/*
* JBoss, Home of Professional Open Source.
* Copyright 2006, Red Hat Middleware LLC, and individual contributors
* as indicated by the @author tags. See the copyright.txt file in the
* distribution for a full listing of individual contributors.
*
* This 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 software 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 software; if not, write to the Free
* Software Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
* 02110-1301 USA, or see the FSF site: http://www.fsf.org.
*/
package org.jboss.bpm.console.client.util;
import com.google.gwt.json.client.JSONArray;
import com.google.gwt.json.client.JSONException;
import com.google.gwt.json.client.JSONObject;
import com.google.gwt.json.client.JSONValue;
import org.jboss.bpm.console.client.model.util.SimpleDateFormat;
import java.util.Date;
import java.util.Iterator;
import java.util.Set;
/**
* @author Heiko.Braun <heiko.braun@jboss.com>
*/
public class JSONWalk
{
private JSONValue root;
private JSONWalk(JSONValue root)
{
this.root = root;
}
public static JSONWalk on(JSONValue root)
{
return new JSONWalk(root);
}
public JSONWrapper next(String name)
{
if (null == root || root.isObject() == null) return null;
JSONObject rootObject = root.isObject();
JSONWrapper match = null;
Set<String> keySet = rootObject.keySet();
Iterator it = keySet.iterator();
while (it.hasNext())
{
String s = (String) it.next();
JSONValue child = rootObject.get(s);
if (name.equals(s))
{
match = new JSONWrapper(child);
break;
}
else
{
match = JSONWalk.on(child).next(name);
}
}
return match;
}
public class JSONWrapper
{
private JSONValue value;
public JSONWrapper(JSONValue value)
{
this.value = value;
}
public int asInt()
{
if (value.isNumber() != null)
{
return new Double(value.isNumber().getValue()).intValue();
}
else
{
throw new IllegalArgumentException("Not a number: " + value);
}
}
public long asLong()
{
if (value.isNumber() != null)
{
return new Double(value.isNumber().getValue()).longValue();
}
else
{
throw new IllegalArgumentException("Not a number: " + value);
}
}
public double asDouble()
{
if (value.isNumber() != null)
{
return value.isNumber().getValue();
}
else
{
throw new IllegalArgumentException("Not a number: " + value);
}
}
public String asString()
{
if (value.isString() != null)
{
return value.isString().stringValue();
}
else
{
throw new IllegalArgumentException("Not a string: " + value);
}
}
public boolean asBool()
{
if (value.isBoolean() != null)
{
return value.isBoolean().booleanValue();
}
else
{
throw new IllegalArgumentException("Not a boolean: " + value);
}
}
public Date asDate()
{
if (value.isString() != null)
{
SimpleDateFormat df = new SimpleDateFormat();
return df.parse(value.isString().stringValue());
}
else
{
throw new IllegalArgumentException("Not a date string: " + value);
}
}
public JSONArray asArray()
{
if (value.isArray() != null)
{
return value.isArray();
}
else
{
throw new IllegalArgumentException("Not a number: " + value);
}
}
public JSONObject asObject()
{
if (value.isObject() != null)
{
return value.isObject();
}
else
{
throw new IllegalArgumentException("Not an object: " + value);
}
}
public String toString() throws JSONException
{
return value.toString();
}
}
}