svn-gvsig-desktop / trunk / org.gvsig.desktop / 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 @ 44831
History | View | Annotate | Download (3.74 KB)
1 | 44831 | jjdelcerro | |
---|---|---|---|
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.ByteOrder; |
||
10 | import java.nio.DoubleBuffer; |
||
11 | import java.nio.FloatBuffer; |
||
12 | import java.nio.IntBuffer; |
||
13 | import java.nio.ShortBuffer; |
||
14 | import org.apache.commons.io.IOUtils; |
||
15 | import org.gvsig.raster.lib.buffer.api.BandInfo; |
||
16 | import org.gvsig.raster.lib.buffer.api.BandPageManager; |
||
17 | import org.gvsig.raster.lib.buffer.api.BufferLocator; |
||
18 | import org.gvsig.raster.lib.buffer.api.BufferManager; |
||
19 | import org.gvsig.tools.dispose.impl.AbstractDisposable; |
||
20 | import org.gvsig.tools.exception.BaseException; |
||
21 | |||
22 | public class BSQBandPageManager extends AbstractDisposable implements BandPageManager { |
||
23 | |||
24 | private RandomAccessFile raf; |
||
25 | private final int rows; |
||
26 | private final int columns; |
||
27 | private final int dataType; |
||
28 | private final File file; |
||
29 | private final long startpos; |
||
30 | private final ByteOrder byteOrder; |
||
31 | |||
32 | /**
|
||
33 | * @param file
|
||
34 | * @param startpos
|
||
35 | * @param rows
|
||
36 | * @param columns
|
||
37 | * @param dataType
|
||
38 | * @param byteOrder
|
||
39 | * @throws IOException
|
||
40 | */
|
||
41 | public BSQBandPageManager(File file, long startpos, int rows, int columns, int dataType, ByteOrder byteOrder) throws IOException { |
||
42 | this.rows = rows;
|
||
43 | this.columns = columns;
|
||
44 | this.dataType = dataType;
|
||
45 | this.file = file;
|
||
46 | this.startpos = startpos;
|
||
47 | this.byteOrder = byteOrder;
|
||
48 | |||
49 | this.raf = new RandomAccessFile(this.file, "r"); |
||
50 | // BufferManager bufferManager = BufferLocator.getBufferManager();
|
||
51 | //raf.setLength(rows*columns*bufferManager.getDataTypeSize(dataType));
|
||
52 | |||
53 | } |
||
54 | |||
55 | @Override
|
||
56 | public void load(Buffer buffer, int row, int rows, int dataType) throws IOException { |
||
57 | |||
58 | long pos = row*this.columns + this.startpos; |
||
59 | raf.seek(pos); |
||
60 | BufferManager bufferManager = BufferLocator.getBufferManager(); |
||
61 | int dataTypeSize = bufferManager.getDataTypeSize(dataType);
|
||
62 | int elements = buffer.capacity();
|
||
63 | |||
64 | ByteBuffer byteBuffer = ByteBuffer.allocate(elements * dataTypeSize); |
||
65 | byteBuffer.order(this.byteOrder);
|
||
66 | raf.read(byteBuffer.array()); |
||
67 | |||
68 | buffer.rewind(); |
||
69 | byteBuffer.rewind(); |
||
70 | |||
71 | switch (dataType) {
|
||
72 | case BufferManager.TYPE_BYTE:
|
||
73 | ((ByteBuffer) buffer).put(byteBuffer);
|
||
74 | break;
|
||
75 | case BufferManager.TYPE_SHORT:
|
||
76 | case BufferManager.TYPE_USHORT:
|
||
77 | for( int element =0 ; element<elements ; element++ ) { |
||
78 | ((ShortBuffer) buffer).put(byteBuffer.getShort());
|
||
79 | } |
||
80 | break;
|
||
81 | case BufferManager.TYPE_INT:
|
||
82 | for( int element =0 ; element<elements ; element++ ) { |
||
83 | ((IntBuffer) buffer).put(byteBuffer.getInt());
|
||
84 | } |
||
85 | break;
|
||
86 | case BufferManager.TYPE_FLOAT:
|
||
87 | for( int element=0 ; element<elements ; element++ ) { |
||
88 | ((FloatBuffer) buffer).put(byteBuffer.getFloat());
|
||
89 | } |
||
90 | break;
|
||
91 | |||
92 | case BufferManager.TYPE_DOUBLE:
|
||
93 | for( int element=0 ; element<elements ; element++ ) { |
||
94 | ((DoubleBuffer) buffer).put(byteBuffer.getDouble());
|
||
95 | } |
||
96 | break;
|
||
97 | |||
98 | default:
|
||
99 | throw new IllegalArgumentException("Data Type " + dataType + " not supported."); |
||
100 | } |
||
101 | } |
||
102 | |||
103 | @Override
|
||
104 | public void save(Buffer buffer, int row, int rows, int dataType) throws IOException { |
||
105 | |||
106 | } |
||
107 | |||
108 | @Override
|
||
109 | public boolean isSupportedSave() { |
||
110 | return false; |
||
111 | } |
||
112 | |||
113 | @Override
|
||
114 | public BandInfo getBandInfo() {
|
||
115 | return null; |
||
116 | } |
||
117 | |||
118 | @Override
|
||
119 | protected void doDispose() throws BaseException { |
||
120 | IOUtils.closeQuietly(this.raf);
|
||
121 | this.raf = null; |
||
122 | } |
||
123 | } |