ModXml

!Modify XML Value Using Java.

Modify XML Value Using Java.

$ javac -encoding UTF-8 IOUtils.java ModXmlUtils.java ModXml.java
$ java ModXml -element "/hoge/gebu" -attribute "foo" -value "bar" -input "in.xml" -output "out.xml"

IOUtils.java

import java.io.InputStream;
import java.io.OutputStream;

public final class IOUtils {
	public static void closeQuietly(InputStream stream) {
		if(stream != null) {
			try {
				stream.close();
			} catch(Exception e) {
			}
		}
	}

	public static void closeQuietly(OutputStream stream) {
		if(stream != null) {
			try {
				stream.close();
			} catch(Exception e) {
			}
		}
	}
}

ModXml.java

import java.util.List;
import java.util.ArrayList;

import java.io.File;
import java.io.InputStream;
import java.io.FileInputStream;
import java.io.OutputStream;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.FileNotFoundException;

import javax.xml.parsers.DocumentBuilder;
import javax.xml.parsers.DocumentBuilderFactory;
import javax.xml.parsers.ParserConfigurationException;

import javax.xml.transform.Transformer;
import javax.xml.transform.TransformerFactory;
import javax.xml.transform.TransformerException;
import javax.xml.transform.dom.DOMSource;
import javax.xml.transform.stream.StreamResult;
import javax.xml.xpath.XPath;
import javax.xml.xpath.XPathConstants;
import javax.xml.xpath.XPathFactory;
import javax.xml.xpath.XPathExpressionException;

import org.w3c.dom.Document;
import org.w3c.dom.Node;
import org.w3c.dom.NodeList;
import org.w3c.dom.Element;
import org.xml.sax.SAXException;

public class ModXml {
	/**
	 * proc.
	 *
	 * @param paramElementXpath elementのXPath
	 * @param paramAttributes 属性名
	 * @param paramOutputValue 出力値
	 * @param paramInputXmlFileName 読み込みXMLファイル名
	 * @param paramOutputXmlFileName 出力XMLファイル名
	 * @param paramIsForceAttribute 属性強制出力 (対象elementに属性がない場合でも書き出し)
	*/
	private static void proc(final String paramElementXpath, final String paramAttributes, final String paramOutputValue, final String paramInputXmlFileName, final String paramOutputXmlFileName, final boolean paramIsForceAttribute) throws ParserConfigurationException, SAXException, IOException, XPathExpressionException, TransformerException {
		final XPath xpath = XPathFactory.newInstance().newXPath();

		final Document document = ModXmlUtils.parseDocument(paramInputXmlFileName);

		NodeList nodeList = (NodeList)xpath.evaluate(paramElementXpath, document, XPathConstants.NODESET);
		if((nodeList == null) && (nodeList.getLength() == 0)) {
			System.err.println(String.format("element is not found... '%s'", paramElementXpath));
		} else {
			for(int i = 0; i  < nodeList.getLength(); i++) {
				final Node node = nodeList.item(i);
				final Element element = (Element)node;
				final String  fullNodePath = ModXmlUtils.getFullNodePath(node);

				if(paramAttributes == null) {
					element.setTextContent(paramOutputValue);
					System.out.println(String.format("set text content to '%s' for '%s'.", paramOutputValue, fullNodePath));
				} else {
					if(paramIsForceAttribute) {
						// 強制書き出し
						element.setAttribute(paramAttributes, paramOutputValue);
						System.out.println(String.format("set attribute to '%s' for '%s:%s'.", paramOutputValue, fullNodePath, paramAttributes));
					} else {
						if(element.hasAttribute(paramAttributes)) {
							element.setAttribute(paramAttributes, paramOutputValue);
						System.out.println(String.format("set attribute to '%s' for '%s:%s'.", paramOutputValue, fullNodePath, paramAttributes));
						} else {
							System.err.println(String.format("attribute is not found '%s:%s'.", fullNodePath, paramAttributes));
						}
					}
				}
			}
		}

		ModXmlUtils.writeXml(paramOutputXmlFileName, document);
	}

	public static void main(final String[] args) throws ParserConfigurationException, SAXException, IOException, XPathExpressionException, TransformerException {
		boolean paramIsForceAttribute = false;
		String paramElementXpath = null;
		String paramAttributes = null;
		String paramOutputValue = null;
		String paramInputXmlFileName = null;
		String paramOutputXmlFileName = null;

		boolean requestHelp = false;;
		boolean isError = false;
		List<String> errors = new ArrayList<String>();

