Java XML Attribute Get getAttributeWithInheritance(Element element, String attributeName)

Description

Returns an attribute value from this node, or first parent node with this attribute defined

License

Apache License

Return

A non-zero-length value if defined, otherwise null

Declaration

public static String getAttributeWithInheritance(Element element,
        String attributeName) 

Method Source Code

//package com.java2s;
/*// w w w  . j a  v a  2s . c o m
 * Licensed to the Apache Software Foundation (ASF) under one or more
 * contributor license agreements.  See the NOTICE file distributed with
 * this work for additional information regarding copyright ownership.
 * The ASF licenses this file to You 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.
 */

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

public class Main {
    /**
     * Returns an attribute value from this node, or first parent node with this attribute defined
     *
     * @return A non-zero-length value if defined, otherwise null
     */
    public static String getAttributeWithInheritance(Element element,
            String attributeName) {
        String result = element.getAttribute(attributeName);
        if ((result == null) || ("".equals(result))) {
            Node n = element.getParentNode();
            if ((n == element) || (n == null)) {
                return null;
            }
            if (n instanceof Element) {
                Element parent = (Element) n;
                return getAttributeWithInheritance(parent, attributeName);
            }
            return null; //we reached the top level of the document without finding attribute
        }
        return result;
    }

    public static String getAttribute(Element element,
            String attributeName, String deflt) {
        String result = element.getAttribute(attributeName);
        return (result == null) || ("".equals(result)) ? deflt : result;
    }

    public static float getAttribute(Element element, String attributeName,
            float deflt) {
        String result = element.getAttribute(attributeName);
        return (result == null) || ("".equals(result)) ? deflt : Float
                .parseFloat(result);
    }

    public static int getAttribute(Element element, String attributeName,
            int deflt) {
        String result = element.getAttribute(attributeName);
        return (result == null) || ("".equals(result)) ? deflt : Integer
                .parseInt(result);
    }

    public static boolean getAttribute(Element element,
            String attributeName, boolean deflt) {
        String result = element.getAttribute(attributeName);
        return (result == null) || ("".equals(result)) ? deflt : Boolean
                .valueOf(result);
    }
}

Related

1. getAttributeValueNS(Element element, String namespace, String attrName)
2. getAttributeValueOrNull(NamedNodeMap attributes, String attributeName)
3. getAttributeValuePair(Node node)
4. getAttributeValues(Element el)
5. getAttributeValues(Node node, String nodeName, String attrName)
6. getAttributName(Node node)
7. getAttributValue(Node n, String name)
8. getAttrInt(Element root, String attrName)
9. getAttrList(Node node)