/*
* Copyright 2014 the original author or authors.
*
* 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.springframework.data.elasticsearch.core.facet.request;
import java.util.concurrent.TimeUnit;
import org.apache.commons.lang.StringUtils;
import org.elasticsearch.search.facet.FacetBuilder;
import org.elasticsearch.search.facet.FacetBuilders;
import org.elasticsearch.search.facet.histogram.HistogramFacetBuilder;
import org.springframework.data.elasticsearch.core.facet.AbstractFacetRequest;
import org.springframework.util.Assert;
/**
* @author Artur Konczak
* @author Mohsin Husen
*/
public class HistogramFacetRequest extends AbstractFacetRequest {
private String field;
private long interval;
private TimeUnit timeUnit;
public HistogramFacetRequest(String name) {
super(name);
}
public void setField(String field) {
this.field = field;
}
public void setInterval(long interval) {
this.interval = interval;
}
public void setTimeUnit(TimeUnit timeUnit) {
this.timeUnit = timeUnit;
}
public FacetBuilder getFacet() {
Assert.notNull(getName(), "Facet name can't be a null !!!");
Assert.isTrue(StringUtils.isNotBlank(field), "Please select field on which to build the facet !!!");
Assert.isTrue(interval > 0, "Please provide interval as positive value greater them zero !!!");
HistogramFacetBuilder builder = FacetBuilders.histogramFacet(getName());
builder.field(field);
if (timeUnit != null) {
builder.interval(interval, timeUnit);
} else {
builder.interval(interval);
}
return builder;
}
}