/*
* Geotoolkit - An Open Source Java GIS Toolkit
* http://www.geotoolkit.org
*
* (C) 2008 - 2011, Geomatys
*
* This library 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 2.1 of the License, or (at your option) any later version.
*
* This library 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.geotoolkit.style;
import java.util.Arrays;
import java.util.Objects;
import org.geotoolkit.util.StringUtilities;
import org.opengis.style.ChannelSelection;
import org.opengis.style.SelectedChannelType;
import org.opengis.style.StyleVisitor;
import static org.apache.sis.util.ArgumentChecks.*;
/**
* Immutable implementation of Types ChannelSelection.
*
* @author Johann Sorel (Geomatys)
* @module
*/
public class DefaultChannelSelection implements ChannelSelection{
private final SelectedChannelType[] rgb;
private final SelectedChannelType gray;
/**
* Create a default immutable channel selection.
*
*/
public DefaultChannelSelection(final SelectedChannelType red, final SelectedChannelType green, final SelectedChannelType blue){
rgb = new SelectedChannelType[3];
rgb[0] = red;
rgb[1] = green;
rgb[2] = blue;
this.gray = null;
}
/**
* Create a default immutable channel selection.
*
* @param gray : can not be null
*/
DefaultChannelSelection(final SelectedChannelType gray){
ensureNonNull("gray channel", gray);
this.gray = gray;
this.rgb = null;
}
/**
* {@inheritDoc }
*/
@Override
public SelectedChannelType[] getRGBChannels() {
if(rgb != null) return rgb.clone();
else return null;
}
/**
* {@inheritDoc }
*/
@Override
public SelectedChannelType getGrayChannel() {
return gray;
}
/**
* {@inheritDoc }
*/
@Override
public Object accept(final StyleVisitor visitor, final Object extraData) {
return visitor.visit(this,extraData);
}
/**
* {@inheritDoc }
*/
@Override
public boolean equals(final Object obj) {
if(this == obj){
return true;
}
if(obj == null || !this.getClass().equals(obj.getClass()) ){
return false;
}
DefaultChannelSelection other = (DefaultChannelSelection) obj;
return Objects.equals(this.gray,other.gray)
&& Arrays.equals(this.rgb, other.rgb);
}
/**
* {@inheritDoc }
*/
@Override
public int hashCode() {
if(rgb != null) return 17*rgb.hashCode();
else return 17*gray.hashCode();
}
/**
* {@inheritDoc }
*/
@Override
public String toString() {
final StringBuilder builder = new StringBuilder();
builder.append("[ChannelSelection : ");
if(rgb != null){
builder.append(" RGB=");
builder.append(StringUtilities.toStringTree((Object[])rgb));
}else if(gray != null){
builder.append(" GRAY=");
builder.append(gray);
}
builder.append("]");
return builder.toString();
}
}