/*
* JBoss, Home of Professional Open Source.
* See the COPYRIGHT.txt file distributed with this work for information
* regarding copyright ownership. Some portions may be licensed
* to Red Hat, Inc. under one or more contributor license agreements.
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
* 02110-1301 USA.
*/
package org.teiid.json.simple;
import java.io.IOException;
import java.util.ArrayList;
import java.util.LinkedHashMap;
import java.util.List;
import java.util.Map;
import java.util.Stack;
public class SimpleContentHandler implements ContentHandler {
private Stack<Object> stack = new Stack<Object>();
private Stack<String> nameStack = new Stack<String>();
private Object result;
@Override
public void startJSON() throws ParseException, IOException {
}
@Override
public void endJSON() throws ParseException, IOException {
}
@Override
public boolean startObject() throws ParseException, IOException {
Map<String, Object> current = new LinkedHashMap<String, Object>();
stack.add(current);
return true;
}
@Override
public boolean endObject() throws ParseException, IOException {
end(stack.pop());
return true;
}
private void end(Object current) {
if (!stack.isEmpty() && stack.lastElement() instanceof List) {
((List)stack.lastElement()).add(current);
} else {
result = current;
}
}
@Override
public boolean startObjectEntry(String key) throws ParseException,
IOException {
nameStack.push(key);
return true;
}
@Override
public boolean endObjectEntry() throws ParseException, IOException {
Object parent = stack.lastElement();
((Map<String, Object>)parent).put(nameStack.pop(), result);
return true;
}
@Override
public boolean startArray() throws ParseException, IOException {
List<Object> current = new ArrayList<Object>();
stack.add(current);
return true;
}
@Override
public boolean endArray() throws ParseException, IOException {
end(stack.pop());
return true;
}
@Override
public boolean primitive(Object value) throws ParseException, IOException {
end(value);
return true;
}
public Object getResult() {
return result;
}
}