org.polymap.rhei.batik.PanelIdentifier.java Source code

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Here is the source code for org.polymap.rhei.batik.PanelIdentifier.java

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/*
 * polymap.org
 * Copyright 2013, Polymap GmbH. All rights reserved.
 *
 * This is free software; you can redistribute it and/or modify it
 * under the terms of the GNU Lesser General Public License as
 * published by the Free Software Foundation; either version 3.0 of
 * the License, or (at your option) any later version.
 *
 * This software 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
 * Lesser General Public License for more details.
 */
package org.polymap.rhei.batik;

import java.util.Arrays;

import org.apache.commons.lang3.StringUtils;

import com.google.common.base.Joiner;

/**
 * Identifies an {@link IPanel}. The id can have several parts. Most significant part
 * comes first. This helps to distinguish panels of same type but with different
 * data.
 *
 * @author <a href="http://www.polymap.de">Falko Brutigam</a>
 */
public class PanelIdentifier {

    public static final String SEPARATOR = ".";

    public static PanelIdentifier parse(String id) {
        return new PanelIdentifier(StringUtils.split(id, SEPARATOR));
    }

    // instance *******************************************

    private String[] id;

    public PanelIdentifier(String... id) {
        assert id != null && id.length > 0 : "Panel ID must contain at least 2 elements.";
        this.id = id;
    }

    public String id() {
        return id[0];
    }

    public String subId() {
        return id[1];
    }

    @Override
    public int hashCode() {
        final int prime = 31;
        int result = 1;
        result = prime * result + Arrays.hashCode(id);
        return result;
    }

    @Override
    public boolean equals(Object obj) {
        if (this == obj) {
            return true;
        } else if (obj instanceof PanelIdentifier) {
            PanelIdentifier other = (PanelIdentifier) obj;
            return Arrays.equals(id, other.id);
        }
        return false;
    }

    @Override
    public String toString() {
        return Joiner.on(SEPARATOR).join(id);
    }

}