Main.java Source code

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Here is the source code for Main.java

Source

//package com.java2s;
/**
 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS HEADER.
 *
 * Copyright (c) 2006 Sun Microsystems Inc. All Rights Reserved
 *
 * The contents of this file are subject to the terms
 * of the Common Development and Distribution License
 * (the License). You may not use this file except in
 * compliance with the License.
 *
 * You can obtain a copy of the License at
 * https://opensso.dev.java.net/public/CDDLv1.0.html or
 * opensso/legal/CDDLv1.0.txt
 * See the License for the specific language governing
 * permission and limitations under the License.
 *
 * When distributing Covered Code, include this CDDL
 * Header Notice in each file and include the License file
 * at opensso/legal/CDDLv1.0.txt.
 * If applicable, add the following below the CDDL Header,
 * with the fields enclosed by brackets [] replaced by
 * your own identifying information:
 * "Portions Copyrighted [year] [name of copyright owner]"
 *
 * $Id: XMLUtils.java,v 1.15 2009/10/19 18:19:20 asyhuang Exp $
 *
 */

import org.w3c.dom.Element;

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

import java.util.Collections;
import java.util.HashMap;
import java.util.HashSet;

import java.util.Map;
import java.util.Set;

public class Main {
    private static final Map EMPTY_MAP = Collections.unmodifiableMap(new HashMap());

    /**
     * @param parentNode
     *            is the element tag that contains all the AttirbuteValuePair
     *            tags as children
     * @return Map Returns the AV pairs in a Map where each entry in the Map is
     *         an AV pair. The key is the attribute name and the value is a Set
     *         of String objects.
     */
    public static Map<String, Set<String>> parseAttributeValuePairTags(Node parentNode) {
        NodeList keyValueList = parentNode.getChildNodes();
        int keyValueSize = keyValueList.getLength();

        if (keyValueSize <= 0) {
            return EMPTY_MAP;
        }

        Map<String, Set<String>> resultMap = null;

        for (int l = 0; l < keyValueSize; l++) {
            Node keyValueNode = keyValueList.item(l);

            if (keyValueNode.getNodeType() != Node.ELEMENT_NODE
                    || !keyValueNode.getNodeName().equals("AttributeValuePair")) {
                continue;
            }

            NodeList keyValueEntryList = keyValueNode.getChildNodes();
            int keyValueEntrySize = keyValueEntryList.getLength();
            if (keyValueEntrySize < 2) {
                // TODO: More error handling required later for missing
                // 'Attribute' or 'Value' tags.
                continue;
            }

            Node keyNode = null;

            // Since Attribute tag is always the first leaf node as per the DTD, and values can one or more,
            // Attribute tag can be parsed first and then iterate over the values, if any.
            for (int i = 0; i < keyValueEntrySize; i++) {
                keyNode = keyValueEntryList.item(i);

                if (keyNode.getNodeType() == Node.ELEMENT_NODE && keyNode.getNodeName().equals("Attribute")) {
                    break;
                }
            }

            final String key = ((Element) keyNode).getAttribute("name");
            Set<String> values = null;

            // Now parse the Value tags. If there are not 'Value' tags, ignore this key
            // TODO: More error handling required later for zero 'Value' tags.
            for (int m = 0; m < keyValueEntrySize; m++) {
                Node valueNode = keyValueEntryList.item(m);

                if (valueNode.getNodeType() != Node.ELEMENT_NODE || !valueNode.getNodeName().equals("Value")) {
                    // TODO: Error handling required here
                    continue;
                }

                if (values == null) {
                    values = new HashSet<String>();
                }

                Node firstChild = valueNode.getFirstChild();
                if (firstChild != null) {
                    String value = firstChild.getNodeValue();

                    if (value != null) {
                        values.add(value.trim());
                    }
                }
            }

            if (values == null) {
                // No 'Value' tags found. So ignore this key.
                // TODO: More error handling required later for zero
                // 'Value' tags.
                continue;
            }

            if (resultMap == null) {
                resultMap = new HashMap<String, Set<String>>();
            }

            Set<String> oldValues = resultMap.get(key);
            if (oldValues != null) {
                values.addAll(oldValues);
            }
            resultMap.put(key, values);
        }

        return resultMap == null ? EMPTY_MAP : resultMap;
    }

    public static Set getChildNodes(Node parentNode, String childName) {
        Set retVal = new HashSet();
        NodeList children = parentNode.getChildNodes();
        for (int i = 0; i < children.getLength(); i++) {
            Node node = children.item(i);
            if (node.getNodeName().equalsIgnoreCase(childName)) {
                retVal.add(node);
            }
        }
        return (retVal);
    }
}