| /* |
| * To change this template, choose Tools | Templates |
| * and open the template in the editor. |
| */ |
| package edu.uci.ics.asterix.runtime.evaluators.functions; |
| |
| import edu.uci.ics.asterix.formats.nontagged.AqlSerializerDeserializerProvider; |
| import edu.uci.ics.asterix.om.base.AMutableString; |
| import edu.uci.ics.asterix.om.base.ANull; |
| 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.hyracks.algebricks.common.exceptions.AlgebricksException; |
| 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.dataflow.common.data.accessors.ArrayBackedValueStorage; |
| import edu.uci.ics.hyracks.dataflow.common.data.accessors.IFrameTupleReference; |
| import java.io.DataOutput; |
| import java.io.IOException; |
| import java.util.Arrays; |
| import java.util.regex.Pattern; |
| |
| /** |
| * @author ilovesoup |
| */ |
| public abstract class AbstractQuadStringStringEval implements ICopyEvaluator { |
| |
| private DataOutput dout; |
| 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 ArrayBackedValueStorage array2 = new ArrayBackedValueStorage(); |
| private ArrayBackedValueStorage array3 = new ArrayBackedValueStorage(); |
| private ICopyEvaluator eval0; |
| private ICopyEvaluator eval1; |
| private ICopyEvaluator eval2; |
| private ICopyEvaluator eval3; |
| |
| private AMutableString resultBuffer = new AMutableString(""); |
| @SuppressWarnings("rawtypes") |
| private ISerializerDeserializer nullSerde = AqlSerializerDeserializerProvider.INSTANCE |
| .getSerializerDeserializer(BuiltinType.ANULL); |
| @SuppressWarnings("rawtypes") |
| private ISerializerDeserializer strSerde = AqlSerializerDeserializerProvider.INSTANCE |
| .getSerializerDeserializer(BuiltinType.ASTRING); |
| |
| public AbstractQuadStringStringEval(DataOutput dout, ICopyEvaluatorFactory eval0, ICopyEvaluatorFactory eval1, |
| ICopyEvaluatorFactory eval2, ICopyEvaluatorFactory eval3) throws AlgebricksException { |
| this.dout = dout; |
| this.eval0 = eval0.createEvaluator(array0); |
| this.eval1 = eval1.createEvaluator(array1); |
| this.eval2 = eval2.createEvaluator(array2); |
| this.eval3 = eval3.createEvaluator(array3); |
| } |
| |
| @SuppressWarnings("unchecked") |
| @Override |
| public void evaluate(IFrameTupleReference tuple) throws AlgebricksException { |
| array0.reset(); |
| eval0.evaluate(tuple); |
| array1.reset(); |
| eval1.evaluate(tuple); |
| array2.reset(); |
| eval2.evaluate(tuple); |
| array3.reset(); |
| eval3.evaluate(tuple); |
| |
| try { |
| if (array0.getByteArray()[0] == SER_NULL_TYPE_TAG) { |
| nullSerde.serialize(ANull.NULL, dout); |
| return; |
| } else if (array0.getByteArray()[0] == SER_STRING_TYPE_TAG) { |
| if (array0.getByteArray()[1] == SER_NULL_TYPE_TAG) { |
| dout.write(array0.getByteArray(), array0.getStartOffset(), array0.getLength()); |
| return; |
| } |
| |
| } else { |
| throw new AlgebricksException("Expects String Type."); |
| } |
| } catch (HyracksDataException e) { |
| throw new AlgebricksException(e); |
| } catch (IOException e) { |
| throw new AlgebricksException(e.getMessage()); |
| } |
| |
| byte[] b0 = array0.getByteArray(); |
| byte[] b1 = array1.getByteArray(); |
| byte[] b2 = array2.getByteArray(); |
| byte[] b3 = array3.getByteArray(); |
| |
| int len0 = array0.getLength(); |
| int len1 = array1.getLength(); |
| int len2 = array2.getLength(); |
| int len3 = array3.getLength(); |
| |
| int s0 = array0.getStartOffset(); |
| int s1 = array1.getStartOffset(); |
| int s2 = array2.getStartOffset(); |
| int s3 = array3.getStartOffset(); |
| |
| String res = compute(b0, len0, s0, b1, len1, s1, b2, len2, s2, b3, len3, s3, array0, array1); |
| resultBuffer.setValue(res); |
| try { |
| strSerde.serialize(resultBuffer, dout); |
| } catch (HyracksDataException e) { |
| throw new AlgebricksException(e); |
| } |
| } |
| |
| protected abstract String compute(byte[] b0, int l0, int s0, byte[] b1, int l1, int s1, byte[] b2, int l2, int s2, |
| byte[] b3, int l3, int s3, 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(); |
| } |
| |
| protected int toFlag(AString pattern) { |
| String str = pattern.getStringValue(); |
| int flag = 0; |
| for (int i = 0; i < str.length(); i++) { |
| char c = str.charAt(i); |
| switch (c) { |
| case 's': |
| flag |= Pattern.DOTALL; |
| break; |
| case 'm': |
| flag |= Pattern.MULTILINE; |
| break; |
| case 'i': |
| flag |= Pattern.CASE_INSENSITIVE; |
| break; |
| case 'x': |
| flag |= Pattern.COMMENTS; |
| break; |
| } |
| } |
| return flag; |
| } |
| |
| private final static char[] reservedRegexChars = new char[] { '\\', '(', ')', '[', ']', '{', '}', '.', '^', '$', |
| '*', '|' }; |
| |
| static { |
| Arrays.sort(reservedRegexChars); |
| } |
| } |