How to Copy Files from One Location
to Another Using a Java
Transformation
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Abstract
You can copy files from a flat file source to a flat file target using a Java transformation in
PowerCenter.
Supported Versions
 PowerCenter 8.5.x and later
Table of Contents
Abstract ............................................................................................................................................ 2
Supported Versions ......................................................................................................................... 2
Table of Contents ............................................................................................................................ 2
Overview .......................................................................................................................................... 2
Sample Mapping .............................................................................................................................. 2
Java Transformation ........................................................................................................................ 2
Java Code ........................................................................................................................................ 3
Overview
You can use a Java transformation to copy files from a source location to a target location in
PowerCenter. You use a Java transformation to evaluate conditions and copy files during midstream mapping processing.
Sample Mapping
The following figure shows a sample mapping that copies a flat file from a source location to a
target location using a Java transformation:
Java Transformation
To copy a file from a source location to target location, perform the following tasks:
1. Include the Java .jar file in the following path: [PowerCenter Installation
Directory]/server/bin/javalib
2. Insert the Java code in the On Input Row tab of the Java transformation.
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The following figure shows the sample Java code in the On Input Row tab:
Java Code
Enter the following Java code in the On Input Row tab:
try{
File fromFile = new File(File_filePath);
File toFile = new File(DXFilePath);
if (!fromFile.exists())
throw new IOException("FileCopy: " + "no such source file: "
+ File_filePath);
if (!fromFile.isFile())
throw new IOException("FileCopy: " + "can't copy directory: "
+ File_filePath);
if (!fromFile.canRead())
throw new IOException("FileCopy: " + "source file is unreadable: "
+ File_filePath);
if (toFile.isDirectory())
toFile = new File(toFile, fromFile.getName());
if (toFile.exists()) {
if (!toFile.canWrite())
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throw new IOException("FileCopy: "
+ "destination file is unwriteable: " + File_filePath);
String response = "Y";
if (!response.equals("Y") && !response.equals("y"))
throw new IOException("FileCopy: "
+ "existing file was not overwritten.");
} else {
String parent = toFile.getParent();
if (parent == null)
parent = System.getProperty("user.dir");
File dir = new File(parent);
if (!dir.exists())
throw new IOException("FileCopy: "
+ "destination directory doesn't exist: " + parent);
if (dir.isFile())
throw new IOException("FileCopy: "
+ "destination is not a directory: " + parent);
if (!dir.canWrite())
throw new IOException("FileCopy: "
+ "destination directory is unwriteable: " + parent);
}
FileInputStream from = null;
FileOutputStream to = null;
try {
from = new FileInputStream(fromFile);
to = new FileOutputStream(toFile);
byte[] buffer = new byte[4096];
int bytesRead;
while ((bytesRead = from.read(buffer)) != -1)
to.write(buffer, 0, bytesRead); // write
} finally {
if (from != null)
try {
from.close();
} catch (IOException e) {
;
}
if (to != null)
try {
to.close();
} catch (IOException e) {
;
}
}
}
catch(Exception ex){
ErrorMessage = "unable to move file from "+ File_filePath +" to location:
"+ DXFilePath +". "+ ex.getMessage();
}
Authors
Tanmoy De
Senior Consultant, Informatica Professional Services
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Acknowledgements
The Informatica Documentation team would like to acknowledge Tanmoy De, Senior Consultant,
Informatica Professional Services for the technical content of this article.
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