parallel/util/PartitionUtil.java

package appl.parallel.util;

import java.awt.Rectangle;
import java.awt.image.DataBuffer;

import schmitzm.data.WritableGrid;
import schmitzm.data.WritableGridArray;
import appl.parallel.data.WritableGridArrayPartition;
import appl.parallel.data.WritableGridArrayPartition.Double;
import appl.parallel.data.WritableGridArrayPartition.Float;
import appl.parallel.data.WritableGridArrayPartition.Integer;
import appl.parallel.spmd.split.SplittableResource;
import appl.parallel.spmd.split.WritableGridPartition;
import appl.util.RasterMetaData;

/**
 * See method description for details.
 * 
 * @author Dominik Appl
 */
public class PartitionUtil {

        /**
                 * Returns partition of a {@link WritableGrid} as a {@link WritableGridArray}.
                 * Notice, that the minX and minY values are ignored and will be set to 0
                 * (see {@link WritableGrid} for more information about minX and minY). If
                 * the given {@link WritableGrid} is not an instance of
                 * {@link WritableGridPartition} it is assumed that the topLeft corner of
                 * the source grid is (0,0) (like in standard image processing).<br>
                 * If the partition is a {@link WritableGridPartition} it is assumed that
                 * the the bounds of the two Partition refer to the same coordinate system.
                 * Real coordinates are supposed to reference the South(!)-West Corner.
                 * 
                 * @param sourceGrid
                 *            the grid to be partitioned
                 * @param partitionBounds
                 *            the rectangle describing the partition
                 * @param rootID
                 *            the id to identify the root partition
                 * @return the new partition including the given corners
                 * @see SplittableResource#getRootID()
                 */
                public static WritableGridPartition getPartitialGrid2D(WritableGrid sourceGrid,
                                Rectangle partitionBounds, int rootID) {
                        
        //                              (int) partitionBounds.getX(),
        //                              (int) partitionBounds.getY(),
        //                              (int) (partitionBounds.getX() + partitionBounds.getWidth() - 1),
        //                              (int) (partitionBounds.getY() + partitionBounds.getHeight() - 1));
                        
        //              get Metadata of the big Grid
                        RasterMetaData bigMeta = new RasterMetaData(sourceGrid);
        
                        //create MetaData for the new partitial Grid
                        //Height an width of the partitial Grid
                        int pHeight = (int) partitionBounds.getHeight();
                        int pWidth = (int)partitionBounds.getWidth();
        
                        //real coordinates of the partitial Grid (which are referenced by the SW Corner)
                        double pX = partitionBounds.getX() * bigMeta.getCellWidth() + bigMeta.getX();
                        double pY = (partitionBounds.getY() + partitionBounds.getHeight() - 1) * bigMeta.getCellHeight() + bigMeta.getY();
                        double pRealWidth = pWidth * bigMeta.getCellWidth();
                        double pRealHeight = pHeight * bigMeta.getCellHeight();
        
                        //the MetaData of the new Grid
                        RasterMetaData pMetaData = new RasterMetaData(bigMeta.getDataType(),
                                        pWidth, pHeight, 0, 0, pX, pY, pRealWidth, pRealHeight, bigMeta.getCoordinateReferenceSystem());
        
                        //create empty return Grid
                        WritableGridPartition pGrid;
                        switch(bigMeta.getDataType()){
                        case DataBuffer.TYPE_INT:
                                pGrid = new WritableGridArrayPartition.Integer(pMetaData,rootID,partitionBounds);       
                                break;
                        case DataBuffer.TYPE_DOUBLE:
                                pGrid = new WritableGridArrayPartition.Double(pMetaData,rootID,partitionBounds);
                                break;
                        default:
                                pGrid = new WritableGridArrayPartition.Float(pMetaData,rootID,partitionBounds); 
                        }
                        
                        //if the sourceGrid is a partition itself then we do not want to to start reading from (0,0)
                        //but shifted relative to the global coordinate system. So we calculate now the start values:
                        
                        //for standard WritableGrids these are simply the bounds of the new partition...
                        int startX = (int) partitionBounds.getX();
                        int startY = (int) partitionBounds.getY();
                        
                        // ...but for partitions these values are shifted:
                        if(sourceGrid instanceof WritableGridPartition){
                                Rectangle srcBounds = ((WritableGridPartition) sourceGrid).getPartitionBounds();
                                startX -= srcBounds.getX();
                                startY -= srcBounds.getY();
                        }
                        //read the data into the raster from left to right and downwards
                        int x=0,y=0;
                        try{
                        for (y = 0; y < pHeight; y++)
                                for (x = 0; x < pWidth; x++)
                                        pGrid.setRasterSample(
                                                        sourceGrid.getRasterSample(startX  + x, startY + y),
                                                        x, 
                                                        y);
                        }catch (Exception e) {
                                System.out.println("stop");
                        }
                        return pGrid;
                }

