Grid.java

/**
 * This program 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 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 Lesser General Public License
 *  along with this program.  If not, see <http://www.gnu.org/licenses/>.
 * 
 * @author Arne Kepp, OpenGeo, Copyright 2009
 */
package org.geowebcache.grid;

import java.io.Serializable;

/**
 * @author groldan
 * 
 */
public class Grid implements Serializable, Cloneable {

    private static final long serialVersionUID = 1L;

    private long numTilesWide;

    private long numTilesHigh;

    private double resolution;

    private double scaleDenom;

    private String name;

    @Override
    public boolean equals(Object obj) {
        if (!(obj instanceof Grid))
            return false;

        Grid other = (Grid) obj;

        if (numTilesWide != other.numTilesWide)
            return false;

        if (numTilesHigh != other.numTilesHigh)
            return false;

        if (Math.abs(other.resolution - resolution) / Math.abs(other.resolution + resolution) > 0.005)
            return false;

        return true;
    }

    public String getName() {
        return name;
    }

    public double getScaleDenominator() {
        return scaleDenom;
    }

    /**
     * @return the resolution
     */
    public double getResolution() {
        return resolution;
    }

    /**
     * @param resolution
     *            the resolution to set
     */
    public void setResolution(double resolution) {
        this.resolution = resolution;
    }

    /**
     * @param scaleDenom
     *            the scaleDenom to set
     */
    public void setScaleDenominator(double scaleDenom) {
        this.scaleDenom = scaleDenom;
    }

    /**
     * @param name
     *            the name to set
     */
    public void setName(String name) {
        this.name = name;
    }

    /**
     * @return the numTilesWide
     */
    public long getNumTilesWide() {
        return numTilesWide;
    }

    /**
     * @param numTilesWide
     *            the numTilesWide to set
     */
    public void setNumTilesWide(long numTilesWide) {
        this.numTilesWide = numTilesWide;
    }

    /**
     * @return the numTilesHigh
     */
    public long getNumTilesHigh() {
        return numTilesHigh;
    }

    /**
     * @param numTilesHigh
     *            the numTilesHigh to set
     */
    public void setNumTilesHigh(long numTilesHigh) {
        this.numTilesHigh = numTilesHigh;
    }

    @Override
    public String toString() {
        return new StringBuilder(getClass().getSimpleName()).append("[name: '").append(name)
                .append("', resolution: ").append(resolution).append(", scale denom: ")
                .append(scaleDenom).append(", grid extent: ").append(numTilesWide).append(" x ")
                .append(numTilesHigh).append("]").toString();
    }

    @Override
    public Grid clone() {
        Grid clon;
        try {
            clon = (Grid) super.clone();
        } catch (CloneNotSupportedException e) {
            throw new RuntimeException(e);
        }
        return clon;
    }
}