| /* |
| * 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. |
| */ |
| package org.apache.tika.parser.xml; |
| |
| import org.xml.sax.Attributes; |
| import org.xml.sax.helpers.DefaultHandler; |
| |
| import org.apache.tika.metadata.Metadata; |
| |
| /** |
| * This adds a Metadata entry for a given node. |
| * The textual content of the node is used as the |
| * value, and the Metadata name is taken from |
| * an attribute, with a prefix if required. |
| */ |
| public class AttributeDependantMetadataHandler extends DefaultHandler { |
| |
| private final Metadata metadata; |
| |
| private final String nameHoldingAttribute; |
| private final String namePrefix; |
| private final StringBuilder buffer = new StringBuilder(); |
| private String name; |
| |
| public AttributeDependantMetadataHandler(Metadata metadata, String nameHoldingAttribute, |
| String namePrefix) { |
| this.metadata = metadata; |
| this.nameHoldingAttribute = nameHoldingAttribute; |
| this.namePrefix = namePrefix; |
| } |
| |
| public void addMetadata(String value) { |
| if (name == null || name.length() == 0) { |
| // We didn't find the attribute which holds the name |
| return; |
| } |
| if (value.length() > 0) { |
| String previous = metadata.get(name); |
| if (previous != null && previous.length() > 0) { |
| value = previous + ", " + value; |
| } |
| metadata.set(name, value); |
| } |
| } |
| |
| public void endElement(String uri, String localName, String name) { |
| addMetadata(buffer.toString()); |
| buffer.setLength(0); |
| } |
| |
| public void startElement(String uri, String localName, String name, Attributes attributes) { |
| String rawName = attributes.getValue(nameHoldingAttribute); |
| if (rawName != null) { |
| if (namePrefix == null) { |
| this.name = rawName; |
| } else { |
| this.name = namePrefix + rawName; |
| } |
| } |
| // All other attributes are ignored |
| } |
| |
| |
| public void characters(char[] ch, int start, int length) { |
| buffer.append(ch, start, length); |
| } |
| |
| } |