io.druid.query.groupby.having.DimensionSelectorHavingSpec Maven / Gradle / Ivy
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* Licensed to Metamarkets Group Inc. (Metamarkets) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. Metamarkets 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 io.druid.query.groupby.having;
import com.fasterxml.jackson.annotation.JsonCreator;
import com.fasterxml.jackson.annotation.JsonProperty;
import com.google.common.base.Preconditions;
import com.google.common.base.Strings;
import io.druid.data.input.Row;
import io.druid.query.extraction.ExtractionFn;
import io.druid.query.extraction.IdentityExtractionFn;
import java.util.List;
import java.util.Objects;
public class DimensionSelectorHavingSpec extends BaseHavingSpec
{
private final String dimension;
private final String value;
private final ExtractionFn extractionFn;
@JsonCreator
public DimensionSelectorHavingSpec(
@JsonProperty("dimension") String dimName,
@JsonProperty("value") String value,
@JsonProperty("extractionFn") ExtractionFn extractionFn
)
{
dimension = Preconditions.checkNotNull(dimName, "Must have attribute 'dimension'");
this.value = value;
this.extractionFn = extractionFn != null ? extractionFn : IdentityExtractionFn.getInstance();
}
@JsonProperty("value")
public String getValue()
{
return value;
}
@JsonProperty("dimension")
public String getDimension()
{
return dimension;
}
@JsonProperty
public ExtractionFn getExtractionFn()
{
return extractionFn;
}
@Override
public boolean eval(Row row)
{
List dimRowValList = row.getDimension(dimension);
if (dimRowValList == null || dimRowValList.isEmpty()) {
return Strings.isNullOrEmpty(value);
}
for (String rowVal : dimRowValList) {
String extracted = getExtractionFn().apply(rowVal);
if (value != null && value.equals(extracted)) {
return true;
}
if (extracted == null || extracted.isEmpty()) {
return Strings.isNullOrEmpty(value);
}
}
return false;
}
@Override
public boolean equals(final Object o)
{
if (this == o) {
return true;
}
if (o == null || getClass() != o.getClass()) {
return false;
}
final DimensionSelectorHavingSpec that = (DimensionSelectorHavingSpec) o;
return Objects.equals(dimension, that.dimension) &&
Objects.equals(value, that.value) &&
Objects.equals(extractionFn, that.extractionFn);
}
@Override
public int hashCode()
{
return Objects.hash(dimension, value, extractionFn);
}
@Override
public String toString()
{
return "DimensionSelectorHavingSpec{" +
"dimension='" + dimension + '\'' +
", value='" + value + '\'' +
", extractionFn=" + extractionFn +
'}';
}
}