| /* |
| * 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 java.util.Arrays; |
| import java.util.List; |
| |
| import org.xml.sax.helpers.DefaultHandler; |
| |
| import org.apache.tika.metadata.Metadata; |
| import org.apache.tika.metadata.Property; |
| |
| /** |
| * Base class for SAX handlers that map SAX events into document metadata. |
| * |
| * @since Apache Tika 0.10 |
| */ |
| class AbstractMetadataHandler extends DefaultHandler { |
| |
| private final Metadata metadata; |
| private final Property property; |
| private final String name; |
| |
| protected AbstractMetadataHandler(Metadata metadata, String name) { |
| this.metadata = metadata; |
| this.property = null; |
| this.name = name; |
| } |
| |
| protected AbstractMetadataHandler(Metadata metadata, Property property) { |
| this.metadata = metadata; |
| this.property = property; |
| this.name = property.getName(); |
| } |
| |
| /** |
| * Adds the given metadata value. The value is ignored if it is |
| * <code>null</code> or empty. If the metadata entry already exists, |
| * then the given value is appended to it with a comma as the separator. |
| * |
| * @param value metadata value |
| */ |
| protected void addMetadata(String value) { |
| if (value != null && value.length() > 0) { |
| if (metadata.isMultiValued(name)) { |
| // Add the value, assuming it's not already there |
| List<String> previous = Arrays.asList(metadata.getValues(name)); |
| if (!previous.contains(value)) { |
| if (property != null) { |
| metadata.add(property, value); |
| } else { |
| metadata.add(name, value); |
| } |
| } |
| } else { |
| // Set the value, assuming it's not already there |
| String previous = metadata.get(name); |
| if (previous != null && previous.length() > 0) { |
| if (!previous.equals(value)) { |
| if (property != null) { |
| if (property.isMultiValuePermitted()) { |
| metadata.add(property, value); |
| } else { |
| // Replace the existing value if isMultiValuePermitted is false |
| metadata.set(property, value); |
| } |
| } else { |
| metadata.add(name, value); |
| } |
| } |
| } else { |
| if (property != null) { |
| metadata.set(property, value); |
| } else { |
| metadata.set(name, value); |
| } |
| } |
| } |
| } |
| } |
| } |