org.tinymediamanager.scraper.util.DOMUtils.java Source code

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Here is the source code for org.tinymediamanager.scraper.util.DOMUtils.java

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/*
 * Copyright 2012 - 2015 Manuel Laggner
 *
 * 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.
 */
package org.tinymediamanager.scraper.util;

import org.apache.commons.lang3.StringUtils;
import org.apache.commons.lang3.math.NumberUtils;
import org.w3c.dom.Element;
import org.w3c.dom.Node;
import org.w3c.dom.NodeList;

/**
 * The Class DOMUtils.
 * 
 * @author Manuel Laggner
 */
public class DOMUtils {

    /**
     * Gets the element value.
     * 
     * @param el
     *          the el
     * @param tag
     *          the tag
     * @return the element value
     */
    public static String getElementValue(Element el, String tag) {
        if (el == null || tag == null)
            return null;
        NodeList nl = el.getElementsByTagName(tag);
        if (nl.getLength() > 0) {
            Node n = nl.item(0);
            return StringUtils.trim(n.getTextContent());
        }
        return null;
    }

    /**
     * Gets the element int value.
     * 
     * @param el
     *          the el
     * @param tag
     *          the tag
     * @return the element int value
     */
    public static int getElementIntValue(Element el, String tag) {
        NodeList nl = el.getElementsByTagName(tag);
        if (nl.getLength() > 0) {
            Node n = nl.item(0);
            return NumberUtils.toInt(StringUtils.trim(n.getTextContent()));
        }
        return 0;
    }

    /**
     * Gets the max element value.
     * 
     * @param el
     *          the el
     * @param tag
     *          the tag
     * @return the max element value
     */
    public static String getMaxElementValue(Element el, String tag) {
        NodeList nl = el.getElementsByTagName(tag);
        String retVal = null;
        for (int i = 0; i < nl.getLength(); i++) {
            String s = nl.item(i).getTextContent();
            if (retVal == null) {
                retVal = s;
            } else {
                if (s != null && s.length() > retVal.length()) {
                    retVal = s;
                }
            }
        }
        return retVal;
    }

    /**
     * Gets the element by tag name.
     * 
     * @param el
     *          the el
     * @param tag
     *          the tag
     * @return the element by tag name
     */
    public static Element getElementByTagName(Element el, String tag) {
        NodeList nl = el.getElementsByTagName(tag);
        if (nl.getLength() > 0) {
            return (Element) nl.item(0);
        }
        return null;
    }
}