com.conwet.silbops.model.basic.Attribute.java Source code

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Here is the source code for com.conwet.silbops.model.basic.Attribute.java

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package com.conwet.silbops.model.basic;

/*
 * #%L
 * SilboPS API
 * %%
 * Copyright (C) 2011 - 2014 CoNWeT Lab., Universidad Politcnica de Madrid
 * %%
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU Affero General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 * 
 * 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 Affero General Public License
 * along with this program.  If not, see <http://www.gnu.org/licenses/>.
 * #L%
 */

import java.util.Objects;

import org.json.simple.JSONValue;

import com.conwet.silbops.util.JSONizable;

/**
 * This class model the attribute concept: a name with a type.
 * 
 * @author sergio
 */
public class Attribute implements JSONizable {

    private String name;
    private Type type;

    /**
     * Construct an attribute with the given parameters
     * @param name the name of the attribute
     * @param type the type of the attribute
     * @throws IllegalArgumentException if some of the parameters are null
     */
    public Attribute(String name, Type type) {

        this.name = Objects.requireNonNull(name, "Attribute name is null");
        this.type = Objects.requireNonNull(type, "Type is null");
    }

    @Override
    public boolean equals(Object obj) {

        if (this == obj) {
            return true;
        }

        if (obj instanceof Attribute) {

            Attribute other = (Attribute) obj;
            return type == other.type && name.equals(other.name);
        }

        return false;
    }

    @Override
    public int hashCode() {

        return 41 * type.hashCode() + name.hashCode();
    }

    /**
     * @return the attribute name
     */
    public String getName() {

        return name;
    }

    /**
     * @return the attribute type
     */
    public Type getType() {

        return type;
    }

    @Override
    public String toString() {

        return "[name=" + name + ", type=" + type + "]";
    }

    /**
     * Convert the json in an attribute object.
     * @param json the json to convert
     * @return the attribute object
     */
    public static Attribute fromJSON(String json) {

        String[] fields = json.split(":");

        return new Attribute(fields[0], Type.fromJSON(fields[1]));
    }

    @Override
    public String toJSON() {

        return name + ":" + type.toJSON();
    }

    @Override
    public String toJSONString() {

        return JSONValue.toJSONString(this.toJSON());
    }
}