root / trunk / libraries / libRaster / src / org / gvsig / raster / datastruct / serializer / HistogramRmfSerializer.java @ 20866
History | View | Annotate | Download (7.42 KB)
| 1 | 12383 | nacho | /* gvSIG. Sistema de Informaci?n Geogr?fica de la Generalitat Valenciana
|
|---|---|---|---|
| 2 | *
|
||
| 3 | * Copyright (C) 2007 IVER T.I. and Generalitat Valenciana.
|
||
| 4 | *
|
||
| 5 | * This program is free software; you can redistribute it and/or
|
||
| 6 | * modify it under the terms of the GNU General Public License
|
||
| 7 | * as published by the Free Software Foundation; either version 2
|
||
| 8 | * of the License, or (at your option) any later version.
|
||
| 9 | *
|
||
| 10 | * This program is distributed in the hope that it will be useful,
|
||
| 11 | * but WITHOUT ANY WARRANTY; without even the implied warranty of
|
||
| 12 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
||
| 13 | * GNU General Public License for more details.
|
||
| 14 | *
|
||
| 15 | * You should have received a copy of the GNU General Public License
|
||
| 16 | * along with this program; if not, write to the Free Software
|
||
| 17 | * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307,USA.
|
||
| 18 | */
|
||
| 19 | package org.gvsig.raster.datastruct.serializer; |
||
| 20 | |||
| 21 | import java.io.IOException; |
||
| 22 | import java.io.Reader; |
||
| 23 | import java.io.StringReader; |
||
| 24 | |||
| 25 | import org.gvsig.raster.dataset.io.rmf.ClassSerializer; |
||
| 26 | import org.gvsig.raster.dataset.io.rmf.ParsingException; |
||
| 27 | import org.gvsig.raster.datastruct.Histogram; |
||
| 28 | import org.gvsig.raster.datastruct.HistogramClass; |
||
| 29 | import org.kxml2.io.KXmlParser; |
||
| 30 | import org.xmlpull.v1.XmlPullParserException; |
||
| 31 | |||
| 32 | /**
|
||
| 33 | * <P>
|
||
| 34 | * Clase para convertir a XML un histograma y obtener el histograma desde XML.
|
||
| 35 | * Esta clase implementa el interfaz IRmfBlock con los m?todos de escritura y
|
||
| 36 | * lectura. Estos ser?n utilizados por el gestor de ficheros RMF para escribir y
|
||
| 37 | * leer datos.
|
||
| 38 | * </P>
|
||
| 39 | * <P>
|
||
| 40 | * La estructura XML de un histograma es la siguiente:
|
||
| 41 | * </P>
|
||
| 42 | * <P>
|
||
| 43 | *\<Histogram\> <BR>
|
||
| 44 | * \<ClassInterval\>1.0\</ClassInterval\><BR>
|
||
| 45 | * \<Min\>0.0\</Min\><BR>
|
||
| 46 | * \<Max\>255.0\</Max\><BR>
|
||
| 47 | * \<BandCount\>3\</BandCount\><BR>
|
||
| 48 | * \<Band\><BR>
|
||
| 49 | * \<Values\>13 2 0 ... 2 1 6\</Values\><BR>
|
||
| 50 | * \</Band\><BR>
|
||
| 51 | * \<Band\><BR>
|
||
| 52 | * \<Values\>6 2 2 ... 3 2 8\</Values\><BR>
|
||
| 53 | * \</Band\><BR>
|
||
| 54 | * \<Band\><BR>
|
||
| 55 | * \<Values\>16 1 1 ... 1 1 9\</Values\><BR>
|
||
| 56 | * \</Band\><BR\>
|
||
| 57 | *\</Histogram\><BR>
|
||
| 58 | *\</P\>
|
||
| 59 | * @version 23/04/2007
|
||
| 60 | * @author Nacho Brodin (nachobrodin@gmail.com)
|
||
| 61 | *
|
||
| 62 | */
|
||
| 63 | public class HistogramRmfSerializer extends ClassSerializer { |
||
| 64 | |||
| 65 | //TAGS
|
||
| 66 | public static final String MAIN_TAG = "Histogram"; |
||
| 67 | public static final String CLASSINTERVAL = "ClassInterval"; |
||
| 68 | public static final String MIN = "Min"; |
||
| 69 | public static final String MAX = "Max"; |
||
| 70 | public static final String BAND = "Band"; |
||
| 71 | public static final String VALUES = "Values"; |
||
| 72 | public static final String BAND_COUNT = "BandCount"; |
||
| 73 | |||
| 74 | private Histogram histogram = null; |
||
| 75 | |||
| 76 | /**
|
||
| 77 | * Constructor. Asigna el histograma a serializar.
