com.attribyte.essem.es.MinMaxQuery.java Source code

Introduction

Here is the source code for com.attribyte.essem.es.MinMaxQuery.java

Source

/*
 * Copyright 2014 Attribyte, LLC
 *
 * 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.attribyte.essem.es;

import com.fasterxml.jackson.core.JsonGenerator;
import com.google.common.base.Strings;
import com.google.common.collect.ImmutableMap;

import java.io.IOException;

public class MinMaxQuery extends Query {

    /**
     * The min/max mode.
     */
    public static enum Mode {

        /**
         * Minimum value, inclusive.
         */
        MIN_INCLUSIVE("gte"),

        /**
         * Minimum value, exclusive.
         */
        MIN_EXCLUSIVE("gt"),

        /**
         * Maximum value, inclusive.
         */
        MAX_INCLUSIVE("lte"),

        /**
         * Mximum value, exclusive.
         */
        MAX_EXCLUSIVE("lt");

        private Mode(final String op) {
            this.op = op;
        }

        /**
         * Gets the mode from a string.
         * @param str The string value.
         * @return The mode or <code>null</code>.
         */
        public Mode fromString(final String str) {
            return modeMap.get(Strings.nullToEmpty(str).trim().toLowerCase());
        }

        public static final ImmutableMap<String, Mode> modeMap = ImmutableMap.of("gte", MIN_INCLUSIVE, "gt",
                MIN_EXCLUSIVE, "lte", MAX_INCLUSIVE, "lt", MAX_EXCLUSIVE);

        /**
         * One of 'gte', 'gt', 'lte', 'lt'.
         */
        public final String op;
    }

    /**
     * Create a min/max value query.
     * @param term The term name.
     * @param mode The min-max mode.
     * @param endpointValue The endpoint value.
     */
    public MinMaxQuery(final String term, final Mode mode, final Number endpointValue) {
        this.term = term;
        this.mode = mode;
        this.endpointValue = endpointValue;
    }

    @Override
    public void generate(final JsonGenerator generator) throws IOException {
        generator.writeStartObject();
        {
            generator.writeObjectFieldStart("range");
            {
                generator.writeObjectFieldStart(term);
                {
                    if (endpointValue instanceof Float || endpointValue instanceof Double) {
                        generator.writeNumberField(mode.op, endpointValue.doubleValue());
                    } else {
                        generator.writeNumberField(mode.op, endpointValue.longValue());
                    }
                }
                generator.writeEndObject();
            }
            generator.writeEndObject();
        }
        generator.writeEndObject();
    }

    /**
     * The term name.
     */
    public final String term;

    /**
     * The min/max mode.
     */
    public final Mode mode;

    /**
     * The endpoint value.
     */
    public final Number endpointValue;
}