org.archive.tnh.FieldCacheNoCache.java Source code

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Here is the source code for org.archive.tnh.FieldCacheNoCache.java

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/*
 * Copyright 2010 Internet Archive
 *
 * 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.archive.tnh;

import java.util.List;
import java.util.Map;
import java.util.HashMap;
import java.io.IOException;
import java.io.File;

import org.apache.lucene.index.IndexReader;
import org.apache.lucene.document.FieldSelector;
import org.apache.lucene.document.FieldSelectorResult;
import org.apache.lucene.document.Document;

public class FieldCacheNoCache implements FieldCache {
    private String fieldName;

    private FieldSelector FIELD_ONLY = new FieldSelector() {
        public static final long serialVersionUID = 0L;

        public FieldSelectorResult accept(String fieldName) {
            if (FieldCacheNoCache.this.fieldName.equals(fieldName)) {
                return FieldSelectorResult.LOAD_AND_BREAK;
            }
            return FieldSelectorResult.NO_LOAD;
        }
    };

    public FieldCacheNoCache(String fieldName) {
        this.fieldName = fieldName;
    }

    /**
     *
     */
    public String getValue(IndexReader reader, int docBase, int docId) throws IOException {
        Document doc = reader.document(docId, FIELD_ONLY);

        String value = doc.get(this.fieldName);

        return value;
    }

}