com.github.haixing_hu.data.model.common.Language.java Source code

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Here is the source code for com.github.haixing_hu.data.model.common.Language.java

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/*
 * Copyright (c) 2014  Haixing Hu
 *
 * 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.github.haixing_hu.data.model.common;

import javax.annotation.Nullable;
import javax.xml.bind.annotation.XmlAccessType;
import javax.xml.bind.annotation.XmlAccessorType;
import javax.xml.bind.annotation.XmlElement;
import javax.xml.bind.annotation.XmlRootElement;

import org.apache.commons.lang3.StringUtils;
import org.apache.commons.lang3.builder.EqualsBuilder;
import org.apache.commons.lang3.builder.HashCodeBuilder;
import org.apache.commons.lang3.builder.ToStringBuilder;

import static com.github.haixing_hu.lang.Argument.requireNonNull;

/**
 * A {@link Language} represents a language. It's a value object.
 *
 * @author Haixing Hu
 */
@XmlAccessorType(XmlAccessType.FIELD)
@XmlRootElement(name = "language")
public final class Language {

    @XmlElement(required = true)
    private String code;

    @XmlElement(required = true)
    private String name;

    @XmlElement(required = false)
    private String abbreviation;

    @XmlElement(required = false)
    private String description;

    /**
     * Constructs an empty {@link Language}.
     */
    public Language() {
        code = StringUtils.EMPTY;
        name = StringUtils.EMPTY;
        abbreviation = null;
        description = null;
    }

    /**
     * Constructs a language.
     *
     * @param code
     *          the ISO 639-2 code of the language.
     * @param name
     *          the name of the language.
     */
    public Language(final String code, final String name) {
        this.code = requireNonNull("code", code);
        this.name = requireNonNull("name", name);
        abbreviation = null;
        description = null;
    }

    /**
     * Constructs a language.
     *
     * @param code
     *          the ISO 639-2 code of the language.
     * @param name
     *          the name of the language.
     * @param abbreviation
     *          the abbreviation of the language, or {@code null} if it has none.
     * @param description
     *          the description of the language, or {@code null} if it has none.
     */
    public Language(final String code, final String name, @Nullable final String abbreviation,
            @Nullable final String description) {
        this.code = requireNonNull("code", code);
        this.name = requireNonNull("name", name);
        this.abbreviation = abbreviation;
        this.description = description;
    }

    /**
     * Gets the ISO 639-2 code of this language.
     *
     * @return the ISO 639-2 code of this language.
     */
    public String getCode() {
        return code;
    }

    /**
     * Sets the ISO 639-2 code of this language.
     *
     * @param code
     *          the new ISO 639-2 code to set.
     */
    public void setCode(final String code) {
        this.code = requireNonNull("code", code);
    }

    /**
     * Gets the name of this language.
     *
     * @return the name of this language.
     */
    public String getName() {
        return name;
    }

    /**
     * Sets the name of this language.
     *
     * @param name
     *          the new name to set.
     */
    public void setName(final String name) {
        this.name = requireNonNull("name", name);
    }

    /**
     * Gets the abbreviation of this language.
     *
     * @return the abbreviation of the language, or {@code null} if it has none.
     */
    public String getAbbreviation() {
        return abbreviation;
    }

    /**
     * Sets the abbreviation of this language.
     *
     * @param abbreviation
     *          the new abbreviation to set, or {@code null} to set none.
     */
    public void setAbbreviation(@Nullable final String abbreviation) {
        this.abbreviation = abbreviation;
    }

    /**
     * Gets the description of this language.
     *
     * @return the description of the language, or {@code null} if it has none.
     */
    public String getDescription() {
        return description;
    }

    /**
     * Sets the description of this language.
     *
     * @param description
     *          the new description to set, or {@code null} to set none.
     */
    public void setDescription(@Nullable final String description) {
        this.description = description;
    }

    @Override
    public int hashCode() {
        return new HashCodeBuilder(17, 2).append(code).append(name).append(abbreviation).append(description)
                .build();
    }

    @Override
    public boolean equals(final Object obj) {
        if (obj == null) {
            return false;
        }
        if (obj == this) {
            return true;
        }
        if (obj.getClass() != getClass()) {
            return false;
        }
        final Language rhs = (Language) obj;
        return new EqualsBuilder().append(code, rhs.code).append(name, rhs.name)
                .append(abbreviation, rhs.abbreviation).append(description, rhs.description).build();
    }

    @Override
    public String toString() {
        return new ToStringBuilder(this).append("code", code).append("name", name)
                .append("abbreviation", abbreviation).append("description", description).toString();
    }
}