cosmos.sql.impl.functions.IndexTransform.java Source code

Introduction

Here is the source code for cosmos.sql.impl.functions.IndexTransform.java

Source

/**
 * 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.
 *
 *  Copyright 2013 
 *
 */
package cosmos.sql.impl.functions;

import java.util.Map.Entry;

import net.hydromatic.optiq.impl.java.JavaTypeFactory;

import org.eigenbase.reltype.RelDataType;
import org.eigenbase.sql.type.SqlTypeName;

import com.google.common.base.Function;
import com.google.common.collect.Maps;

import cosmos.options.Index;

/**
 * Transforms indexes into an immutable entry describing the indexed entry
 * 
 * 
 */
public class IndexTransform implements Function<Index, Entry<String, RelDataType>> {

    protected JavaTypeFactory javaFactory;

    public IndexTransform(JavaTypeFactory javaFactory) {
        this.javaFactory = javaFactory;
    }

    @Override
    public Entry<String, RelDataType> apply(Index input) {

        return Maps.immutableEntry(input.column().toString(), javaFactory.createSqlType(SqlTypeName.VARCHAR));
    }

}