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

Introduction

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

Source

/*
 * Copyright 2011-2017 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.base.Preconditions.checkNotNull;

import org.apache.lucene.document.Document;
import org.apache.lucene.document.Field.Store;
import org.apache.lucene.document.LongPoint;
import org.apache.lucene.document.StoredField;
import org.apache.lucene.index.IndexableField;
import org.apache.lucene.search.Query;
import org.apache.lucene.search.SortField.Type;
import org.apache.lucene.util.BytesRef;
import org.apache.lucene.util.NumericUtils;

import com.b2international.collections.PrimitiveLists;
import com.b2international.collections.PrimitiveSets;
import com.b2international.collections.longs.LongCollection;
import com.b2international.collections.longs.LongList;
import com.b2international.collections.longs.LongSet;
import com.google.common.collect.ImmutableSet;

/**
 * @since 4.3
 */
public class LongIndexField extends IndexFieldBase<Long> implements LongCollectionIndexField {

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

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

    @Override
    public Query toQuery(Long value) {
        return LongPoint.newExactQuery(fieldName(), value);
    }

    @Override
    protected Query toSetQuery(Iterable<Long> values) {
        return LongPoint.newSetQuery(fieldName(), ImmutableSet.copyOf(values));
    }

    @Override
    public void addTo(Document doc, Long value) {
        super.addTo(doc, value);
        if (Store.YES == isStored()) {
            doc.add(new StoredField(fieldName(), value));
        }
    }

    @Override
    protected IndexableField toField(Long value) {
        return new LongPoint(fieldName(), value);
    }

    @Override
    protected BytesRef toBytesRef(Long value) {
        byte[] packed = new byte[Long.BYTES];
        NumericUtils.longToSortableBytes(value, packed, 0);
        return new BytesRef(packed);
    }

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

    @Override
    public Long getValue(IndexableField field) {
        final Number num = field.numericValue();
        checkNotNull(num, "Cannot get numeric value from field '%s'");
        return num.longValue();
    }

    @Override
    public final LongSet getValueAsLongSet(Document doc) {
        final IndexableField[] fields = getFields(doc);
        final LongSet longIds = PrimitiveSets.newLongOpenHashSet(fields.length + 1);
        addIdsToLongCollection(fields, longIds);
        return longIds;
    }

    @Override
    public final LongList getValueAsLongList(Document doc) {
        final IndexableField[] fields = getFields(doc);
        final LongList longIds = PrimitiveLists.newLongArrayList(fields.length + 1);
        addIdsToLongCollection(fields, longIds);
        return longIds;
    }

    private void addIdsToLongCollection(final IndexableField[] fields, final LongCollection longIds) {
        for (final IndexableField field : fields) {
            longIds.add(getValue(field));
        }
    }

}