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 mid-stream 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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