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Checkin of the XML to CSV Converter POC
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Michael Wall
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Michael Wall
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Mar 26, 2024
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.gradle/ | ||
build/ | ||
target/ |
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Bundle-Name: XML-to-CSV-converter | ||
Bundle-SymbolicName: XML-to-CSV-converter | ||
Bundle-Version: 1.0.0 |
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dependencies { | ||
} |
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108
modules/XML-to-CSV-converter/src/main/java/com/mw/uad/XMLToCSV.java
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package com.mw.uad; | ||
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import java.io.File; | ||
import java.io.FileOutputStream; | ||
import java.io.OutputStreamWriter; | ||
import java.nio.charset.StandardCharsets; | ||
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import javax.xml.transform.Transformer; | ||
import javax.xml.transform.TransformerFactory; | ||
import javax.xml.transform.stream.StreamResult; | ||
import javax.xml.transform.stream.StreamSource; | ||
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public class XMLToCSV { | ||
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public interface XSLT_TEMPLATES { | ||
public static final String HEADER = "/header.xsl"; | ||
public static final String CONTENT = "/content.xsl"; | ||
} | ||
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public static void main(String[] args) { | ||
try { | ||
if (args == null || args.length != 2) { | ||
System.out.println("Arguments not as expected. Unable to proceed."); | ||
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return; | ||
} | ||
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String inputFolderString = args[0]; | ||
String outputFolderString = args[1]; | ||
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System.out.println("inputFolder: " + inputFolderString); | ||
System.out.println("outputFolder: " + outputFolderString); | ||
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File inputFolder = new File(inputFolderString); | ||
File outputFolder = new File(outputFolderString); | ||
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if (!inputFolder.exists() || !inputFolder.isDirectory() || !inputFolder.canRead()) { | ||
System.out.println("inputFolder not found or cannot be read. Unable to proceed."); | ||
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return; | ||
} | ||
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if (!outputFolder.exists() || !outputFolder.isDirectory() || !outputFolder.canWrite()) { | ||
System.out.println("outputFolder not found or cannot be written to. Unable to proceed."); | ||
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return; | ||
} | ||
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TransformerFactory factory = TransformerFactory.newInstance(); | ||
Transformer headerTransformer = factory.newTransformer(new StreamSource(ClassLoader.class.getResourceAsStream(XSLT_TEMPLATES.HEADER))); | ||
Transformer contentTransformer = factory.newTransformer(new StreamSource(ClassLoader.class.getResourceAsStream(XSLT_TEMPLATES.CONTENT))); | ||
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processFolderContents(inputFolder.listFiles(), inputFolder.getName(), outputFolderString, headerTransformer, contentTransformer); | ||
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System.out.println("Done.."); | ||
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} catch (Exception e) { | ||
e.printStackTrace(); | ||
} | ||
} | ||
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private static void processFolderContents(File[] files, String parentFolderName, String outputFolderString, Transformer headerTransformer, | ||
Transformer contentTransformer) { | ||
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System.out.println("Processing folder: " + parentFolderName); | ||
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FileOutputStream outputStream = null; | ||
OutputStreamWriter writer = null; | ||
File outputFile = null; | ||
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boolean headerWritten = false; | ||
boolean fileFound = false; | ||
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try { | ||
for (File file : files) { | ||
String outputFileName = outputFolderString + parentFolderName + ".csv"; | ||
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if (file.isDirectory()) { | ||
processFolderContents(file.listFiles(), file.getName(), outputFolderString, headerTransformer, contentTransformer); | ||
} else if (file.isFile() && file.getName() != null && file.getName().toLowerCase().endsWith(".xml")) { // Only interested in XML files... | ||
if (!fileFound) { | ||
fileFound = true; | ||
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outputFile = new File(outputFileName); | ||
outputStream = new FileOutputStream(outputFile); | ||
writer = new OutputStreamWriter(outputStream, StandardCharsets.UTF_8); | ||
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System.out.println("Created file: " + outputFile.getName()); | ||
} | ||
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// All XML files in the folder should be the same so same header applies to all | ||
if (!headerWritten) { | ||
headerWritten = true; | ||
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headerTransformer.transform(new StreamSource(file), new StreamResult(writer)); | ||
} | ||
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contentTransformer.transform(new StreamSource(file), new StreamResult(writer)); | ||
} | ||
} | ||
} catch (Exception e) { | ||
e.printStackTrace(); | ||
} finally { | ||
if (writer != null) try { writer.close(); } catch(Exception e) {}; | ||
if (outputStream != null) try { outputStream.close(); } catch(Exception e) {}; | ||
} | ||
} | ||
} |
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modules/XML-to-CSV-converter/src/main/java/com/mw/uad/XMLToCSVTestHarness.java
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package com.mw.uad; | ||
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public class XMLToCSVTestHarness { | ||
public static void main(String[] args) { | ||
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String[] arguments = new String[2]; | ||
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arguments[0] = "C:\\mw_temp\\source\\"; | ||
arguments[1] = "C:\\mw_temp\\output\\"; | ||
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XMLToCSV.main(arguments); | ||
} | ||
} |
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18
modules/XML-to-CSV-converter/src/main/resources/content.xsl
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<?xml version="1.0" encoding="UTF-8"?> | ||
<xsl:stylesheet version="1.0" xmlns:xsl="http://www.w3.org/1999/XSL/Transform"> | ||
<xsl:output method="text"/> | ||
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<xsl:template match="/"> | ||
<xsl:apply-templates select="model"/> | ||
</xsl:template> | ||
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<xsl:template match="model"> | ||
<xsl:apply-templates select="model-name"/> | ||
<xsl:apply-templates select="column"/> | ||
<xsl:text> </xsl:text> | ||
</xsl:template> | ||
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<xsl:template match="column"> | ||
<xsl:value-of select="concat(',', normalize-space(column-value))"/> | ||
</xsl:template> | ||
</xsl:stylesheet> |
22 changes: 22 additions & 0 deletions
22
modules/XML-to-CSV-converter/src/main/resources/header.xsl
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<?xml version="1.0" encoding="UTF-8"?> | ||
<xsl:stylesheet version="1.0" xmlns:xsl="http://www.w3.org/1999/XSL/Transform"> | ||
<xsl:output method="text"/> | ||
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<xsl:template match="/"> | ||
<xsl:apply-templates select="model"/> | ||
</xsl:template> | ||
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<xsl:template match="model"> | ||
<xsl:apply-templates select="model-name"/> | ||
<xsl:apply-templates select="column"/> | ||
<xsl:text> </xsl:text> | ||
</xsl:template> | ||
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<xsl:template match="model-name"> | ||
<xsl:text>Model</xsl:text> | ||
</xsl:template> | ||
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<xsl:template match="column"> | ||
<xsl:value-of select="concat(',', normalize-space(column-name))"/> | ||
</xsl:template> | ||
</xsl:stylesheet> |