root / trunk / libraries / libRaster / src / org / gvsig / raster / datastruct / TransparencyRange.java @ 17782
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/* gvSIG. Sistema de Informaci?n Geogr?fica de la Generalitat Valenciana
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*
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* Copyright (C) 2006 IVER T.I. and Generalitat Valenciana.
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version 2
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* of the License, or (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307,USA.
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*/
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package org.gvsig.raster.datastruct; |
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import java.io.IOException; |
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import java.util.Arrays; |
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import org.gvsig.raster.dataset.RasterDataset; |
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/**
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* Clase que representa a un conjunto de pixeles con transparencia. Incluye los
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* rangos de transparencia para cada banda, la cadena que va en la lista y la
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* operaci?n que se realiza entre ellos. Un And significa que ser?n
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* transparentes todos los pixeles que cumplan con R con G y con B. Un Or
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* significar? que tendr?n transparencia todos los pixeles que cumplan con R con
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* G o con B.
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*
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* @author Nacho Brodin (nachobrodin@gmail.com)
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*/
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public class TransparencyRange implements Cloneable { |
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private String strEntry = null; |
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private int[] red = null; |
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private int[] green = null; |
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private int[] blue = null; |
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private boolean and = true; |
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private int alpha = 0; |
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/**
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* Constructor
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*/
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public TransparencyRange() {
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} |
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/**
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* Crea un objeto TransparencyRange a partir de una cadena bien formada
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* @param value cadena bien formada que representa un intervalo
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*/
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public TransparencyRange(String value) { |
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try {
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red = new int[2]; |
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green = new int[2]; |
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blue = new int[2]; |
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and = TransparencyRange.stringToInterval(value, red, green, blue); |
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strEntry = value; |
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} catch (IOException e) { |
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// Cadena mal formada
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} |
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} |
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/**
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* Obtiene la operaci?n utilizada
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* @param and Si es true significa que se usa un AND y false implica
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* que se usa un OR
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*/
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public boolean isAnd() { |
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return and;
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} |
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/**
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* Asigna la operaci?n AND como la utilizada
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* @param and booleano que si est? a true significa que el la operaci?n
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* AND es la utilizada como operaci?n.
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*/
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public void setAnd(boolean and) { |
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this.and = and;
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} |
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/**
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* Obtiene el intervalo de valores correspondiente a la banda del azul
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* @return Array bidimensional de enteros correspondiente a la banda del azul
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*/
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public int[] getBlue() { |
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return blue;
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} |
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/**
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* Asigna los intervalos de valores correspondientes a las bandas del
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* rojo, azul y verde
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* @param red Array bidimensional de enteros correspondiente a la banda del rojo
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* @param green Array bidimensional de enteros correspondiente a la banda del verde
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* @param blue Array bidimensional de enteros correspondiente a la banda del azul
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*/
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public void setRGB(int[] red, int[] green, int[] blue) { |
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this.red = red;
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this.green = green;
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this.blue = blue;
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} |
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/**
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* Asigna el intervalo de valores correspondiente a la banda del azul
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* @param blue Array bidimensional de enteros correspondiente a la banda del azul
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*/
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public void setBlue(int[] blue) { |
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this.blue = blue;
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} |
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/**
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* Obtiene el intervalo de valores correspondiente a la banda del verde
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* @return Array bidimensional de enteros correspondiente a la banda del verde
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*/
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public int[] getGreen() { |
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return green;
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} |
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/**
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* Asigna el intervalo de valores correspondiente a la banda del verde
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* @param green Array bidimensional de enteros correspondiente a la banda del verde
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*/
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public void setGreen(int[] green) { |
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this.green = green;
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} |
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/**
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* Obtiene el intervalo de valores correspondiente a la banda del rojo
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* @return Array bidimensional de enteros correspondiente a la banda del rojo
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*/
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public int[] getRed() { |
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return red;
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} |
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/**
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* Asigna el intervalo de valores correspondiente a la banda del rojo
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* @param red Array bidimensional de enteros correspondiente a la banda del rojo
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*/
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public void setRed(int[] red) { |
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this.red = red;
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} |
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/**
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* Obtiene la cadena que representa una entrada en la tabla.
