/*
 * 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;

import com.google.common.base.Function;
import com.google.common.base.MoreObjects;
import com.google.common.collect.Iterators;

import java.util.Collection;
import java.util.Iterator;

public class CollectionBucket implements Bucket {

    private final Collection<Object[]> rows;
    private final Function<Object[], Row> arrayToRowFunction;

    public CollectionBucket(Collection<Object[]> rows) {
        this.rows = rows;
        arrayToRowFunction = Buckets.arrayToRowFunction();
    }

    public CollectionBucket(Collection<Object[]> rows, int numColumns) {
        this.rows = rows;
        arrayToRowFunction = Buckets.arrayToRowFunction(numColumns);
    }

    @Override
    public int size() {
        return rows.size();
    }

    @Override
    public Iterator<Row> iterator() {
        return Iterators.transform(rows.iterator(), arrayToRowFunction);
    }

    @Override
    public String toString() {
        return MoreObjects.toStringHelper(this)
            .add("numRows", rows.size())
            .toString();
    }
}