Java tutorial
/* * 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.asterix.runtime.evaluators.functions; import org.apache.asterix.om.functions.AsterixBuiltinFunctions; import org.apache.asterix.om.functions.IFunctionDescriptor; import org.apache.asterix.om.functions.IFunctionDescriptorFactory; import org.apache.asterix.om.types.ATypeTag; import org.apache.asterix.runtime.exceptions.UnsupportedTypeException; import org.apache.hyracks.algebricks.core.algebra.functions.FunctionIdentifier; import org.apache.hyracks.api.exceptions.HyracksDataException; import com.google.common.math.LongMath; public class NumericCaretDescriptor extends AbstractNumericArithmeticEval { private static final long serialVersionUID = 1L; public static final IFunctionDescriptorFactory FACTORY = new IFunctionDescriptorFactory() { public IFunctionDescriptor createFunctionDescriptor() { return new NumericCaretDescriptor(); } }; /* (non-Javadoc) * @see org.apache.asterix.runtime.evaluators.functions.AbstractNumericArithmeticEval#evaluateInteger(long, long) */ @Override protected long evaluateInteger(long lhs, long rhs) throws HyracksDataException { if (rhs > Integer.MAX_VALUE) { throw new ArithmeticException("Exponent cannot be larger than 2^31-1"); } return LongMath.checkedPow(lhs, (int) rhs); } /* (non-Javadoc) * @see org.apache.asterix.runtime.evaluators.functions.AbstractNumericArithmeticEval#evaluateDouble(double, double) */ @Override protected double evaluateDouble(double lhs, double rhs) throws HyracksDataException { return Math.pow(lhs, rhs); } /* (non-Javadoc) * @see org.apache.asterix.om.functions.AbstractFunctionDescriptor#getIdentifier() */ @Override public FunctionIdentifier getIdentifier() { return AsterixBuiltinFunctions.CARET; } @Override protected long evaluateTimeDurationArithmetic(long chronon, int yearMonth, long dayTime, boolean isTimeOnly) throws HyracksDataException { throw new UnsupportedTypeException(getIdentifier().getName(), ATypeTag.SERIALIZED_DURATION_TYPE_TAG); } @Override protected long evaluateTimeInstanceArithmetic(long chronon0, long chronon1) throws HyracksDataException { throw new UnsupportedTypeException(getIdentifier().getName(), ATypeTag.SERIALIZED_TIME_TYPE_TAG); } }