| /* |
| * 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 java.io.DataOutput; |
| |
| import org.apache.asterix.om.base.AMutableInt32; |
| import org.apache.asterix.om.exceptions.ExceptionUtil; |
| import org.apache.asterix.om.types.ATypeTag; |
| import org.apache.asterix.runtime.evaluators.common.ArgumentUtils; |
| import org.apache.hyracks.algebricks.core.algebra.functions.FunctionIdentifier; |
| import org.apache.hyracks.algebricks.runtime.base.IEvaluatorContext; |
| import org.apache.hyracks.algebricks.runtime.base.IScalarEvaluator; |
| import org.apache.hyracks.algebricks.runtime.base.IScalarEvaluatorFactory; |
| import org.apache.hyracks.api.exceptions.HyracksDataException; |
| import org.apache.hyracks.api.exceptions.SourceLocation; |
| import org.apache.hyracks.data.std.api.IPointable; |
| import org.apache.hyracks.data.std.primitive.UTF8StringPointable; |
| import org.apache.hyracks.data.std.primitive.VoidPointable; |
| import org.apache.hyracks.data.std.util.ArrayBackedValueStorage; |
| import org.apache.hyracks.dataflow.common.data.accessors.IFrameTupleReference; |
| |
| public abstract class AbstractStringStringStringIntEval implements IScalarEvaluator { |
| |
| private final IEvaluatorContext ctx; |
| // Argument evaluators. |
| private final IScalarEvaluator eval0; |
| private final IScalarEvaluator eval1; |
| private final IScalarEvaluator eval2; |
| private final IScalarEvaluator eval3; |
| |
| // Argument pointables. |
| final IPointable argPtrFirst = new VoidPointable(); |
| final IPointable argPtrSecond = new VoidPointable(); |
| final IPointable argPtrThird = new VoidPointable(); |
| final IPointable argPtrFourth = new VoidPointable(); |
| private final UTF8StringPointable strPtr1st = new UTF8StringPointable(); |
| private final UTF8StringPointable strPtr2nd = new UTF8StringPointable(); |
| private final UTF8StringPointable strPtr3rd = new UTF8StringPointable(); |
| private final AMutableInt32 mutableInt = new AMutableInt32(0); |
| |
| // For outputting results. |
| ArrayBackedValueStorage resultStorage = new ArrayBackedValueStorage(); |
| DataOutput dout = resultStorage.getDataOutput(); |
| |
| // Function ID, for error reporting. |
| protected final FunctionIdentifier funcID; |
| protected final SourceLocation sourceLoc; |
| |
| AbstractStringStringStringIntEval(IEvaluatorContext context, IScalarEvaluatorFactory eval0, |
| IScalarEvaluatorFactory eval1, IScalarEvaluatorFactory eval2, IScalarEvaluatorFactory eval3, |
| FunctionIdentifier funcID, SourceLocation sourceLoc) throws HyracksDataException { |
| this.ctx = context; |
| this.sourceLoc = sourceLoc; |
| this.eval0 = eval0.createScalarEvaluator(context); |
| this.eval1 = eval1.createScalarEvaluator(context); |
| this.eval2 = eval2.createScalarEvaluator(context); |
| this.eval3 = eval3.createScalarEvaluator(context); |
| this.funcID = funcID; |
| } |
| |
| @SuppressWarnings("unchecked") |
| @Override |
| public void evaluate(IFrameTupleReference tuple, IPointable result) throws HyracksDataException { |
| // Gets the arguments |
| eval0.evaluate(tuple, argPtrFirst); |
| eval1.evaluate(tuple, argPtrSecond); |
| eval2.evaluate(tuple, argPtrThird); |
| eval3.evaluate(tuple, argPtrFourth); |
| |
| if (PointableHelper.checkAndSetMissingOrNull(result, argPtrFirst, argPtrSecond, argPtrThird, argPtrFourth)) { |
| return; |
| } |
| |
| byte[] bytes0 = argPtrFirst.getByteArray(); |
| int start0 = argPtrFirst.getStartOffset(); |
| int len0 = argPtrFirst.getLength(); |
| |
| byte[] bytes1 = argPtrSecond.getByteArray(); |
| int start1 = argPtrSecond.getStartOffset(); |
| int len1 = argPtrSecond.getLength(); |
| |
| byte[] bytes2 = argPtrThird.getByteArray(); |
| int start2 = argPtrThird.getStartOffset(); |
| int len2 = argPtrThird.getLength(); |
| |
| byte[] bytes3 = argPtrFourth.getByteArray(); |
| int start3 = argPtrFourth.getStartOffset(); |
| |
| // Type check. |
| if (!checkStringsAndWarn(bytes0[start0], bytes1[start1], bytes2[start2])) { |
| PointableHelper.setNull(result); |
| return; |
| } |
| // check that the int argument is numeric without fractions (in case arg is double or float) |
| if (!ArgumentUtils.checkWarnOrSetInteger(ctx, sourceLoc, funcID, 3, bytes3, start3, mutableInt)) { |
| PointableHelper.setNull(result); |
| return; |
| } |
| int int4th = mutableInt.getIntegerValue(); |
| // Sets argument UTF8Pointables. |
| strPtr1st.set(bytes0, start0 + 1, len0 - 1); |
| strPtr2nd.set(bytes1, start1 + 1, len1 - 1); |
| strPtr3rd.set(bytes2, start2 + 1, len2 - 1); |
| |
| // Resets the output storage. |
| resultStorage.reset(); |
| // The actual processing. |
| process(strPtr1st, strPtr2nd, strPtr3rd, int4th, result); |
| } |
| |
| /** |
| * The actual processing of a string function. |
| * |
| * @param first |
| * , the first argument. |
| * @param second |
| * , the second argument. |
| * @param third |
| * , the third argument. |
| * @param fourth |
| * , the fourth argument. |
| * @param resultPointable |
| * , the result. |
| * @throws HyracksDataException |
| */ |
| protected abstract void process(UTF8StringPointable first, UTF8StringPointable second, UTF8StringPointable third, |
| int fourth, IPointable resultPointable) throws HyracksDataException; |
| |
| /** Checks the arguments expected to be strings returning {@code false} if they are not and issuing a warning */ |
| private boolean checkStringsAndWarn(byte actualType0, byte actualType1, byte actualType2) { |
| return checkAndWarn(0, actualType0) && checkAndWarn(1, actualType1) && checkAndWarn(2, actualType2); |
| } |
| |
| private boolean checkAndWarn(int argIdx, byte actualType) { |
| if (actualType != ATypeTag.SERIALIZED_STRING_TYPE_TAG) { |
| ExceptionUtil.warnTypeMismatch(ctx, sourceLoc, funcID, actualType, argIdx, ATypeTag.STRING); |
| return false; |
| } |
| return true; |
| } |
| } |