| package edu.uci.ics.asterix.runtime.evaluators.functions; |
| |
| import java.io.DataOutput; |
| import java.util.Arrays; |
| |
| import edu.uci.ics.asterix.formats.nontagged.AqlSerializerDeserializerProvider; |
| import edu.uci.ics.asterix.om.base.ABoolean; |
| import edu.uci.ics.asterix.om.base.AString; |
| import edu.uci.ics.asterix.om.types.ATypeTag; |
| import edu.uci.ics.asterix.om.types.BuiltinType; |
| import edu.uci.ics.asterix.om.types.EnumDeserializer; |
| import edu.uci.ics.hyracks.algebricks.common.exceptions.AlgebricksException; |
| import edu.uci.ics.hyracks.algebricks.core.algebra.functions.FunctionIdentifier; |
| import edu.uci.ics.hyracks.algebricks.runtime.base.ICopyEvaluator; |
| import edu.uci.ics.hyracks.algebricks.runtime.base.ICopyEvaluatorFactory; |
| import edu.uci.ics.hyracks.api.dataflow.value.ISerializerDeserializer; |
| import edu.uci.ics.hyracks.api.exceptions.HyracksDataException; |
| import edu.uci.ics.hyracks.data.std.util.ArrayBackedValueStorage; |
| import edu.uci.ics.hyracks.dataflow.common.data.accessors.IFrameTupleReference; |
| |
| public abstract class AbstractBinaryStringBoolEval implements ICopyEvaluator { |
| |
| private DataOutput dout; |
| |
| // allowed input types |
| private final static byte SER_NULL_TYPE_TAG = ATypeTag.NULL.serialize(); |
| private final static byte SER_STRING_TYPE_TAG = ATypeTag.STRING.serialize(); |
| |
| private ArrayBackedValueStorage array0 = new ArrayBackedValueStorage(); |
| private ArrayBackedValueStorage array1 = new ArrayBackedValueStorage(); |
| private ICopyEvaluator evalLeft; |
| private ICopyEvaluator evalRight; |
| private final FunctionIdentifier funcID; |
| @SuppressWarnings({ "rawtypes" }) |
| private ISerializerDeserializer boolSerde = AqlSerializerDeserializerProvider.INSTANCE |
| .getSerializerDeserializer(BuiltinType.ABOOLEAN); |
| |
| public AbstractBinaryStringBoolEval(DataOutput dout, ICopyEvaluatorFactory evalLeftFactory, |
| ICopyEvaluatorFactory evalRightFactory, FunctionIdentifier funcID) throws AlgebricksException { |
| this.dout = dout; |
| this.evalLeft = evalLeftFactory.createEvaluator(array0); |
| this.evalRight = evalRightFactory.createEvaluator(array1); |
| this.funcID = funcID; |
| } |
| |
| @SuppressWarnings("unchecked") |
| @Override |
| public void evaluate(IFrameTupleReference tuple) throws AlgebricksException { |
| array0.reset(); |
| evalLeft.evaluate(tuple); |
| array1.reset(); |
| evalRight.evaluate(tuple); |
| |
| try { |
| if (array0.getByteArray()[0] == SER_NULL_TYPE_TAG && array1.getByteArray()[0] == SER_NULL_TYPE_TAG) { |
| boolSerde.serialize(ABoolean.TRUE, dout); |
| return; |
| } else if ((array0.getByteArray()[0] == SER_NULL_TYPE_TAG && array1.getByteArray()[0] == SER_STRING_TYPE_TAG) |
| || (array0.getByteArray()[0] == SER_STRING_TYPE_TAG && array1.getByteArray()[0] == SER_NULL_TYPE_TAG)) { |
| boolSerde.serialize(ABoolean.FALSE, dout); |
| return; |
| } else if (array0.getByteArray()[0] != SER_STRING_TYPE_TAG |
| || array1.getByteArray()[0] != SER_STRING_TYPE_TAG) { |
| throw new AlgebricksException(funcID.getName() + ": expects input type STRING or NULL, but got " |
| + EnumDeserializer.ATYPETAGDESERIALIZER.deserialize(array0.getByteArray()[0]) + " and " |
| + EnumDeserializer.ATYPETAGDESERIALIZER.deserialize(array1.getByteArray()[0]) + ")!"); |
| } |
| } catch (HyracksDataException e) { |
| throw new AlgebricksException(e); |
| } |
| |
| byte[] b1 = array0.getByteArray(); |
| byte[] b2 = array1.getByteArray(); |
| |
| int lLen = array0.getLength(); |
| int rLen = array1.getLength(); |
| |
| int lStart = array0.getStartOffset(); |
| int rStart = array1.getStartOffset(); |
| ABoolean res = compute(b1, lLen, lStart, b2, rLen, rStart, array0, array1) ? ABoolean.TRUE : ABoolean.FALSE; |
| try { |
| boolSerde.serialize(res, dout); |
| } catch (HyracksDataException e) { |
| throw new AlgebricksException(e); |
| } |
| } |
| |
| protected abstract boolean compute(byte[] lBytes, int lLen, int lStart, byte[] rBytes, int rLen, int rStart, |
| ArrayBackedValueStorage array0, ArrayBackedValueStorage array1) throws AlgebricksException; |
| |
| protected String toRegex(AString pattern) { |
| StringBuilder sb = new StringBuilder(); |
| String str = pattern.getStringValue(); |
| for (int i = 0; i < str.length(); i++) { |
| char c = str.charAt(i); |
| if (c == '\\' && (i < str.length() - 1) && (str.charAt(i + 1) == '_' || str.charAt(i + 1) == '%')) { |
| sb.append(str.charAt(i + 1)); |
| ++i; |
| } else if (c == '%') { |
| sb.append(".*"); |
| } else if (c == '_') { |
| sb.append("."); |
| } else { |
| if (Arrays.binarySearch(reservedRegexChars, c) >= 0) { |
| sb.append('\\'); |
| } |
| sb.append(c); |
| } |
| } |
| return sb.toString(); |
| } |
| |
| private final static char[] reservedRegexChars = new char[] { '\\', '(', ')', '[', ']', '{', '}', '.', '^', '$', |
| '*', '|' }; |
| static { |
| Arrays.sort(reservedRegexChars); |
| } |
| } |