org.apache.solr.analysis.PathHierarchyTokenizerFactory.java Source code

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Here is the source code for org.apache.solr.analysis.PathHierarchyTokenizerFactory.java

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package org.apache.solr.analysis;
/**
 * 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 java.io.Reader;
import java.util.Map;

import org.apache.lucene.analysis.Tokenizer;
import org.apache.lucene.analysis.path.PathHierarchyTokenizer;
import org.apache.lucene.analysis.path.ReversePathHierarchyTokenizer;

/**
 * Factory for {@link PathHierarchyTokenizer}. 
 * <pre class="prettyprint" >
 * &lt;fieldType name="text_path" class="solr.TextField" positionIncrementGap="100"&gt;
 *   &lt;analyzer&gt;
 *     &lt;tokenizer class="solr.PathHierarchyTokenizerFactory" delimiter="\" replace="/"/&gt;
 *   &lt;/analyzer&gt;
 * &lt;/fieldType&gt;</pre> 
 * @version $Id$
 */
public class PathHierarchyTokenizerFactory extends BaseTokenizerFactory {

    private char delimiter;
    private char replacement;
    private boolean reverse = false;
    private int skip = PathHierarchyTokenizer.DEFAULT_SKIP;

    /**
     * Require a configured pattern
     */
    @Override
    public void init(Map<String, String> args) {
        super.init(args);

        String v = args.get("delimiter");
        if (v != null) {
            if (v.length() != 1) {
                throw new IllegalArgumentException("delimiter should be a char. \"" + v + "\" is invalid");
            } else {
                delimiter = v.charAt(0);
            }
        } else {
            delimiter = PathHierarchyTokenizer.DEFAULT_DELIMITER;
        }

        v = args.get("replace");
        if (v != null) {
            if (v.length() != 1) {
                throw new IllegalArgumentException("replace should be a char. \"" + v + "\" is invalid");
            } else {
                replacement = v.charAt(0);
            }
        } else {
            replacement = delimiter;
        }

        v = args.get("reverse");
        if (v != null) {
            reverse = "true".equals(v);
        }

        v = args.get("skip");
        if (v != null) {
            skip = Integer.parseInt(v);
        }
    }

    public Tokenizer create(Reader input) {
        if (reverse) {
            return new ReversePathHierarchyTokenizer(input, delimiter, replacement, skip);
        }
        return new PathHierarchyTokenizer(input, delimiter, replacement, skip);
    }
}