cassandra-trunk/src/java/org/apache/cassandra/cql3/functions/NativeScalarFunction.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.cassandra.cql3.functions;

import java.nio.ByteBuffer;
import java.util.List;

import org.apache.cassandra.db.marshal.AbstractType;

/**
 * Base class for the <code>ScalarFunction</code> native classes.
 */
public abstract class NativeScalarFunction extends NativeFunction implements ScalarFunction
{
    protected NativeScalarFunction(String name, AbstractType<?> returnType, AbstractType<?>... argsType)
    {
        super(name, returnType, argsType);
    }

    public boolean isCalledOnNullInput()
    {
        return true;
    }

    public final boolean isAggregate()
    {
        return false;
    }

    /**
     * Checks if a partial application of the function is monotonic.
     *
     * <p>A function is monotonic if it is either entirely nonincreasing or nondecreasing.</p>
     *
     * @param partialParameters the input parameters used to create the partial application of the function
     * @return {@code true} if the partial application of the function is monotonic {@code false} otherwise.
     */
    protected boolean isPartialApplicationMonotonic(List<ByteBuffer> partialParameters)
    {
        return isMonotonic();
    }
}
