/*
* 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;
import org.openjena.atlas.io.IndentedLineBuffer ;
import org.openjena.atlas.io.IndentedWriter ;
import org.openjena.atlas.io.Printable ;
import org.openjena.atlas.json.io.JsonWriter ;
public abstract class JsonValue implements Printable
{
// Called a "Value" in the JSON spec
// Called Element in gson.
public boolean isObject() { return false ; }
public JsonObject getAsObject() { throw new JsonException("Not a JSON object") ; }
public boolean isArray() { return this instanceof JsonArray ; }
public JsonArray getAsArray() { throw new JsonException("Not a JSON array") ; }
public boolean isPrimitive() { return isString() || isNumber() || isBoolean() || isNull() ; }
public boolean isNull() { return false ; }
public boolean isNumber() { return false ; }
public JsonNumber getAsNumber() { throw new JsonException("Not a JSON number") ; }
public boolean isString() { return false ; }
public JsonString getAsString() { throw new JsonException("Not a JSON string") ; }
public boolean isBoolean() { return false ; }
public JsonBoolean getAsBoolean() { throw new JsonException("Not a JSON boolean") ; }
@Override public abstract int hashCode() ;
@Override public abstract boolean equals(Object other) ;
public abstract void visit(JsonVisitor visitor) ;
@Override
public String toString()
{
IndentedLineBuffer buff = new IndentedLineBuffer() ;
output(buff) ;
return buff.asString() ;
}
@Override
public void output(IndentedWriter out)
{
JsonWriter w = new JsonWriter(out) ;
w.startOutput() ;
this.visit(w) ;
w.finishOutput() ;
}
}