		for(int i = 0; i < args.length; i++) {
			final String arg = args[i];
			final String param;
			if((i + 1) < args.length) {
				param = args[i + 1];
			} else {
				param = null;
			}
			if(arg != null) {
				if(arg.equals("--h") || arg.equals("-help")) {
					requestHelp = true;
				} else if(arg.equals("--f") || arg.equals("-force")) {
					paramIsForceAttribute = true;
				} else if(arg.equals("--e") || arg.equals("-element")) {
					paramElementXpath = param;
					i += 1;
				} else if(arg.equals("--a") || arg.equals("-attribute")) {
					paramAttributes = param;
					i += 1;
				} else if(arg.equals("--v") || arg.equals("-value")) {
					paramOutputValue = param;
					i += 1;
				} else if(arg.equals("--i") || arg.equals("-input")) {
					paramInputXmlFileName = param;
					i += 1;
				} else if(arg.equals("--o") || arg.equals("-output") ) {
					paramOutputXmlFileName = param;
					i += 1;
				}
			}
		}

		if(paramElementXpath == null) {
			errors.add("no param at -element");
			isError = true;
		}
		if(paramAttributes == null) {
			errors.add("no param at -attribute");
			isError = true;
		}
		if(paramOutputValue == null) {
			errors.add("no param at -value");
			isError = true;
		}
		if(paramInputXmlFileName == null) {
			errors.add("no param at -input");
			isError = true;
		}
		if(paramOutputXmlFileName == null) {
			errors.add("no param at -output");
			isError = true;
		}
		
		if(requestHelp || isError) {
			System.out.println("ModXml");
			System.out.println();
			System.out.println("USAGE: java ModXml [OPTION] -element [XPath] ( -attribute [ATTRIBUTE NAME] ) -output [FILE NAME] -input [FILE NAME]");
			System.out.println("  ARGS:");
			System.out.println("    --e, -element     target element XPath.");
			System.out.println("    --a, -attribute   (optional) target attribute name. write value to this attribute, if defined.");
			System.out.println("    --v, -value       output value.");
			System.out.println("    --i, -input       input xml file name.");
			System.out.println("    --o, -output      output xml file name.");
			System.out.println();
			System.out.println("  OPTIONS:");
			System.out.println("    --h, -help        output help.");
			System.out.println("    --f, -force       force write value to attribute, if target attribute is not found on element.");

			for(String mes : errors) {
				System.out.println(mes);
			}
		} else {
			proc(paramElementXpath, paramAttributes, paramOutputValue, paramInputXmlFileName, paramOutputXmlFileName, paramIsForceAttribute);
		}
	}
}

XmlUtils.java

import java.util.List;
import java.util.ArrayList;

import java.io.File;
import java.io.InputStream;
import java.io.FileInputStream;
import java.io.OutputStream;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.FileNotFoundException;

import javax.xml.parsers.DocumentBuilder;
import javax.xml.parsers.DocumentBuilderFactory;
import javax.xml.parsers.ParserConfigurationException;

import javax.xml.transform.Transformer;
import javax.xml.transform.TransformerFactory;
import javax.xml.transform.TransformerException;
import javax.xml.transform.dom.DOMSource;
import javax.xml.transform.stream.StreamResult;
import javax.xml.xpath.XPath;
import javax.xml.xpath.XPathConstants;
import javax.xml.xpath.XPathFactory;
import javax.xml.xpath.XPathExpressionException;

import org.w3c.dom.Document;
import org.w3c.dom.Node;
import org.w3c.dom.NodeList;
import org.w3c.dom.Element;
import org.xml.sax.SAXException;

public class XmlUtils {
	public static Document parseDocument(String fileName) throws FileNotFoundException, ParserConfigurationException, SAXException, IOException {
		FileInputStream stream = null;
		try {
			stream = new FileInputStream(fileName);
			return parseDocument(stream);
		} finally {
			IOUtils.closeQuietly(stream);
		}
	}

	public static Document parseDocument(final InputStream iStream) throws ParserConfigurationException, SAXException, IOException {
		DocumentBuilderFactory factory = DocumentBuilderFactory.newInstance();
		DocumentBuilder builder = factory.newDocumentBuilder();
		Document document = builder.parse(iStream);
		return document;
	}

	public static void writeXml(final String fileName, final Document document) throws FileNotFoundException, TransformerException {
		FileOutputStream stream = null;
		try {
			stream = new FileOutputStream(fileName);
			writeXml(stream, document);
		} finally {
			IOUtils.closeQuietly(stream);
		}
	}

	public static void writeXml(final OutputStream oStream, final Document document) throws TransformerException {
		TransformerFactory transformerFactory = TransformerFactory.newInstance();
		Transformer transformer = transformerFactory.newTransformer();
		DOMSource domSource = new DOMSource(document);
		StreamResult streamResult = new StreamResult(oStream);
		transformer.transform(domSource, streamResult);
	}

	public static String getFullNodePath(final Node node) {
		final Node parent = node.getParentNode();
		if(parent == null) {
			return node.getNodeName();
		} else {
			return getFullNodePath(parent) + "/" + node.getNodeName();
		}
	}
}