/*
* 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.openjena.atlas.json.io;
import java.util.ArrayDeque ;
import java.util.Deque ;
import org.openjena.atlas.json.* ;
import org.openjena.atlas.lib.InternalErrorException ;
import org.openjena.atlas.logging.Log ;
/** Build a JSON structure */
public class JSONMaker implements JSONHandler
{
public JSONMaker() {}
private JsonValue value = null ;
private Deque<JsonArray> arrays = new ArrayDeque<JsonArray>();
private Deque<JsonObject> objects = new ArrayDeque<JsonObject>();
// The depth of this stack is the object depth.
private Deque<String> keys = new ArrayDeque<String>();
public JsonValue jsonValue()
{
return value ;
}
@Override
public void startParse(long currLine, long currCol)
{}
@Override
public void finishParse(long currLine, long currCol)
{}
@Override
public void startObject(long currLine, long currCol)
{
objects.push(new JsonObject()) ;
}
@Override
public void finishObject(long currLine, long currCol)
{
value = objects.pop() ;
}
@Override
public void startArray(long currLine, long currCol)
{
arrays.push(new JsonArray()) ;
}
@Override
public void element(long currLine, long currCol)
{
arrays.peek().add(value) ;
value = null ;
}
@Override
public void finishArray(long currLine, long currCol)
{
value = arrays.pop() ;
}
@Override
public void startPair(long currLine, long currCol)
{
}
@Override
public void keyPair(long currLine, long currCol)
{
keys.push(value.getAsString().value()) ;
}
@Override
public void finishPair(long currLine, long currCol)
{
if ( value == null )
throw new InternalErrorException("null for 'value' (bad finishPair() allignment)") ;
String k = keys.pop();
JsonObject obj = objects.peek() ;
if ( obj.hasKey(k) )
Log.warn("JSON", "Duplicate key '"+k+"' for object ["+currLine+","+currCol+"]") ;
obj.put(k, value) ;
value = null ;
}
@Override
public void valueBoolean(boolean b, long currLine, long currCol)
{
value = new JsonBoolean(b) ;
}
@Override
public void valueDecimal(String image, long currLine, long currCol)
{
value = JsonNumber.valueDecimal(image) ;
}
@Override
public void valueDouble(String image, long currLine, long currCol)
{
value = JsonNumber.valueDouble(image) ;
}
@Override
public void valueInteger(String image, long currLine, long currCol)
{
value = JsonNumber.valueInteger(image) ;
}
@Override
public void valueNull(long currLine, long currCol)
{
value = JsonNull.instance ;
}
@Override
public void valueString(String image, long currLine, long currCol)
{
value = new JsonString(image) ;
}
}