/*
* *************************************************************************************
* Copyright (C) 2008 EsperTech, Inc. All rights reserved. *
* http://esper.codehaus.org *
* http://www.espertech.com *
* ---------------------------------------------------------------------------------- *
* The software in this package is published under the terms of the GPL license *
* a copy of which has been included with this distribution in the license.txt file. *
* *************************************************************************************
*/
package com.espertech.esper.epl.join.exec.sorted;
import com.espertech.esper.epl.expression.ExprEvaluator;
import com.espertech.esper.epl.join.plan.QueryGraphRangeEnum;
import com.espertech.esper.epl.join.plan.QueryGraphValueEntryRange;
import com.espertech.esper.epl.join.plan.QueryGraphValueEntryRangeIn;
import com.espertech.esper.epl.join.plan.QueryGraphValueEntryRangeRelOp;
import com.espertech.esper.epl.lookup.SubordPropRangeKey;
public class SortedAccessStrategyFactory {
public static SortedAccessStrategy make(boolean isNWOnTrigger, int lookupStream, int numStreams, QueryGraphValueEntryRange rangeKeyPair, Class coercionType)
{
return make(isNWOnTrigger, lookupStream, numStreams, new SubordPropRangeKey(rangeKeyPair, coercionType));
}
public static SortedAccessStrategy make(boolean isNWOnTrigger, int lookupStream, int numStreams, SubordPropRangeKey streamRangeKey) {
QueryGraphValueEntryRange rangeKeyPair = streamRangeKey.getRangeInfo();
if (rangeKeyPair.getType().isRange()) {
QueryGraphValueEntryRangeIn in = (QueryGraphValueEntryRangeIn) rangeKeyPair;
ExprEvaluator startExpr = in.getExprStart().getExprEvaluator();
ExprEvaluator endExpr = in.getExprEnd().getExprEvaluator();
boolean includeStart = rangeKeyPair.getType().isIncludeStart();
boolean includeEnd = rangeKeyPair.getType().isIncludeEnd();
if (!rangeKeyPair.getType().isRangeInverted()) {
return new SortedAccessStrategyRange(isNWOnTrigger, lookupStream, numStreams, startExpr, includeStart, endExpr, includeEnd, in.isAllowRangeReversal());
}
else {
return new SortedAccessStrategyRangeInverted(isNWOnTrigger, lookupStream, numStreams, startExpr, includeStart, endExpr, includeEnd);
}
}
else {
QueryGraphValueEntryRangeRelOp relOp = (QueryGraphValueEntryRangeRelOp) rangeKeyPair;
ExprEvaluator keyExpr = relOp.getExpression().getExprEvaluator();
if (rangeKeyPair.getType() == QueryGraphRangeEnum.GREATER_OR_EQUAL) {
return new SortedAccessStrategyGE(isNWOnTrigger, lookupStream, numStreams, keyExpr);
}
else if (rangeKeyPair.getType() == QueryGraphRangeEnum.GREATER) {
return new SortedAccessStrategyGT(isNWOnTrigger, lookupStream, numStreams, keyExpr);
}
else if (rangeKeyPair.getType() == QueryGraphRangeEnum.LESS_OR_EQUAL) {
return new SortedAccessStrategyLE(isNWOnTrigger, lookupStream, numStreams, keyExpr);
}
else if (rangeKeyPair.getType() == QueryGraphRangeEnum.LESS) {
return new SortedAccessStrategyLT(isNWOnTrigger, lookupStream, numStreams, keyExpr);
}
else {
throw new IllegalArgumentException("Comparison operator " + rangeKeyPair.getType() + " not supported");
}
}
}
}