/*
* Licensed 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 com.facebook.presto.accumulo;
import com.facebook.presto.spi.type.StandardTypes;
import com.facebook.presto.spi.type.Type;
/**
* Utility class for Presto Type-related functionality.
*/
public final class Types
{
private Types() {}
public static boolean isArrayType(Type type)
{
return type.getTypeSignature().getBase().equals(StandardTypes.ARRAY);
}
public static boolean isMapType(Type type)
{
return type.getTypeSignature().getBase().equals(StandardTypes.MAP);
}
/**
* Gets the element type of the given array type. Does not validate that the given type is an array.
*
* @param type An array type
* @return Element type of the array
* @throws IndexOutOfBoundsException If type is not an array
* @see Types#isArrayType
*/
public static Type getElementType(Type type)
{
return type.getTypeParameters().get(0);
}
/**
* Gets the key type of the given map type. Does not validate that the given type is a map.
*
* @param type A map type
* @return Key type of the map
* @throws IndexOutOfBoundsException If type is not a map
* @see Types#isMapType
*/
public static Type getKeyType(Type type)
{
return type.getTypeParameters().get(0);
}
/**
* Gets the value type of the given map type. Does not validate that the given type is a map.
*
* @param type A map type
* @return Value type of the map
* @throws IndexOutOfBoundsException If type is not a map
* @see Types#isMapType
*/
public static Type getValueType(Type type)
{
return type.getTypeParameters().get(1);
}
}