phoenix-core/src/main/java/org/apache/phoenix/parse/IndexKeyConstraint.java

/*
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF 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 org.apache.phoenix.parse;

import java.util.Collections;
import java.util.List;

import org.apache.hadoop.hbase.util.Pair;

import com.google.common.collect.ImmutableList;

import org.apache.phoenix.schema.SortOrder;

public class IndexKeyConstraint {
	public static final IndexKeyConstraint EMPTY = new IndexKeyConstraint(Collections.<Pair<ParseNode, SortOrder>>emptyList());

    private final List<Pair<ParseNode, SortOrder>> columnNameToSortOrder;
    
    IndexKeyConstraint(List<Pair<ParseNode, SortOrder>> parseNodeAndSortOrder) {
        this.columnNameToSortOrder = ImmutableList.copyOf(parseNodeAndSortOrder);
    }

    public List<Pair<ParseNode, SortOrder>> getParseNodeAndSortOrderList() {
        return columnNameToSortOrder;
    }
}