/*
* 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.uima.tools.viewer;
import java.awt.Dimension;
import java.awt.Insets;
import java.awt.event.ComponentAdapter;
import java.awt.event.ComponentEvent;
import java.io.ByteArrayOutputStream;
import java.io.InputStream;
import java.net.URL;
import java.net.URLConnection;
import javax.swing.JApplet;
import org.apache.uima.cas.CAS;
import org.apache.uima.cas.admin.CASFactory;
import org.apache.uima.cas.admin.CASMgr;
import org.apache.uima.cas.impl.CASCompleteSerializer;
import org.apache.uima.cas.impl.Serialization;
import org.apache.uima.internal.util.SerializationUtils;
/**
* The CasTreeViewer as an Applet.
*
*
*/
public class CasTreeViewerApplet extends JApplet {
private static final long serialVersionUID = 7539612752281789849L;
/** The CAS Tree Viewer panel */
private CasTreeViewer mTreeViewer;
/**
* Called when the applet is initialized.
*/
public void init() {
try {
// get applet parameter - URL from which to get the CAS
String casURL = getParameter("CasUrl");
// open URL connection to get the serialized CAS
URLConnection con = new URL(casURL).openConnection();
con.setDoInput(true);
con.setDoOutput(true);
con.setUseCaches(false);
con.setDefaultUseCaches(false);
con.setRequestProperty("Content-Type", "application/octet-stream");
// con.connect();
InputStream in = con.getInputStream();
ByteArrayOutputStream byteStream = new ByteArrayOutputStream();
byte[] buf = new byte[2048];
int bytesRead = in.read(buf);
while (bytesRead > 0) {
byteStream.write(buf, 0, bytesRead);
bytesRead = in.read(buf);
}
byte[] bytes = byteStream.toByteArray();
in.close();
byteStream.close();
System.out.println("Got " + bytes.length + " bytes.");
// deserialize CAS
CASMgr casMgr = CASFactory.createCAS();
CASCompleteSerializer serializer = (CASCompleteSerializer) SerializationUtils
.deserialize(bytes);
Serialization.deserializeCASComplete(serializer, casMgr);
// create tree viewer component and add to this applet
mTreeViewer = new CasTreeViewer(casMgr.getCAS().getView(CAS.NAME_DEFAULT_SOFA));
getContentPane().add(mTreeViewer);
// add a listener that detects resize events
addComponentListener(new MyComponentListener());
// set initial size of tree viewer panel
resizeTreeViewer();
} catch (Exception e) {
e.printStackTrace();
}
}
/**
* Sets the size of the tree viewer so that it fits within the applet.
*/
private void resizeTreeViewer() {
Dimension appletSize = getSize();
Insets insets = getInsets();
Dimension panelSize = new Dimension(appletSize.width - insets.left - insets.right - 10,
appletSize.height - insets.top - insets.bottom - 10);
mTreeViewer.setPreferredSize(panelSize);
mTreeViewer.setSize(panelSize);
validate();
}
/**
* A listener for detecting resize events. Sets the size of the TreeViewer panel whenever the
* applet's size changes.
*/
class MyComponentListener extends ComponentAdapter {
public void componentResized(ComponentEvent e) {
resizeTreeViewer();
}
}
}