| /* |
| * 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 java.io.IOException; |
| |
| import org.apache.asterix.om.exceptions.ExceptionUtil; |
| import org.apache.asterix.om.types.ATypeTag; |
| 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 AbstractBinaryStringEval implements IScalarEvaluator { |
| |
| private final IEvaluatorContext ctx; |
| // Argument evaluators. |
| private final IScalarEvaluator evalLeft; |
| private final IScalarEvaluator evalRight; |
| |
| // Argument pointables. |
| private final IPointable argPtrLeft = new VoidPointable(); |
| private final IPointable argPtrSecond = new VoidPointable(); |
| private final UTF8StringPointable leftStringPointable = new UTF8StringPointable(); |
| private final UTF8StringPointable rightStringPointable = new UTF8StringPointable(); |
| |
| // For results. |
| protected final ArrayBackedValueStorage resultStorage = new ArrayBackedValueStorage(); |
| protected final DataOutput dataOutput = resultStorage.getDataOutput(); |
| |
| // Function ID, for error reporting. |
| private final FunctionIdentifier funcID; |
| protected final SourceLocation sourceLoc; |
| |
| public AbstractBinaryStringEval(IEvaluatorContext context, IScalarEvaluatorFactory evalLeftFactory, |
| IScalarEvaluatorFactory evalRightFactory, FunctionIdentifier funcID, SourceLocation sourceLoc) |
| throws HyracksDataException { |
| this.sourceLoc = sourceLoc; |
| this.evalLeft = evalLeftFactory.createScalarEvaluator(context); |
| this.evalRight = evalRightFactory.createScalarEvaluator(context); |
| this.funcID = funcID; |
| this.ctx = context; |
| } |
| |
| @SuppressWarnings("unchecked") |
| @Override |
| public void evaluate(IFrameTupleReference tuple, IPointable resultPointable) throws HyracksDataException { |
| resultStorage.reset(); |
| |
| // Gets the arguments |
| evalLeft.evaluate(tuple, argPtrLeft); |
| evalRight.evaluate(tuple, argPtrSecond); |
| |
| if (PointableHelper.checkAndSetMissingOrNull(resultPointable, argPtrLeft, argPtrSecond)) { |
| return; |
| } |
| |
| byte[] bytes0 = argPtrLeft.getByteArray(); |
| int offset0 = argPtrLeft.getStartOffset(); |
| int len0 = argPtrLeft.getLength(); |
| byte[] bytes1 = argPtrSecond.getByteArray(); |
| int offset1 = argPtrSecond.getStartOffset(); |
| int len1 = argPtrSecond.getLength(); |
| |
| // Type check. |
| if (bytes0[offset0] != ATypeTag.SERIALIZED_STRING_TYPE_TAG) { |
| PointableHelper.setNull(resultPointable); |
| ExceptionUtil.warnTypeMismatch(ctx, sourceLoc, funcID, bytes0[offset0], 0, ATypeTag.STRING); |
| return; |
| } |
| if (bytes1[offset1] != ATypeTag.SERIALIZED_STRING_TYPE_TAG) { |
| PointableHelper.setNull(resultPointable); |
| ExceptionUtil.warnTypeMismatch(ctx, sourceLoc, funcID, bytes1[offset1], 1, ATypeTag.STRING); |
| return; |
| } |
| |
| // Sets StringUTF8Pointables. |
| leftStringPointable.set(bytes0, offset0 + 1, len0 - 1); |
| rightStringPointable.set(bytes1, offset1 + 1, len1 - 1); |
| |
| // The actual processing. |
| try { |
| process(leftStringPointable, rightStringPointable, resultPointable); |
| } catch (IOException e) { |
| throw HyracksDataException.create(e); |
| } |
| } |
| |
| /** |
| * The actual processing of a string function. |
| * |
| * @param left |
| * , the first argument. |
| * @param right |
| * , the second argument. |
| * @param resultPointable |
| * , the result. |
| * @throws IOException |
| */ |
| protected abstract void process(UTF8StringPointable left, UTF8StringPointable right, IPointable resultPointable) |
| throws IOException; |
| |
| } |