com.b2international.index.lucene.StringIndexFieldBase.java Source code

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Here is the source code for com.b2international.index.lucene.StringIndexFieldBase.java

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/*
 * Copyright 2011-2016 B2i Healthcare Pte Ltd, http://b2i.sg
 * 
 * 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 com.b2international.index.lucene;

import static com.google.common.collect.Sets.newTreeSet;

import java.util.SortedSet;

import org.apache.lucene.index.IndexableField;
import org.apache.lucene.search.Query;
import org.apache.lucene.search.SortField.Type;
import org.apache.lucene.search.TermInSetQuery;
import org.apache.lucene.search.TermQuery;
import org.apache.lucene.util.BytesRef;

/**
 * @since 4.3
 */
public abstract class StringIndexFieldBase extends IndexFieldBase<String> {

    public StringIndexFieldBase(String fieldName) {
        this(fieldName, true);
    }

    public StringIndexFieldBase(String fieldName, boolean stored) {
        super(fieldName, stored);
    }

    @Override
    public final Query toQuery(String value) {
        return new TermQuery(toTerm(value));
    }

    @Override
    protected Query toSetQuery(Iterable<String> values) {
        final SortedSet<BytesRef> uniqueBytesRefs = newTreeSet();
        for (String value : values) {
            uniqueBytesRefs.add(toBytesRef(value));
        }
        return new TermInSetQuery(fieldName(), uniqueBytesRefs);
    }

    @Override
    protected BytesRef toBytesRef(String value) {
        return new BytesRef(value);
    }

    @Override
    protected Type getSortFieldType() {
        return Type.STRING;
    }

    @Override
    public String getValue(IndexableField field) {
        return field.stringValue();
    }

}