org.apache.lucene.queries.function.docvalues.DoubleDocValues.java Source code

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Here is the source code for org.apache.lucene.queries.function.docvalues.DoubleDocValues.java

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/*
 * 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.lucene.queries.function.docvalues;

import java.io.IOException;

import org.apache.lucene.index.LeafReaderContext;
import org.apache.lucene.queries.function.FunctionValues;
import org.apache.lucene.queries.function.ValueSource;
import org.apache.lucene.queries.function.ValueSourceScorer;
import org.apache.lucene.search.Weight;
import org.apache.lucene.util.mutable.MutableValue;
import org.apache.lucene.util.mutable.MutableValueDouble;

/**
 * Abstract {@link FunctionValues} implementation which supports retrieving double values.
 * Implementations can control how the double values are loaded through {@link #doubleVal(int)}}
 */
public abstract class DoubleDocValues extends FunctionValues {
    protected final ValueSource vs;

    public DoubleDocValues(ValueSource vs) {
        this.vs = vs;
    }

    @Override
    public byte byteVal(int doc) throws IOException {
        return (byte) doubleVal(doc);
    }

    @Override
    public short shortVal(int doc) throws IOException {
        return (short) doubleVal(doc);
    }

    @Override
    public float floatVal(int doc) throws IOException {
        return (float) doubleVal(doc);
    }

    @Override
    public int intVal(int doc) throws IOException {
        return (int) doubleVal(doc);
    }

    @Override
    public long longVal(int doc) throws IOException {
        return (long) doubleVal(doc);
    }

    @Override
    public boolean boolVal(int doc) throws IOException {
        return doubleVal(doc) != 0;
    }

    @Override
    public abstract double doubleVal(int doc) throws IOException;

    @Override
    public String strVal(int doc) throws IOException {
        return Double.toString(doubleVal(doc));
    }

    @Override
    public Object objectVal(int doc) throws IOException {
        return exists(doc) ? doubleVal(doc) : null;
    }

    @Override
    public String toString(int doc) throws IOException {
        return vs.description() + '=' + strVal(doc);
    }

    @Override
    public ValueSourceScorer getRangeScorer(Weight weight, LeafReaderContext readerContext, String lowerVal,
            String upperVal, boolean includeLower, boolean includeUpper) {
        double lower, upper;

        if (lowerVal == null) {
            lower = Double.NEGATIVE_INFINITY;
        } else {
            lower = Double.parseDouble(lowerVal);
        }

        if (upperVal == null) {
            upper = Double.POSITIVE_INFINITY;
        } else {
            upper = Double.parseDouble(upperVal);
        }

        final double l = lower;
        final double u = upper;

        if (includeLower && includeUpper) {
            return new ValueSourceScorer(weight, readerContext, this) {
                @Override
                public boolean matches(int doc) throws IOException {
                    if (!exists(doc))
                        return false;
                    double docVal = doubleVal(doc);
                    return docVal >= l && docVal <= u;
                }
            };
        } else if (includeLower && !includeUpper) {
            return new ValueSourceScorer(weight, readerContext, this) {
                @Override
                public boolean matches(int doc) throws IOException {
                    if (!exists(doc))
                        return false;
                    double docVal = doubleVal(doc);
                    return docVal >= l && docVal < u;
                }
            };
        } else if (!includeLower && includeUpper) {
            return new ValueSourceScorer(weight, readerContext, this) {
                @Override
                public boolean matches(int doc) throws IOException {
                    if (!exists(doc))
                        return false;
                    double docVal = doubleVal(doc);
                    return docVal > l && docVal <= u;
                }
            };
        } else {
            return new ValueSourceScorer(weight, readerContext, this) {
                @Override
                public boolean matches(int doc) throws IOException {
                    if (!exists(doc))
                        return false;
                    double docVal = doubleVal(doc);
                    return docVal > l && docVal < u;
                }
            };
        }
    }

    @Override
    public ValueFiller getValueFiller() {
        return new ValueFiller() {
            private final MutableValueDouble mval = new MutableValueDouble();

            @Override
            public MutableValue getValue() {
                return mval;
            }

            @Override
            public void fillValue(int doc) throws IOException {
                mval.value = doubleVal(doc);
                mval.exists = exists(doc);
            }
        };
    }

}