org.onsteroids.eve.api.XmlUtility.java Source code

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Here is the source code for org.onsteroids.eve.api.XmlUtility.java

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/**
 * Copyright 2010 Tobias Sarnowski
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

/**
 * (c) 2010 Tobias Sarnowski
 * All rights reserved.
 */
package org.onsteroids.eve.api;

import com.google.common.base.Preconditions;
import com.google.common.collect.Lists;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.w3c.dom.Node;
import org.w3c.dom.NodeList;

import java.util.List;

/**
 * @author Tobias Sarnowski
 */
public final class XmlUtility {
    private static final Logger LOG = LoggerFactory.getLogger(XmlUtility.class);

    private Node node;

    public XmlUtility(Node node) {
        this.node = Preconditions.checkNotNull(node, "Node");
    }

    public Node getNodeByName(String name) {
        return getNodeByName(name, node);
    }

    public static Node getNodeByName(String name, Node parent) {
        Preconditions.checkNotNull(name, "Name");
        Preconditions.checkNotNull(parent, "Parent");
        NodeList list = parent.getChildNodes();
        for (int n = 0; n < list.getLength(); n++) {
            Node node = list.item(n);
            if (name.equals(node.getNodeName())) {
                return node;
            }
        }
        throw new IllegalArgumentException("Node " + name + " not found");
    }

    public boolean hasNodeWithName(String name) {
        return hasNodeWithName(name, node);
    }

    public static boolean hasNodeWithName(String name, Node parent) {
        Preconditions.checkNotNull(name, "Name");
        Preconditions.checkNotNull(parent, "Parent");
        NodeList list = parent.getChildNodes();
        for (int n = 0; n < list.getLength(); n++) {
            Node node = list.item(n);
            if (name.equals(node.getNodeName())) {
                return true;
            }
        }
        return false;
    }

    public List<Node> getNodesByName(String name) {
        return getNodesByName(name, node);
    }

    public static List<Node> getNodesByName(String name, Node parent) {
        Preconditions.checkNotNull(name, "Name");
        Preconditions.checkNotNull(parent, "Parent");
        List<Node> nodes = Lists.newArrayList();
        NodeList list = parent.getChildNodes();
        for (int n = 0; n < list.getLength(); n++) {
            Node node = list.item(n);
            if (name.equals(node.getNodeName())) {
                nodes.add(node);
            }
        }
        return nodes;
    }

    public String getContentOf(String nodeName) {
        return getContentOf(nodeName, node);
    }

    public static String getContentOf(String nodeName, Node node) {
        Preconditions.checkNotNull(nodeName, "nodeName");
        Preconditions.checkNotNull(node, "node");
        return getNodeByName(nodeName, node).getTextContent();
    }

    public String getAttribute(String name) {
        return getAttribute(name, node);
    }

    public static String getAttribute(String name, Node node) {
        Preconditions.checkNotNull(name, "Name");
        Preconditions.checkNotNull(node, "Node");
        Preconditions.checkNotNull(node.getAttributes().getNamedItem(name), "Attribute not found: " + name);
        return node.getAttributes().getNamedItem(name).getTextContent();
    }
}