|
||
| 78 | * @param Histogram histograma a convertir en XML
|
||
| 79 | */
|
||
| 80 | public HistogramRmfSerializer(Histogram hist) {
|
||
| 81 | this.histogram = hist;
|
||
| 82 | } |
||
| 83 | |||
| 84 | /**
|
||
| 85 | * Constructor.
|
||
| 86 | */
|
||
| 87 | public HistogramRmfSerializer() {
|
||
| 88 | } |
||
| 89 | |||
| 90 | /**
|
||
| 91 | * Convierte una lista de valores en un solo String en un array de long
|
||
| 92 | * @param list Cadena con la lista de valores
|
||
| 93 | * @return Array de valores long
|
||
| 94 | * @throws XmlPullParserException
|
||
| 95 | * @throws IOException
|
||
| 96 | */
|
||
| 97 | private long[] parseLongList(String list) throws XmlPullParserException, IOException { |
||
| 98 | String[] sValues = list.split(" "); |
||
| 99 | long[] dValues = new long[sValues.length]; |
||
| 100 | for (int i = 0; i < sValues.length; i++) |
||
| 101 | dValues[i] = Long.parseLong(sValues[i]);
|
||
| 102 | return dValues;
|
||
| 103 | } |
||
| 104 | |||
| 105 | /**
|
||
| 106 | * Parsea el tag Band para extraer la lista de valores (Values) asociada a una banda.
|
||
| 107 | * @param parser KXmlParser
|
||
| 108 | * @return Array de long
|
||
| 109 | * @throws XmlPullParserException
|
||
| 110 | * @throws IOException
|
||
| 111 | */
|
||
| 112 | private long[] parserHistogramListValues(KXmlParser parser) throws XmlPullParserException, IOException { |
||
| 113 | long[] valueList = null; |
||
| 114 | boolean end = false; |
||
| 115 | boolean tagOk = false; |
||
| 116 | int tag = parser.next();
|
||
| 117 | while (!end) {
|
||
| 118 | switch(tag) {
|
||
| 119 | case KXmlParser.START_TAG:
|
||
| 120 | if(parser.getName() != null) { |
||
| 121 | if (parser.getName().compareTo(VALUES) == 0) |
||
| 122 | tagOk = true;
|
||
| 123 | } |
||
| 124 | break;
|
||
| 125 | case KXmlParser.END_TAG:
|
||
| 126 | if (parser.getName().compareTo(BAND) == 0) |
||
| 127 | end = true;
|
||
| 128 | break;
|
||
| 129 | case KXmlParser.TEXT:
|
||
| 130 | if(tagOk) {
|
||
| 131 | valueList = parseLongList(parser.getText()); |
||
| 132 | tagOk = false;
|
||
| 133 | } |
||
| 134 | break;
|
||
| 135 | } |
||
| 136 | if (!end)
|
||
| 137 | tag = parser.next(); |
||
| 138 | } |
||
| 139 | return valueList;
|
||
| 140 | } |
||
| 141 | |||
| 142 | /*
|
||
| 143 | * (non-Javadoc)
|
||
| 144 | * @see org.gvsig.raster.dataset.io.rmf.IRmfBlock#read(java.lang.String)
|
||
| 145 | */
|
||
| 146 | public void read(String xml) throws ParsingException { |
||
| 147 | 13353 | nacho | //double interval = 0D;
|
| 148 | 12383 | nacho | double min = 0D; |
| 149 | double max = 0D; |
||
| 150 | int numBands = 0; |
||
| 151 | long[][] values = null; |
||
| 152 | |||
| 153 | KXmlParser parser = new KXmlParser();
|
||
| 154 | Reader reader = new StringReader(xml); |
||
| 155 | try {
|
||
| 156 | parser.setInput(reader); |
||
| 157 | } catch (XmlPullParserException e) {
|
||
| 158 | throw new ParsingException(xml); |
||
| 159 | } |
||
| 160 | try {
|
||
| 161 | int tag = parser.nextTag();
|
||
| 162 | |||
| 163 | if ( parser.getEventType() != KXmlParser.END_DOCUMENT ){
|
||
| 164 | parser.require(KXmlParser.START_TAG, null, MAIN_TAG);
|
||
| 165 | while(tag != KXmlParser.END_DOCUMENT) {
|
||
