/**
* Licensed to Odiago, Inc. under one or more contributor license
* agreements. See the NOTICE.txt file distributed with this work for
* additional information regarding copyright ownership. Odiago, Inc.
* 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 com.odiago.flumebase.exec.builtins;
import java.math.BigDecimal;
import java.util.Collections;
import java.util.List;
import com.odiago.flumebase.exec.EventWrapper;
import com.odiago.flumebase.lang.EvalException;
import com.odiago.flumebase.lang.ScalarFunc;
import com.odiago.flumebase.lang.Type;
import com.odiago.flumebase.lang.UniversalType;
/**
* Return arg^2.
*/
public class square extends ScalarFunc {
private UniversalType mArgType;
public square() {
mArgType = new UniversalType("'a");
mArgType.addConstraint(Type.getNullable(Type.TypeName.TYPECLASS_NUMERIC));
}
@Override
public Object eval(EventWrapper event, Object... args) throws EvalException {
Number arg0 = (Number) args[0];
if (null == arg0) {
return null;
} else if (arg0 instanceof Integer) {
int i = arg0.intValue();
return Integer.valueOf(i * i);
} else if (arg0 instanceof Long) {
long ln = arg0.longValue();
return Long.valueOf(ln * ln);
} else if (arg0 instanceof Float) {
float f = arg0.floatValue();
return Float.valueOf(f * f);
} else if (arg0 instanceof Double) {
double d = arg0.doubleValue();
return Double.valueOf(d * d);
} else if (arg0 instanceof BigDecimal) {
BigDecimal bd = (BigDecimal) arg0;
return bd.multiply(bd);
} else {
throw new EvalException("Cannot square value of type : " + arg0.getClass().getName());
}
}
@Override
public List<Type> getArgumentTypes() {
return Collections.singletonList((Type) mArgType);
}
@Override
public Type getReturnType() {
// Return type is the same as our argument type.
return mArgType;
}
@Override
public boolean autoPromoteArguments() {
return false;
}
}