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* @return Cadena que representa una entrada en la tabla
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*/
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public String getStrEntry() { |
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return strEntry;
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} |
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/**
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* Asigna la cadena que representa una entrada en la tabla.
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* @param strEntry Cadena que representa una entrada en la tabla.
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*/
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public void setStrEntry(String strEntry) { |
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this.strEntry = strEntry;
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} |
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/**
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* Esta funci?n valida la cadena de entrada por medio de una m?quina de estados. Valida las
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* siguientes posibilidades en la cadena de entrada:
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* <LI>
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* <UL>(valor_rojo) & (Valor_verde) & (Valor_azul)</UL>
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* <UL>(valor_rojo) | (Valor_verde) | (Valor_azul)</UL>
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* </LI>
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* Despues de la validaci?n parsea el contenido y carga los par?metros r,g,b con los
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* intervalos de valores. Estos par?metros deben ser pasados como arrays de enteros de
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* dos elementos.
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* @param values
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* @param r Intervalo de rojo
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* @param g Intervalo de verde
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* @param b Intervalo de azul
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* @return Devuelve true si la operaci?n usada en los intervalos es un AND y false si es un OR
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*/
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public static boolean stringToInterval(String values, int[] r, int[] g, int[] b) throws IOException { |
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int status = 0; |
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int countAnd = 0, countOr = 0; |
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boolean and = true; |
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for (int i = 0; i < values.length(); i++) { |
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char c = values.charAt(i);
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switch (status) {
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case 0: |
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if (c == ' ') |
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status = 0;
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else if ((c >= 48 && c <= 57) || c == '*') |
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status = 1;
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else
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status = 4;
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break;
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case 1: |
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if ((c >= 48 && c <= 57) || (c == ' ')) |
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status = 1;
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else if (c == ':') |
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status = 2;
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else if (c == '&') { |
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status = 0;
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countAnd++; |
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} else if (c == '|') { |
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status = 0;
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countOr++; |
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} else
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status = 4;
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break;
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case 2: |
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if (c >= 48 && c <= 57) |
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status = 3;
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else
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status = 4;
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break;
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case 3: |
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if ((c >= 48 && c <= 57) || (c == ' ')) |
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status = 3;
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else if (c == '&') { |
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status = 0;
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countAnd++; |
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} else if (c == '|') { |
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status = 0;
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countOr++; |
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} else
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status = 4;
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break;
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case 4: |
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throw new IOException("Error en la cadena de entrada " + status); |
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} |
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} |
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// Si el analisis es correcto parseamos
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if ((status == 1 || status == 3) && ((countAnd == 2 && countOr == 0) || (countAnd == 0 && countOr == 2))) { |
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String[] s = values.split(" & "); |
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if (s.length < 3) { |
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s = values.split(" \\| ");
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and = false;
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} |
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; |
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String[] val = s[0].split(":"); |
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try {
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r[0] = Integer.parseInt(val[0]); |
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if (val.length == 2) |
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r[1] = Integer.parseInt(val[1]); |
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else
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r[1] = Integer.parseInt(val[0]); |
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} catch (NumberFormatException e) { |
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r[0] = -1; |
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r[1] = -1; |
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} |
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val = s[1].split(":"); |
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try {
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g[0] = Integer.parseInt(val[0]); |
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if (val.length == 2) |
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g[1] = Integer.parseInt(val[1]); |
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else
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g[1] = Integer.parseInt(val[0]); |
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} catch (NumberFormatException e) { |
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g[0] = -1; |
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g[1] = -1; |
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} |
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val = s[2].split(":"); |
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try {
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b[0] = Integer.parseInt(val[0]); |
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if (val.length == 2) |
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b[1] = Integer.parseInt(val[1]); |
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else
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b[1] = Integer.parseInt(val[0]); |
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} catch (NumberFormatException e) { |
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b[0] = -1; |
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b[1] = -1; |
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} |
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} else
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throw new IOException("Error en la cadena de entrada "); |
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return and;
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} |
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/**
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* Carga la cadena StrEntry leyendo los valores en los vectores que representa los intervalos.
