root / trunk / extensions / extRasterTools-SE / src / org / gvsig / rastertools / histogram / HistogramPersistence.java @ 10799
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package org.gvsig.rastertools.histogram; |
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import java.io.BufferedReader; |
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import java.io.File; |
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import java.io.FileInputStream; |
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import java.io.FileWriter; |
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import java.io.IOException; |
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import java.io.InputStreamReader; |
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import java.io.Writer; |
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/**
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* Clase con herramientas la persistencia de los histogramas calculados.
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* Se implementan m?todos para ecribir y leer en los ficheros .rmf correspondientes
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* los histogramas calculados.
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* @author Miguel ?ngel Querol Carratal? <querol_mig@gva.es>
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*
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*/
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public class HistogramPersistence { |
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public HistogramPersistence(){
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} |
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/**
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* Crea o modifica el archivo .rmf asociado al GeoRasterFile del que le pasamos
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* el nombre con los valores del histograma.
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* @param histogram
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* @param grfName
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* @throws IOException
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*/
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public void makeRMFHistogram(int histogram[][], String grfName, int numBands)throws IOException{ |
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File rmfFile = null; |
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File rmfAux = null; |
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Writer writer = null; |
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boolean copy = true; |
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rmfFile = new File(grfName.substring(0, grfName.lastIndexOf(".") + 1) + "rmf"); |
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if(rmfFile.exists()){
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BufferedReader inGrf = new BufferedReader(new InputStreamReader(new FileInputStream(rmfFile))); |
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String str = inGrf.readLine();
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rmfAux = new File(grfName.substring(0, grfName.lastIndexOf(".") + 1) + "aux.rmf"); |
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rmfAux.createNewFile(); |
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writer = new FileWriter(rmfAux); |
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while(str != null){ |
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if(!str.equals("</RasterMetaFile>")){ |
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if(str.equals("<Histogram>")) |
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copy = false;
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if(str.equals("</Histogram>")) |
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copy = true;
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if(copy && (!str.equals("</Histogram>"))) |
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writer.write(str + "\n");
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}else{
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writer.write(getRMFHistogramHeader()); |
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for (int i = 0; i < numBands ; i++){ |
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writer.write(getXMLRasterBandHistogram(histogram, i)); |
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} |
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writer.write(getRMFHistogramEnd()); |
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writer.write(str + "\n");
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} |
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str = inGrf.readLine(); |
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} |
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writer.close(); |
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rmfAux.renameTo(rmfFile); |
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}else{
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rmfFile.createNewFile(); |
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writer = new FileWriter(rmfFile); |
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writer.write(getRMFHeader()); |
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writer.write(getRMFHistogramHeader()); |
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for (int i = 0; i < numBands ; i++){ |
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writer.write(getXMLRasterBandHistogram(histogram, i)); |
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} |
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writer.write(getRMFHistogramEnd()); |
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writer.write(getRMFEnd()); |
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writer.close(); |
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} |
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} |
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/**
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* Calcula la cabecera del archivo .rmf asociado a la imagen en el caso
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* de que ?ste no exista.
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* @return
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*/
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private String getRMFHeader(){ |
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StringBuffer buffer = new StringBuffer(); |
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buffer.append("<?xml version=\"1.0\" encoding=\"ISO-8859-15\"?>\n");
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buffer.append("<RasterMetaFile xmlns=\"http://www.gvsig.org\">\n");
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return buffer.toString();
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} |
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/**
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* Crea el final del archivo .rmf asociado a la imagen en el caso de que
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* ?ste no exista.
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* @return
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*/
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private String getRMFEnd(){ |
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StringBuffer buffer = new StringBuffer(); |
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buffer.append("</RasterMetaFile>\n");
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return buffer.toString();
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} |
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/**
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* Crea la cabecera en XML para el bloque del histograma completo de la
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* imagen.
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* @return
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*/
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private String getRMFHistogramHeader(){ |
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StringBuffer buffer = new StringBuffer(); |
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buffer.append("<Histogram>\n");
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buffer.append("\t<FullHistogram>\n");
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return buffer.toString();
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} |
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/**
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* Crea el final en XML para el bloque del histograma completo de la
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* imagen.
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* @return
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*/
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private String getRMFHistogramEnd(){ |
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StringBuffer buffer = new StringBuffer(); |
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buffer.append("\t</FullHistogram>\n");
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buffer.append("</Histogram>\n");
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return buffer.toString();
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} |
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/**
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* Crea el c?digo XML correspondiendte a los datos del histograma de la
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* imagen de la banda correspondiente.
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* @param n_band: banda de la que crear el XML con los datos de su histograma.
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* @return
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*/
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private String getXMLRasterBandHistogram(int histogram[][], int n_band){ |
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StringBuffer buffer = new StringBuffer(); |
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buffer.append("\t\t<Band>\n");
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buffer.append("\t\t\t<Values>");
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for (int i = 0 ; i <= 255 ; i++) |
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buffer.append(histogram[n_band][i] + " ");
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buffer.append("</Values>\n");
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buffer.append("\t\t</Band>\n");
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return buffer.toString();
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} |
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} |