        /**
             * Overwrites the data at the location specified by the {@link Rectangle} with
             * the given partition-data. If the given baseGrid is NOT an instance
                 * of {@link WritableGridPartition} it is assumed that its the topLeft corner (0,0). 
                 * If it IS a {@link WritableGridPartition} it is assumed that the the
                 * bounds of the two Partition refer to the same coordinate system and the partition
                 * is inserted at the correct absolut position.
             * 
                 * @param baseGrid the grid in which the data is inserted
                 * @param gridPartition the grid to be inserted
                 * @param partitionBounds the excact location in coordinates of the baseGrid
                 */
                public static void setPartition(WritableGrid baseGrid, WritableGrid gridPartition, Rectangle partitionBounds) {
                        //Check if partition and the rectangle fit
                        if((gridPartition.getWidth()!=partitionBounds.getWidth()) ||
                                        (gridPartition.getHeight()!=partitionBounds.getHeight()))
                          throw new UnsupportedOperationException("The partition width/height does not match the rectangle width/height");
                        
                        //if the baseeGrid is a partition itself then we do not want to to start writing from (0,0)
                        //but shifted relative to the global coordinate system. So we calculate now the start values:
                        
                        //for standard WritableGrids these are simply the bounds of the new partition...
                        int startX = (int) partitionBounds.getX();
                        int startY = (int) partitionBounds.getY();
                        
                        // ...but for partitions these values are shifted:
                        if(baseGrid instanceof WritableGridPartition){
                                Rectangle targetBounds = ((WritableGridPartition) baseGrid).getPartitionBounds();
                                startX -= targetBounds.getX();
                                startY -= targetBounds.getY();
                        }
                        //check if the partition fits in
        //              if(((partitionBounds.getX()+partitionBounds.getWidth()-1)>baseGrid.getWidth()  ||
        //                              (partitionBounds.getY()+partitionBounds.getHeight()-1)>baseGrid.getHeight()))
        //                              System.out.println("X");
                                //throw new UnsupportedOperationException("The partition does not fit in the Grid!");
                        //write the partition into the Grid
                        
                        for(int y = 0; y < partitionBounds.getHeight();y++)
                                for(int x = 0; x < partitionBounds.getWidth(); x++)
                                        baseGrid.setRasterSample(
                                                                                        gridPartition.getRasterSample(x,y),
                                                                                        x + startX, 
                                                                                        y + startY);
                        
