/*
* 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.harmony.beans;
import java.beans.XMLDecoder;
import java.util.HashMap;
import java.util.Map;
import java.util.Stack;
import java.util.Vector;
import org.apache.harmony.beans.internal.nls.Messages;
import org.xml.sax.Attributes;
import org.xml.sax.SAXException;
import org.xml.sax.helpers.DefaultHandler;
public class Handler extends DefaultHandler {
private Vector<Object> result;
private Vector<Command> commands;
private XMLDecoder decoder;
private Map<String, Command> references;
private Stack<Command> stack;
private int tabCount;
public Handler(XMLDecoder decoder, Vector<Object> result) {
this.decoder = decoder;
this.result = result;
this.commands = new Vector<Command>();
this.references = new HashMap<String, Command>();
this.stack = new Stack<Command>();
}
// clear collections to prepare parsing document
@Override
public void startDocument() {
references.clear();
tabCount = 0;
}
// create new command and put it on stack
@Override
public void startElement(String namespaceURI, String localeName,
String tagName, Attributes attrs) throws SAXException {
Command.printAttrs(tabCount, tagName, attrs);
Command cmd = tagName.equals("java") ? new Command(decoder, tagName, //$NON-NLS-1$
Command.parseAttrs(tagName, attrs)) : new Command(tagName,
Command.parseAttrs(tagName, attrs));
stack.push(cmd);
++tabCount;
}
// add data to command
@Override
public void characters(char[] text, int start, int length)
throws SAXException {
if (length > 0) {
String data = String.valueOf(text, start, length)
.replace('\n', ' ').replace('\t', ' ').trim();
if (data.length() > 0) {
Command.prn(tabCount, tabCount + ">setting data=" + data //$NON-NLS-1$
+ "<EOL>"); //$NON-NLS-1$
Command cmd = stack.peek();
cmd.setData(data);
}
}
}
// pop command from stack and put it to one of collections
@Override
public void endElement(String namespaceURI, String localeName,
String tagName) throws SAXException {
Command cmd = stack.pop();
// cmd.setTabCount(tabCount);
// find if command works in context
if (!stack.isEmpty()) {
Command ctx = stack.peek();
ctx.addChild(cmd);
}
// upper level commands
if (stack.size() == 1 && cmd.isExecutable()) {
commands.add(cmd);
}
// store reference to command
if (cmd.hasAttr("id")) { //$NON-NLS-1$
references.put(cmd.getAttr("id"), cmd); //$NON-NLS-1$
}
try {
cmd.exec(references);
} catch (Exception e) {
SAXException e2 = new SAXException(e.getMessage());
e2.initCause(e);
throw e2;
}
if (--tabCount < 0) {
tabCount = 0;
}
Command.prn(tabCount, tabCount + ">...<" + tagName + "> end"); //$NON-NLS-1$ //$NON-NLS-2$
}
// iterate over deferred commands and execute them again
@Override
public void endDocument() throws SAXException {
for (int i = 0; i < commands.size(); ++i) {
Command cmd = commands.elementAt(i);
try {
cmd.backtrack(references);
} catch (Exception e) {
throw new SAXException(Messages.getString("beans.0B")); //$NON-NLS-1$
}
// if(!backtracked)
// throw new SAXException("Command " + cmd.getTagName() +
// " is unresolved on second run() call.");
}
for (int i = 0; i < commands.size(); ++i) {
Command cmd = commands.elementAt(i);
result.add(cmd.getResultValue());
}
}
}