Main.java Source code

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Here is the source code for Main.java

Source

//package com.java2s;
//License from project: LGPL 

import java.util.*;
import java.util.regex.Matcher;
import java.util.regex.Pattern;

import org.w3c.dom.Attr;

import org.w3c.dom.Element;
import org.w3c.dom.NamedNodeMap;
import org.w3c.dom.Node;
import org.w3c.dom.NodeList;

public class Main {
    /**
     * Pattern used to match variables in XML fragments.
     */
    private static Pattern variablePattern = Pattern.compile("\\$\\(([^\\)]+)\\)");

    /**
     * Extract default values of variables defined in the DOM subtree below node.
     * Default values are used to populate the variableDefs map.  Variables
     * already defined in this map will NOT be modified.
     *
     * @param node root node of DOM subtree to extract default values from.
     * @param variableDefs map which default values will be added to.
     */
    public static void extractVariableDefaults(final Node node, Map<String, String> variableDefs) {
        switch (node.getNodeType()) {
        case Node.ELEMENT_NODE:
            final Element element = (Element) node;
            final NamedNodeMap attrs = element.getAttributes();
            for (int i = 0; i < attrs.getLength(); i++) {
                Attr attr = (Attr) attrs.item(i);
                extractVariableDefaultsFromString(attr.getValue(), variableDefs);
            }
            break;

        case Node.CDATA_SECTION_NODE:
            String content = node.getTextContent();
            extractVariableDefaultsFromString(content, variableDefs);
            break;

        default:
            break;
        }

        final NodeList children = node.getChildNodes();
        for (int childIndex = 0; childIndex < children.getLength(); childIndex++)
            extractVariableDefaults(children.item(childIndex), variableDefs);
    }

    /**
     * Extract default values of variables defined in the given string.
     * Default values are used to populate the variableDefs map.  Variables
     * already defined in this map will NOT be modified.
     *
     * @param string string to extract default values from.
     * @param variableDefs map which default values will be added to.
     */
    public static void extractVariableDefaultsFromString(String string, Map<String, String> variableDefs) {
        Matcher variableMatcher = variablePattern.matcher(string);
        while (variableMatcher.find()) {
            String varString = variableMatcher.group(1);

            int eqIdx = varString.indexOf("=");

            if (eqIdx > -1) {
                String varName = varString.substring(0, eqIdx).trim();

                if (!variableDefs.containsKey(varName))
                    variableDefs.put(varName, varString.substring(eqIdx + 1, varString.length()));
            }
        }
    }
}