root / trunk / libraries / libCq_CMS_praster / src / org / cresques / io / datastruct / HistogramPersistence.java @ 8026
History | View | Annotate | Download (4.07 KB)
1 |
package org.cresques.io.datastruct; |
---|---|
2 |
|
3 |
import java.io.BufferedReader; |
4 |
import java.io.File; |
5 |
import java.io.FileInputStream; |
6 |
import java.io.FileWriter; |
7 |
import java.io.IOException; |
8 |
import java.io.InputStreamReader; |
9 |
import java.io.Reader; |
10 |
import java.io.Writer; |
11 |
|
12 |
/**
|
13 |
* Clase con herramientas la persistencia de los histogramas calculados.
|
14 |
* Se implementan m?todos para ecribir y leer en los ficheros .rmf correspondientes
|
15 |
* los histogramas calculados.
|
16 |
* @author Miguel ?ngel Querol Carratal? <querol_mig@gva.es>
|
17 |
*
|
18 |
*/
|
19 |
public class HistogramPersistence { |
20 |
|
21 |
|
22 |
public HistogramPersistence(){
|
23 |
} |
24 |
|
25 |
/**
|
26 |
* Crea o modifica el archivo .rmf asociado al GeoRasterFile del que le pasamos
|
27 |
* el nombre con los valores del histograma.
|
28 |
* @param histogram
|
29 |
* @param grfName
|
30 |
* @throws IOException
|
31 |
*/
|
32 |
public void makeRMFHistogram(int histogram[][], String grfName, int numBands)throws IOException{ |
33 |
File rmfFile = null; |
34 |
File rmfAux = null; |
35 |
Writer writer = null; |
36 |
boolean copy = true; |
37 |
|
38 |
rmfFile = new File(grfName.substring(0, grfName.lastIndexOf(".") + 1) + "rmf"); |
39 |
if(rmfFile.exists()){
|
40 |
BufferedReader inGrf = new BufferedReader(new InputStreamReader(new FileInputStream(rmfFile))); |
41 |
String str = inGrf.readLine();
|
42 |
rmfAux = new File(grfName.substring(0, grfName.lastIndexOf(".") + 1) + "aux.rmf"); |
43 |
rmfAux.createNewFile(); |
44 |
writer = new FileWriter(rmfAux); |
45 |
|
46 |
while(str != null){ |
47 |
if(!str.equals("</RasterMetaFile>")){ |
48 |
if(str.equals("<Histogram>")) |
49 |
copy = false;
|
50 |
if(str.equals("</Histogram>")) |
51 |
copy = true;
|
52 |
if(copy && (!str.equals("</Histogram>"))) |
53 |
writer.write(str + "\n");
|
54 |
}else{
|
55 |
writer.write(getRMFHistogramHeader()); |
56 |
for (int i = 0; i < numBands ; i++){ |
57 |
writer.write(getXMLRasterBandHistogram(histogram, i)); |
58 |
} |
59 |
writer.write(getRMFHistogramEnd()); |
60 |
writer.write(str + "\n");
|
61 |
} |
62 |
str = inGrf.readLine(); |
63 |
} |
64 |
writer.close(); |
65 |
|
66 |
rmfAux.renameTo(rmfFile); |
67 |
|
68 |
|
69 |
}else{
|
70 |
rmfFile.createNewFile(); |
71 |
writer = new FileWriter(rmfFile); |
72 |
writer.write(getRMFHeader()); |
73 |
writer.write(getRMFHistogramHeader()); |
74 |
for (int i = 0; i < numBands ; i++){ |
75 |
writer.write(getXMLRasterBandHistogram(histogram, i)); |
76 |
} |
77 |
writer.write(getRMFHistogramEnd()); |
78 |
writer.write(getRMFEnd()); |
79 |
writer.close(); |
80 |
} |
81 |
} |
82 |
|
83 |
|
84 |
|
85 |
/**
|
86 |
* Calcula la cabecera del archivo .rmf asociado a la imagen en el caso
|
87 |
* de que ?ste no exista.
|
88 |
* @return
|
89 |
*/
|
90 |
private String getRMFHeader(){ |
91 |
StringBuffer buffer = new StringBuffer(); |
92 |
|
93 |
buffer.append("<?xml version=\"1.0\" encoding=\"ISO-8859-15\"?>\n");
|
94 |
buffer.append("<RasterMetaFile xmlns=\"http://www.gvsig.org\">\n");
|
95 |
|
96 |
return buffer.toString();
|
97 |
} |
98 |
|
99 |
/**
|
100 |
* Crea el final del archivo .rmf asociado a la imagen en el caso de que
|
101 |
* ?ste no exista.
|
102 |
* @return
|
103 |
*/
|
104 |
private String getRMFEnd(){ |
105 |
StringBuffer buffer = new StringBuffer(); |
106 |
|
107 |
buffer.append("</RasterMetaFile>\n");
|
108 |
|
109 |
return buffer.toString();
|
110 |
} |
111 |
|
112 |
/**
|
113 |
* Crea la cabecera en XML para el bloque del histograma completo de la
|
114 |
* imagen.
|
115 |
* @return
|
116 |
*/
|
117 |
private String getRMFHistogramHeader(){ |
118 |
StringBuffer buffer = new StringBuffer(); |
119 |
|
120 |
buffer.append("<Histogram>\n");
|
121 |
buffer.append("\t<FullHistogram>\n");
|
122 |
|
123 |
return buffer.toString();
|
124 |
} |
125 |
|
126 |
/**
|
127 |
* Crea el final en XML para el bloque del histograma completo de la
|
128 |
* imagen.
|
129 |
* @return
|
130 |
*/
|
131 |
private String getRMFHistogramEnd(){ |
132 |
StringBuffer buffer = new StringBuffer(); |
133 |
|
134 |
buffer.append("\t</FullHistogram>\n");
|
135 |
buffer.append("</Histogram>\n");
|
136 |
|
137 |
return buffer.toString();
|
138 |
} |
139 |
|
140 |
/**
|
141 |
* Crea el c?digo XML correspondiendte a los datos del histograma de la
|
142 |
* imagen de la banda correspondiente.
|
143 |
* @param n_band: banda de la que crear el XML con los datos de su histograma.
|
144 |
* @return
|
145 |
*/
|
146 |
private String getXMLRasterBandHistogram(int histogram[][], int n_band){ |
147 |
StringBuffer buffer = new StringBuffer(); |
148 |
|
149 |
buffer.append("\t\t<Band>\n");
|
150 |
buffer.append("\t\t\t<Values>");
|
151 |
for (int i = 0 ; i <= 255 ; i++) |
152 |
buffer.append(histogram[n_band][i] + " ");
|
153 |
buffer.append("</Values>\n");
|
154 |
buffer.append("\t\t</Band>\n");
|
155 |
|
156 |
return buffer.toString();
|
157 |
} |
158 |
|
159 |
} |