svn-gvsig-desktop / branches / org.gvsig.desktop-2018a / org.gvsig.desktop.compat.cdc / org.gvsig.fmap.dal / org.gvsig.fmap.dal.file / org.gvsig.fmap.dal.file.bsq / src / main / java / org / gvsig / fmap / dal / file / bsq / BSQBandPageManager.java @ 43873
History | View | Annotate | Download (5.07 KB)
1 |
|
---|---|
2 |
package org.gvsig.fmap.dal.file.bsq; |
3 |
|
4 |
import java.io.File; |
5 |
import java.io.IOException; |
6 |
import java.io.RandomAccessFile; |
7 |
import java.nio.Buffer; |
8 |
import java.nio.ByteBuffer; |
9 |
import java.nio.DoubleBuffer; |
10 |
import java.nio.FloatBuffer; |
11 |
import java.nio.IntBuffer; |
12 |
import java.nio.ShortBuffer; |
13 |
import org.apache.commons.io.IOUtils; |
14 |
import org.gvsig.raster.lib.buffer.api.BandInfo; |
15 |
import org.gvsig.raster.lib.buffer.api.BandPageManager; |
16 |
import org.gvsig.raster.lib.buffer.api.BufferLocator; |
17 |
import org.gvsig.raster.lib.buffer.api.BufferManager; |
18 |
import org.gvsig.tools.dispose.impl.AbstractDisposable; |
19 |
import org.gvsig.tools.exception.BaseException; |
20 |
|
21 |
public class BSQBandPageManager extends AbstractDisposable implements BandPageManager { |
22 |
|
23 |
private RandomAccessFile raf; |
24 |
private final int rows; |
25 |
private final int columns; |
26 |
private final int dataType; |
27 |
private final File file; |
28 |
private final long startpos; |
29 |
|
30 |
/**
|
31 |
* @param file
|
32 |
* @param startpos
|
33 |
* @param rows
|
34 |
* @param columns
|
35 |
* @param dataType
|
36 |
* @throws IOException
|
37 |
*/
|
38 |
public BSQBandPageManager(File file, long startpos, int rows, int columns, int dataType) throws IOException { |
39 |
this.rows = rows;
|
40 |
this.columns = columns;
|
41 |
this.dataType = dataType;
|
42 |
this.file = file;
|
43 |
this.startpos = startpos;
|
44 |
|
45 |
this.raf = new RandomAccessFile(this.file, "r"); |
46 |
// BufferManager bufferManager = BufferLocator.getBufferManager();
|
47 |
//raf.setLength(rows*columns*bufferManager.getDataTypeSize(dataType));
|
48 |
|
49 |
} |
50 |
|
51 |
@Override
|
52 |
public void load(Buffer buffer, int row, int rows, int dataType) throws IOException { |
53 |
|
54 |
long pos = row*this.columns + this.startpos; |
55 |
raf.seek(pos); |
56 |
BufferManager bufferManager = BufferLocator.getBufferManager(); |
57 |
int dataTypeSize = bufferManager.getDataTypeSize(dataType);
|
58 |
byte[] byteArray = new byte[buffer.capacity() * dataTypeSize]; |
59 |
raf.read(byteArray); |
60 |
buffer.rewind(); |
61 |
|
62 |
switch (dataType) {
|
63 |
case BufferManager.TYPE_BYTE:
|
64 |
//FIXME: Elegir cual de las dos siguientes maneras de hacerlo es la id?nea
|
65 |
|
66 |
((ByteBuffer) buffer).put(byteArray, 0, byteArray.length); |
67 |
// System.arraycopy(byteArray, 0, ((ByteBuffer) buffer).array(), 0, byteArray.length);
|
68 |
break;
|
69 |
case BufferManager.TYPE_SHORT:
|
70 |
case BufferManager.TYPE_USHORT:
|
71 |
for( int cell =0 ; cell<byteArray.length ; cell++ ) { |
72 |
((ShortBuffer) buffer).put((int)(cell/dataTypeSize), byteArray[cell]); |
73 |
} |
74 |
break;
|
75 |
case BufferManager.TYPE_INT:
|
76 |
for( int cell =0 ; cell<byteArray.length ; cell++ ) { |
77 |
((IntBuffer) buffer).put((int)(cell/dataTypeSize), byteArray[cell]); |
78 |
} |
79 |
break;
|
80 |
case BufferManager.TYPE_FLOAT:
|
81 |
for( int cell =0 ; cell<byteArray.length ; cell++ ) { |
82 |
((FloatBuffer) buffer).put((int)(cell/dataTypeSize), byteArray[cell]); |
83 |
} |
84 |
break;
|
85 |
|
86 |
case BufferManager.TYPE_DOUBLE:
|
87 |
for( int cell =0 ; cell<byteArray.length ; cell++ ) { |
88 |
((DoubleBuffer) buffer).put((int)(cell/dataTypeSize), byteArray[cell]); |
89 |
} |
90 |
break;
|
91 |
|
92 |
default:
|
93 |
throw new IllegalArgumentException("Data Type " + dataType + " not supported."); |
94 |
} |
95 |
} |
96 |
|
97 |
@Override
|
98 |
public void save(Buffer buffer, int row, int rows, int dataType) throws IOException { |
99 |
|
100 |
long pos = row*this.columns + this.startpos; |
101 |
raf.seek(pos); |
102 |
|
103 |
BufferManager bufferManager = BufferLocator.getBufferManager(); |
104 |
ByteBuffer byteBuffer = ByteBuffer.allocate(buffer.capacity() * bufferManager.getDataTypeSize(dataType)); |
105 |
switch (dataType) {
|
106 |
case BufferManager.TYPE_BYTE:
|
107 |
byteBuffer.put(((ByteBuffer)buffer).array());
|
108 |
break;
|
109 |
case BufferManager.TYPE_SHORT:
|
110 |
case BufferManager.TYPE_USHORT:
|
111 |
ShortBuffer byteAsShortBuffer = byteBuffer.asShortBuffer();
|
112 |
byteAsShortBuffer.put((short[]) buffer.array()); |
113 |
break;
|
114 |
case BufferManager.TYPE_INT:
|
115 |
IntBuffer byteAsIntBuffer = byteBuffer.asIntBuffer();
|
116 |
byteAsIntBuffer.put((int[]) buffer.array()); |
117 |
break;
|
118 |
case BufferManager.TYPE_FLOAT:
|
119 |
FloatBuffer byteAsFloatBuffer = byteBuffer.asFloatBuffer();
|
120 |
byteAsFloatBuffer.put((float[]) buffer.array()); |
121 |
break;
|
122 |
case BufferManager.TYPE_DOUBLE:
|
123 |
DoubleBuffer byteAsDoubleBuffer = byteBuffer.asDoubleBuffer();
|
124 |
byteAsDoubleBuffer.put((double[]) buffer.array()); |
125 |
break;
|
126 |
default:
|
127 |
throw new IllegalArgumentException("Data Type " + dataType + " not supported."); |
128 |
} |
129 |
raf.write(byteBuffer.array()); |
130 |
|
131 |
} |
132 |
|
133 |
@Override
|
134 |
public boolean isSupportedSave() { |
135 |
return false; |
136 |
} |
137 |
|
138 |
@Override
|
139 |
public BandInfo getBandInfo() {
|
140 |
return null; |
141 |
} |
142 |
|
143 |
@Override
|
144 |
protected void doDispose() throws BaseException { |
145 |
IOUtils.closeQuietly(this.raf);
|
146 |
this.raf = null; |
147 |
} |
148 |
} |