/*
* Licensed to CRATE Technology GmbH ("Crate") under one or more contributor
* license agreements. See the NOTICE file distributed with this work for
* additional information regarding copyright ownership. Crate 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.
*
* However, if you have executed another commercial license agreement
* with Crate these terms will supersede the license and you may use the
* software solely pursuant to the terms of the relevant commercial agreement.
*/
package io.crate.operation.reference.doc.lucene;
import io.crate.exceptions.GroupByOnArrayUnsupportedException;
import org.apache.lucene.index.DocValues;
import org.apache.lucene.index.LeafReaderContext;
import org.apache.lucene.util.BytesRef;
import org.elasticsearch.index.fielddata.FieldData;
import org.elasticsearch.index.fielddata.SortedBinaryDocValues;
import java.io.IOException;
public class BooleanColumnReference extends LuceneCollectorExpression<Boolean> {
private static final BytesRef TRUE_BYTESREF = new BytesRef("1");
private SortedBinaryDocValues values;
private Boolean value;
public BooleanColumnReference(String columnName) {
super(columnName);
}
@Override
public Boolean value() {
return value;
}
@Override
public void setNextDocId(int docId) {
super.setNextDocId(docId);
values.setDocument(docId);
switch (values.count()) {
case 0:
value = null;
break;
case 1:
value = values.valueAt(0).compareTo(TRUE_BYTESREF) == 0;
break;
default:
throw new GroupByOnArrayUnsupportedException(columnName);
}
}
@Override
public void setNextReader(LeafReaderContext context) throws IOException {
super.setNextReader(context);
values = FieldData.toString(DocValues.getSortedNumeric(context.reader(), columnName));
}
@Override
public boolean equals(Object obj) {
if (obj == null)
return false;
if (obj == this)
return true;
if (!(obj instanceof BooleanColumnReference))
return false;
return columnName.equals(((BooleanColumnReference) obj).columnName);
}
@Override
public int hashCode() {
return columnName.hashCode();
}
}