/*
* 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.pig.parser;
import org.apache.pig.ComparisonFunc;
import org.apache.pig.EvalFunc;
import org.apache.pig.LoadFunc;
import org.apache.pig.PigToStream;
import org.apache.pig.StoreFuncInterface;
import org.apache.pig.StreamToPig;
class FunctionType {
public static final byte UNKNOWNFUNC = 0;
public static final byte EVALFUNC = 2;
public static final byte COMPARISONFUNC = 4;
public static final byte LOADFUNC = 8;
public static final byte STOREFUNC = 16;
public static final byte PIGTOSTREAMFUNC = 32;
public static final byte STREAMTOPIGFUNC = 64;
public static void tryCasting(Object func, byte funcType) throws Exception {
switch(funcType) {
case FunctionType.EVALFUNC:
EvalFunc evalFunc = (EvalFunc) func;
break;
case FunctionType.COMPARISONFUNC:
ComparisonFunc comparisonFunc = (ComparisonFunc) func;
break;
case FunctionType.LOADFUNC:
LoadFunc loadFunc = (LoadFunc) func;
break;
case FunctionType.STOREFUNC:
StoreFuncInterface storeFunc = (StoreFuncInterface) func;
break;
case FunctionType.PIGTOSTREAMFUNC:
PigToStream ptsFunc = (PigToStream) func;
break;
case FunctionType.STREAMTOPIGFUNC:
StreamToPig stpFunc = (StreamToPig) func;
break;
default:
throw new Exception("Received an unknown function type: " + funcType);
}
}
};