                }

}
1	package appl.parallel.util;
2
3	import java.awt.Rectangle;
4	import java.awt.image.DataBuffer;
5
6	import schmitzm.data.WritableGrid;
7	import schmitzm.data.WritableGridArray;
8	import appl.parallel.data.WritableGridArrayPartition;
9	import appl.parallel.data.WritableGridArrayPartition.Double;
10	import appl.parallel.data.WritableGridArrayPartition.Float;
11	import appl.parallel.data.WritableGridArrayPartition.Integer;
12	import appl.parallel.spmd.split.SplittableResource;
13	import appl.parallel.spmd.split.WritableGridPartition;
14	import appl.util.RasterMetaData;
15
16	/**
17	* See method description for details.
18	*
19	* @author Dominik Appl
20	*/
21	public class PartitionUtil {
22
23	/**
24	* Returns partition of a {@link WritableGrid} as a {@link WritableGridArray}.
25	* Notice, that the minX and minY values are ignored and will be set to 0
26	* (see {@link WritableGrid} for more information about minX and minY). If
27	* the given {@link WritableGrid} is not an instance of
28	* {@link WritableGridPartition} it is assumed that the topLeft corner of
29	* the source grid is (0,0) (like in standard image processing).<br>
30	* If the partition is a {@link WritableGridPartition} it is assumed that
31	* the the bounds of the two Partition refer to the same coordinate system.
32	* Real coordinates are supposed to reference the South(!)-West Corner.
33	*
34	* @param sourceGrid
35	* the grid to be partitioned
36	* @param partitionBounds
37	* the rectangle describing the partition
38	* @param rootID
39	* the id to identify the root partition
40	* @return the new partition including the given corners
41	* @see SplittableResource#getRootID()
42	*/
43	public static WritableGridPartition getPartitialGrid2D(WritableGrid sourceGrid,
44	Rectangle partitionBounds, int rootID) {
45
46	// (int) partitionBounds.getX(),
47	// (int) partitionBounds.getY(),
48	// (int) (partitionBounds.getX() + partitionBounds.getWidth() - 1),
49	// (int) (partitionBounds.getY() + partitionBounds.getHeight() - 1));
50
51	// get Metadata of the big Grid
52	RasterMetaData bigMeta = new RasterMetaData(sourceGrid);
53
54	//create MetaData for the new partitial Grid
55	//Height an width of the partitial Grid
56	int pHeight = (int) partitionBounds.getHeight();
57	int pWidth = (int)partitionBounds.getWidth();
58
59	//real coordinates of the partitial Grid (which are referenced by the SW Corner)
60	double pX = partitionBounds.getX() * bigMeta.getCellWidth() + bigMeta.getX();
61	double pY = (partitionBounds.getY() + partitionBounds.getHeight() - 1) * bigMeta.getCellHeight() + bigMeta.getY();
62	double pRealWidth = pWidth * bigMeta.getCellWidth();
63	double pRealHeight = pHeight * bigMeta.getCellHeight();
64
65	//the MetaData of the new Grid
66	RasterMetaData pMetaData = new RasterMetaData(bigMeta.getDataType(),
67	pWidth, pHeight, 0, 0, pX, pY, pRealWidth, pRealHeight, bigMeta.getCoordinateReferenceSystem());
68
69	//create empty return Grid
70	WritableGridPartition pGrid;
71	switch(bigMeta.getDataType()){
72	case DataBuffer.TYPE_INT:
73	pGrid = new WritableGridArrayPartition.Integer(pMetaData,rootID,partitionBounds);
74	break;
75	case DataBuffer.TYPE_DOUBLE:
76	pGrid = new WritableGridArrayPartition.Double(pMetaData,rootID,partitionBounds);
77	break;
78	default:
79	pGrid = new WritableGridArrayPartition.Float(pMetaData,rootID,partitionBounds);
80	}
81
82	//if the sourceGrid is a partition itself then we do not want to to start reading from (0,0)
83	//but shifted relative to the global coordinate system. So we calculate now the start values:
84
85	//for standard WritableGrids these are simply the bounds of the new partition...
86	int startX = (int) partitionBounds.getX();
87	int startY = (int) partitionBounds.getY();
88
89	// ...but for partitions these values are shifted:
90	if(sourceGrid instanceof WritableGridPartition){
91	Rectangle srcBounds = ((WritableGridPartition) sourceGrid).getPartitionBounds();
92	startX -= srcBounds.getX();
93	startY -= srcBounds.getY();
94	}
95	//read the data into the raster from left to right and downwards
96	int x=0,y=0;
97	try{
98	for (y = 0; y < pHeight; y++)
99	for (x = 0; x < pWidth; x++)
100	pGrid.setRasterSample(
101	sourceGrid.getRasterSample(startX + x, startY + y),
102	x,
103	y);
104	}catch (Exception e) {
105	System.out.println("stop");
106	}
107	return pGrid;
108	}
109
110	/**
111	* Overwrites the data at the location specified by the {@link Rectangle} with
112	* the given partition-data. If the given baseGrid is NOT an instance
113	* of {@link WritableGridPartition} it is assumed that its the topLeft corner (0,0).
114	* If it IS a {@link WritableGridPartition} it is assumed that the the
115	* bounds of the two Partition refer to the same coordinate system and the partition
116	* is inserted at the correct absolut position.
117	*
118	* @param baseGrid the grid in which the data is inserted
119	* @param gridPartition the grid to be inserted
120	* @param partitionBounds the excact location in coordinates of the baseGrid
121	*/
122	public static void setPartition(WritableGrid baseGrid, WritableGrid gridPartition, Rectangle partitionBounds) {
123	//Check if partition and the rectangle fit
124	if((gridPartition.getWidth()!=partitionBounds.getWidth()) \|\|
125	(gridPartition.getHeight()!=partitionBounds.getHeight()))
126	throw new UnsupportedOperationException("The partition width/height does not match the rectangle width/height");
127
128	//if the baseeGrid is a partition itself then we do not want to to start writing from (0,0)
129	//but shifted relative to the global coordinate system. So we calculate now the start values:
130
131	//for standard WritableGrids these are simply the bounds of the new partition...
132	int startX = (int) partitionBounds.getX();
133	int startY = (int) partitionBounds.getY();
134
135	// ...but for partitions these values are shifted:
136	if(baseGrid instanceof WritableGridPartition){
137	Rectangle targetBounds = ((WritableGridPartition) baseGrid).getPartitionBounds();
138	startX -= targetBounds.getX();
139	startY -= targetBounds.getY();
140	}
141	//check if the partition fits in
142	// if(((partitionBounds.getX()+partitionBounds.getWidth()-1)>baseGrid.getWidth() \|\|
143	// (partitionBounds.getY()+partitionBounds.getHeight()-1)>baseGrid.getHeight()))
144	// System.out.println("X");
145	//throw new UnsupportedOperationException("The partition does not fit in the Grid!");
146	//write the partition into the Grid
147
148	for(int y = 0; y < partitionBounds.getHeight();y++)
149	for(int x = 0; x < partitionBounds.getWidth(); x++)
150	baseGrid.setRasterSample(
151	gridPartition.getRasterSample(x,y),
152	x + startX,
153	y + startY);
154
155	}
156
157	}