/*
* 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;
import io.crate.metadata.ReferenceImplementation;
import io.crate.metadata.RowCollectExpression;
import org.apache.lucene.util.BytesRef;
import java.util.Collections;
import java.util.HashMap;
import java.util.Map;
public abstract class RowCollectNestedObjectExpression<R> extends NestedObjectExpression implements RowCollectExpression<R, Map<String, Object>> {
protected R row;
public void setNextRow(R row) {
this.row = row;
}
@Override
public Map<String, Object> value() {
Map<String, Object> map = new HashMap<>(childImplementations.size());
for (Map.Entry<String, ReferenceImplementation> e : childImplementations.entrySet()) {
ReferenceImplementation referenceImplementation = e.getValue();
if (referenceImplementation instanceof RowCollectExpression) {
//noinspection unchecked
((RowCollectExpression) referenceImplementation).setNextRow(this.row);
}
Object value = referenceImplementation.value();
// convert nested columns of type e.getValue().value() to String here
// as we do not want to convert them when building the response
if (value instanceof BytesRef) {
value = ((BytesRef) value).utf8ToString();
}
map.put(e.getKey(), value);
}
return Collections.unmodifiableMap(map);
}
}