edu.umn.cs.spatialHadoop.operations

Class Union

java.lang.Object

edu.umn.cs.spatialHadoop.operations.Union

public class Union
extends java.lang.Object

Computes the union of all shapes in a given input file.

Author:

Ahmed Eldawy

Constructor Summary

Constructors

Constructor and Description
Union()

Method Summary

Methods

Modifier and Type	Method and Description
static byte[]	hexToBytes(java.lang.String hex) Convert a string containing a hex string to a byte array of binary.
static void	main(java.lang.String[] args)
static void	union(Path inFile, Path outFile, OperationsParams params)
static void	unionMapReduce(Path inFile, Path output, OperationsParams params) Calculates the union of a set of shapes.
static <S extends OGCJTSShape> Geometry	unionStream(S shape)

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

Union

public Union()

Method Detail

unionMapReduce

public static void unionMapReduce(Path inFile,
                  Path output,
                  OperationsParams params)
                           throws java.io.IOException

Calculates the union of a set of shapes.

Parameters:

inFile - - Input file that contains shapes

output - - An output file that contains each category and the union of all shapes in it. Each line contains the category, then a comma, then the union represented as text.

Throws:

java.io.IOException

hexToBytes

public static byte[] hexToBytes(java.lang.String hex)

Convert a string containing a hex string to a byte array of binary. For example, the string "AABB" is converted to the byte array {0xAA, 0XBB}

Parameters:

hex -

Returns:

unionStream

public static <S extends OGCJTSShape> Geometry unionStream(S shape)
                            throws java.io.IOException

Throws:

java.io.IOException

union

public static void union(Path inFile,
         Path outFile,
         OperationsParams params)
                  throws java.io.IOException

Throws:

java.io.IOException

main

public static void main(java.lang.String[] args)
                 throws java.io.IOException

Parameters:

args -

Throws:

java.io.IOException