com.google.gwt.json.client.JSONValue Maven / Gradle / Ivy
/*
* Copyright 2008 Google Inc.
*
* Licensed 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 com.google.gwt.json.client;
import com.google.gwt.core.client.JavaScriptObject;
/**
* The superclass of all JSON value types.
*
* @see com.google.gwt.json.client.JSONArray
* @see com.google.gwt.json.client.JSONBoolean
* @see com.google.gwt.json.client.JSONNumber
* @see com.google.gwt.json.client.JSONObject
* @see com.google.gwt.json.client.JSONString
*/
public abstract class JSONValue {
/**
* Not subclassable outside this package.
*/
JSONValue() {
}
/**
* Returns a non-null reference if this JSONValue is really a JSONArray.
*
* @return a reference to a JSONArray if this JSONValue is a JSONArray or
* null otherwise.
*/
public JSONArray isArray() {
return null;
}
/**
* Returns a non-null reference if this JSONValue is really a JSONBoolean.
*
* @return a reference to a JSONBoolean if this JSONValue is a JSONBoolean or
* null otherwise.
*/
public JSONBoolean isBoolean() {
return null;
}
/**
* Returns a non-null reference if this JSONValue is really a JSONNull.
*
* @return a reference to a JSONNull if this JSONValue is a JSONNull or
* null otherwise.
*/
public JSONNull isNull() {
return null;
}
/**
* Returns a non-null reference if this JSONValue is really a JSONNumber.
*
* @return a reference to a JSONNumber if this JSONValue is a JSONNumber or
* null otherwise.
*/
public JSONNumber isNumber() {
return null;
}
/**
* Returns non-null if this JSONValue is really a JSONObject.
*
* @return a reference to a JSONObject if this JSONValue is a JSONObject or
* null otherwise.
*/
public JSONObject isObject() {
return null;
}
/**
* Returns a non-null reference if this JSONValue is really a JSONString.
*
* @return a reference to a JSONString if this JSONValue is a JSONString or
* null otherwise.
*/
public JSONString isString() {
return null;
}
/**
* Returns a JSON-encoded string for this entity. Use this method to create
* JSON strings that can be sent from the client to a server.
*/
@Override
public abstract String toString();
/**
* Internal. Returns a JS func that can unwrap this value. Used from native
* code.
*/
abstract JavaScriptObject getUnwrapper();
}