getTransferData(DataFlavor paramDataFlavor) throws UnsupportedFlavorException, IOException { | |
return delegate.getTransferData(paramDataFlavor); | |
} | |
/* (non-Javadoc) | |
* @see javax.activation.DataHandler#getTransferDataFlavors() | |
*/ | |
@Override | |
public synchronized DataFlavor[] getTransferDataFlavors() { | |
return delegate.getTransferDataFlavors(); | |
} | |
/* (non-Javadoc) | |
* @see javax.activation.DataHandler#isDataFlavorSupported(java.awt.datatransfer.DataFlavor) | |
*/ | |
@Override | |
public boolean isDataFlavorSupported(DataFlavor paramDataFlavor) { | |
return delegate.isDataFlavorSupported(paramDataFlavor); | |
} | |
/* (non-Javadoc) | |
* @see javax.activation.DataHandler#setCommandMap(javax.activation.CommandMap) | |
*/ | |
@Override | |
public synchronized void setCommandMap(CommandMap paramCommandMap) { | |
delegate.setCommandMap(paramCommandMap); | |
} | |
/* (non-Javadoc) | |
* @see javax.activation.DataHandler#writeTo(java.io.OutputStream) | |
*/ | |
@Override | |
public void writeTo(OutputStream paramOutputStream) throws IOException { | |
delegate.writeTo(paramOutputStream); | |
} | |
} |