com.google.gwt.json.client.JSONNumber.java Source code

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Here is the source code for com.google.gwt.json.client.JSONNumber.java

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/*
 * 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;

/**
 * Represents a JSON number. Numbers are represented by <code>double</code>s.
 */
public class JSONNumber extends JSONValue {

    /**
     * Called from {@link #getUnwrapper()}. 
     */
    private static double unwrap(JSONNumber value) {
        return value.value;
    }

    private double value;

    /**
     * Creates a new JSONNumber from the double value.
     */
    public JSONNumber(double value) {
        this.value = value;
    }

    /**
     * Gets the double value this JSONNumber represents.
     */
    public double doubleValue() {
        return value;
    }

    @Override
    public boolean equals(Object other) {
        if (!(other instanceof JSONNumber)) {
            return false;
        }
        return value == ((JSONNumber) other).value;
    }

    /**
     * Gets the double value this JSONNumber represents.
     * 
     * @deprecated See {@link #doubleValue()}
     */
    @Deprecated
    public double getValue() {
        return value;
    }

    @Override
    public int hashCode() {
        // Just use the underlying double's hashCode.
        return Double.valueOf(value).hashCode();
    }

    /**
     * Returns <code>this</code>, as this is a JSONNumber.
     */
    @Override
    public JSONNumber isNumber() {
        return this;
    }

    /**
     * Returns the JSON representation of this number.
     */
    @Override
    public native String toString() /*-{
                                    // Use JavaScript conversion so that integral values print as integers.
                                    return this.@com.google.gwt.json.client.JSONNumber::value + "";
                                    }-*/;

    @Override
    native JavaScriptObject getUnwrapper() /*-{
                                           return @com.google.gwt.json.client.JSONNumber::unwrap(Lcom/google/gwt/json/client/JSONNumber;);
                                           }-*/;
}