| 166 | switch(tag) {
|
||
| 167 | case KXmlParser.START_TAG:
|
||
| 168 | if(parser.getName() != null) { |
||
| 169 | if (parser.getName().compareTo(MAIN_TAG) == 0) { |
||
| 170 | String interStr = parserString(parser, CLASSINTERVAL, new String[]{"FullHistogram"}); |
||
| 171 | if(interStr == null) |
||
| 172 | return;
|
||
| 173 | 13353 | nacho | //interval = Double.parseDouble(interStr);
|
| 174 | 12383 | nacho | min = Double.parseDouble(parserString(parser, MIN, null)); |
| 175 | max = Double.parseDouble(parserString(parser, MAX, null)); |
||
| 176 | numBands = (int)Double.parseDouble(parserString(parser, BAND_COUNT, null)); |
||
| 177 | values = new long[numBands][]; |
||
| 178 | for (int iBand = 0; iBand < numBands; iBand++) |
||
| 179 | values[iBand] = parserHistogramListValues(parser); |
||
| 180 | } |
||
| 181 | } |
||
| 182 | break;
|
||
| 183 | case KXmlParser.END_TAG:
|
||
| 184 | break;
|
||
| 185 | case KXmlParser.TEXT:
|
||
| 186 | break;
|
||
| 187 | } |
||
| 188 | tag = parser.next(); |
||
| 189 | } |
||
| 190 | parser.require(KXmlParser.END_DOCUMENT, null, null); |
||
| 191 | } |
||
| 192 | |||
| 193 | } catch (XmlPullParserException e) {
|
||
| 194 | throw new ParsingException(xml); |
||
| 195 | } catch (IOException e) { |
||
| 196 | throw new ParsingException(xml); |
||
| 197 | } |
||
| 198 | |||
| 199 | histogram = new Histogram(numBands, values[0].length, min, max); |
||
| 200 | histogram.setTable(values); |
||
| 201 | } |
||
| 202 | |||
| 203 | /*
|
||
| 204 | * (non-Javadoc)
|
||
| 205 | * @see org.gvsig.raster.dataset.io.rmf.IRmfBlock#write()
|
||
| 206 | */
|
||
| 207 | public String write() { |
||
| 208 | StringBuffer b = new StringBuffer(); |
||
| 209 | HistogramClass[][] c = histogram.getHistogram(); |
||
| 210 | |||
| 211 | b.append("<" + MAIN_TAG + ">\n"); |
||
| 212 | |||
| 213 | double interval = c[0][0].getMax() - c[0][0].getMin(); |
||
| 214 | putProperty(b, CLASSINTERVAL, interval, 1);
|
||
| 215 | putProperty(b, MIN, c[0][0].getMin(), 1); |
||
| 216 | putProperty(b, MAX, c[0][c[0].length - 1].getMax(), 1); |
||
| 217 | putProperty(b, BAND_COUNT, histogram.getNumBands(), 1);
|
||
| 218 | |||
| 219 | for (int iBand = 0; iBand < histogram.getNumBands(); iBand++) { |
||
| 220 | b.append("\t<" + BAND + ">\n"); |
||
| 221 | b.append("\t\t<" + VALUES + ">"); |
||
| 222 | for (int iValues = 0; iValues < histogram.getNumValues(); iValues++) |
||
| 223 | b.append((long)histogram.getHistogramValueByPos(iBand, iValues) + " "); |
||
| 224 | b.append("</" + VALUES + ">\n"); |
||
| 225 | b.append("\t</" + BAND + ">\n"); |
||
| 226 | } |
||
| 227 | 12511 | nacho | b.append("</" + MAIN_TAG + ">\n"); |
| 228 | 12383 | nacho | return b.toString();
|
| 229 | } |
||
| 230 | |||
| 231 | /*
|
||
| 232 | * (non-Javadoc)
|
||
| 233 | * @see org.gvsig.raster.dataset.io.rmf.IRmfBlock#getResult()
|
||
| 234 | */
|
||
| 235 | public Object getResult() { |
||
| 236 | return (Histogram)histogram;
|
||
| 237 | } |
||
| 238 | |||
| 239 | /*
|
||
| 240 | * (non-Javadoc)
|
||
| 241 | * @see org.gvsig.raster.dataset.io.rmf.IRmfBlock#getMainTag()
|
||
| 242 | */
|
||
| 243 | public String getMainTag() { |
||
| 244 | return MAIN_TAG;
|
||
| 245 | } |
||
| 246 | } |