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

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Here is the source code for com.google.gwt.json.client.JSONString.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;
import com.google.gwt.core.client.JsonUtils;

/**
 * Represents a JSON string.
 */
public class JSONString extends JSONValue {

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

    private String value;

    /**
     * Creates a new JSONString from the supplied String.
     * 
     * @param value a String value
     * @throws NullPointerException if <code>value</code> is <code>null</code>
     */
    public JSONString(String value) {
        if (value == null) {
            throw new NullPointerException();
        }
        this.value = value;
    }

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

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

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

    /**
     * Returns the raw Java string value of this item.
     */
    public String stringValue() {
        return value;
    }

    /**
     * Returns the JSON formatted value of this string, quoted for evaluating in a
     * JavaScript interpreter.
     */
    @Override
    public String toString() {
        return JsonUtils.escapeValue(value);
    }

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