/*
* Licensed to 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.data;
public class CompositeColumns implements Columns {
private final int numColumns;
private final BatchIterator[] iterators;
private ProxyInput[] inputs;
public CompositeColumns(BatchIterator[] iterators) {
this.iterators = iterators;
numColumns = iterators[0].rowData().size();
inputs = new ProxyInput[numColumns];
for (int i = 0; i < inputs.length; i++) {
inputs[i] = new ProxyInput();
}
updateInputs(0);
}
void updateInputs(int idx) {
if (idx >= iterators.length) {
return;
}
Columns columns = iterators[idx].rowData();
for (int i = 0; i < numColumns; i++) {
inputs[i].input = columns.get(i);
}
}
@Override
public Input<?> get(int index) {
return inputs[index];
}
@Override
public int size() {
return numColumns;
}
}