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An implementation of Java JSON Parser

There is a newer version: 0.2.1

/*
 *  Copyright (C) 2020 Takashi Nakamoto .
 *
 *  This program is free software: you can redistribute it and/or modify
 *  it under the terms of the GNU General Public License version 3 as
 *  published by the Free Software Foundation.
 *
 *  This program is distributed in the hope that it will be useful,
 *  but WITHOUT ANY WARRANTY; without even the implied warranty of
 *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 *  GNU General Public License for more details.
 *
 *  You should have received a copy of the GNU General Public License
 *  along with this program.  If not, see .
 */

package com.github.tnakamot.jscdg.json.value;

import com.github.tnakamot.jscdg.json.token.JSONTokenString;

/**
 * Represents one JSON 'string' value.
 *
 * 
 * Instances of this class are immutable.
 */
public class JSONValueString extends JSONValuePrimitive {
    private final String value;

    /**
     * Create an instance of a Java representation of a JSON string value.
     *
     * @param value value represented by a Java {@link String} object of this
     *              JSON string value. Null is considered as an empty string.
     */
    public JSONValueString(String value) {
        super(JSONValueType.STRING, null);
        this.value = (value == null) ? "" : value;
    }

    /**
     * Create an instance of a Java representation of a JSON string value
     * from a JSON string token.
     *
     * @param token source token of this JSON string value.
     */
    public JSONValueString(JSONTokenString token) {
        super(JSONValueType.STRING, token);
        this.value = token.value();
    }

    /**
     * Return the value represented by a Java {@link String} object of this
     * JSON string value.
     *
     * @return value represented by a Java {@link String} object of this JSON
     *               string value. Never be null.
     */
    public String value() {
        return value;
    }

    @Override
    public boolean equals(Object obj) {
        if (obj instanceof JSONValueString) {
            JSONValueString v = (JSONValueString) obj;
            return this.value.equals(v.value);
        } else {
            return false;
        }
    }

    @Override
    public int hashCode() {
        return value.hashCode();
    }

    @Override
    public String toString() {
        return value;
    }
}