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*/
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public void loadStrEntryFromValues(){ |
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String separator = " | "; |
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if (and)
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separator = " & ";
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strEntry = String.valueOf(red[0] + separator+ green[0] + separator + blue[0]); |
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} |
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/**
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* Obtiene el alpha asociado al rango. Por defecto es de 0, es decir
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* totalmente transparente pero puede asociarsele un valor distinto
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* @return Alpha asociado
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*/
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public int getAlpha() { |
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return alpha;
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} |
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/**
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* Asigna el alpha asociado al rango. Por defecto es de 0, es decir
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* totalmente transparente pero puede asociarsele un valor distinto
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* @param alpha asociado
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*/
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public void setAlpha(int alpha) { |
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this.alpha = alpha;
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} |
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/**
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* Realiza la uni?n entre el intervalo actual y el pasado por par?metro
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* @param interval intervalo pasado
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* @param rgb
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* @return union de intervalos
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*/
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public int[] union(int[] interval, int rgb) { |
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switch (rgb) {
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case RasterDataset.RED_BAND:
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if ((red[1] >= interval[0] && red[0] <= interval[0]) || (red[0] <= interval[1] && red[0] >= interval[0])) |
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return new int[] { Math.min(red[0], interval[0]), Math.max(red[1], interval[1]) }; |
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case RasterDataset.GREEN_BAND:
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if ((green[1] >= interval[0] && green[0] <= interval[0]) || (green[0] <= interval[1] && green[0] >= interval[0])) |
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return new int[] { Math.min(green[0], interval[0]), Math.max(green[1], interval[1]) }; |
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case RasterDataset.BLUE_BAND:
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if ((blue[1] >= interval[0] && blue[0] <= interval[0]) || (blue[0] <= interval[1] && blue[0] >= interval[0])) |
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return new int[] { Math.min(blue[0], interval[0]), Math.max(blue[1], interval[1]) }; |
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} |
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return null; |
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} |
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/**
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* Muestra los datos del objeto para depuraci?n.
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*/
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public void show(){ |
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if (getRed() != null) |
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System.out.println(getRed()[0] + " " + getRed()[1]); |
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if (getGreen() != null) |
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System.out.println(getGreen()[0] + " " + getGreen()[1]); |
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if (getBlue() != null) |
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System.out.println(getBlue()[0] + " " + getBlue()[1]); |
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System.out.println(isAnd());
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System.out.println(getStrEntry());
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System.out.println("--------------------"); |
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} |
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/*
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* (non-Javadoc)
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* @see java.lang.Object#clone()
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*/
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public Object clone() { |
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TransparencyRange clone = null;
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try {
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clone = (TransparencyRange) super.clone();
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} catch (CloneNotSupportedException e) { |
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} |
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if (strEntry != null) |
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clone.strEntry = new String(strEntry); |
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if (red != null) |
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clone.red = (int[]) red.clone(); |
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if (green != null) |
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clone.green = (int[]) green.clone(); |
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if (blue != null) |
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clone.blue = (int[]) blue.clone(); |
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return clone;
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} |
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public int hashCode() { |
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final int PRIME = 31; |
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int result = 1; |
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result = PRIME * result + alpha; |
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result = PRIME * result + (and ? 1231 : 1237); |
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result = PRIME * result + TransparencyRange.hashCode(blue); |
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result = PRIME * result + TransparencyRange.hashCode(green); |
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result = PRIME * result + TransparencyRange.hashCode(red); |
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result = PRIME * result + ((strEntry == null) ? 0 : strEntry.hashCode()); |
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return result;
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} |
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private static int hashCode(int[] array) { |
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final int PRIME = 31; |
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if (array == null) |
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return 0; |
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int result = 1; |
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for (int index = 0; index < array.length; index++) { |
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result = PRIME * result + array[index]; |
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} |
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return result;
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} |
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public boolean equals(Object obj) { |
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if (this == obj) |
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return true; |
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if (obj == null) |
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return false; |
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if (getClass() != obj.getClass())
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return false; |
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final TransparencyRange other = (TransparencyRange) obj;
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if (alpha != other.alpha)
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return false; |
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if (and != other.and)
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return false; |
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if (!Arrays.equals(blue, other.blue)) |
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return false; |
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if (!Arrays.equals(green, other.green)) |
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return false; |
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if (!Arrays.equals(red, other.red)) |
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return false; |
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if (strEntry == null) { |
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if (other.strEntry != null) |
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return false; |
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} else if (!strEntry.equals(other.strEntry)) |
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return false; |
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return true; |
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} |
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} |