/*
* 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.jena.atlas.json;
import org.apache.jena.atlas.io.IndentedWriter ;
import org.apache.jena.atlas.json.io.JSWriter ;
public class JsonAccess
{
public static JsonValue accessPath(JsonValue obj, String ... path)
{
for ( String p : path )
{
if ( !obj.isObject() )
{
throw new JsonException( "Path traverses non-object" );
}
obj = obj.getAsObject().get( p );
}
return obj ;
}
public static JsonValue access(JsonValue obj, Object ... path)
{
for ( Object p : path )
{
if ( p instanceof String )
{
if ( !obj.isObject() )
{
throw new JsonException( "Path traverses non-object" );
}
obj = obj.getAsObject().get( (String) p );
}
if ( p instanceof Integer )
{
if ( !obj.isArray() )
{
throw new JsonException( "Path traverses non-array" );
}
obj = obj.getAsArray().get( (Integer) p );
}
}
return obj ;
}
public static void main(String... args)
{
if ( false )
{
JSWriter w = new JSWriter() ;
w.startOutput() ;
w.startObject() ;
w.pair("key1", "value1") ;
w.key("key2") ;
w.startArray() ;
w.arrayElement("x") ;
w.arrayElement("y") ;
w.finishArray() ;
w.key("key3") ;
w.startObject() ;
w.pair("key4", "value4") ;
w.finishObject() ;
w.finishObject() ;
w.finishOutput() ;
//System.exit(0) ;
}
if ( false )
{
JsonValue obj = JSON.read("data.json") ;
obj.output(IndentedWriter.stdout) ;
System.out.println() ;
System.out.println("OK") ;
}
if ( true )
{
JsonObject obj = new JsonObject() ;
obj.put("x1", new JsonString("y")) ;
obj.put("x2", JsonNumber.value(56)) ;
obj.put("x2", JsonNumber.value(56)) ;
JsonArray a = new JsonArray() ;
a.add(JsonNumber.value(5)) ;
a.add(new JsonBoolean(true)) ;
a.add(new JsonBoolean(false)) ;
obj.put("array", a) ;
a = new JsonArray() ;
a.add(JsonNumber.value(5)) ;
obj.put("array2", a) ;
obj.output(IndentedWriter.stdout) ;
System.out.println() ;
System.out.println(access(obj, "x1")) ;
}
//IndentedWriter.stdout.flush();
}
}