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OPENJPA-495 Populate Ordering/ProjectClauses from JPQL parser to be used for merging multiple ordered results 

git-svn-id: https://svn.apache.org/repos/asf/openjpa/trunk@612583 13f79535-47bb-0310-9956-ffa450edef68
This commit is contained in:
Pinaki Poddar 2008-01-16 22:01:42 +00:00
parent 8464ea75f1
commit 240d356314
2 changed files with 6 additions and 1 deletions
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2
openjpa-kernel/src/main/java/org/apache/openjpa/kernel/ExpressionStoreQuery.java
View File

@ -722,6 +722,8 @@ public class ExpressionStoreQuery
_inMemOrdering = _parser.eval(_exps[0].orderingClauses,
(ExpressionStoreQuery) q, factory, _meta);
}
if (_inMemOrdering == null)
_inMemOrdering = _exps[0].ordering;
}
// use the parsed ordering expression to extract the ordering value

5
openjpa-kernel/src/main/java/org/apache/openjpa/kernel/jpql/JPQLExpressionBuilder.java
View File

@ -319,6 +319,7 @@ public class JPQLExpressionBuilder
JPQLNode node = onlyChild(parent);
Value proj = getValue(node);
exps.projections[i] = proj;
exps.projectionClauses[i] = assemble(node);
exps.projectionAliases[i] = nextAlias();
}
return exp;
@ -370,10 +371,12 @@ public class JPQLExpressionBuilder
if (orderby != null) {
int ordercount = orderby.getChildCount();
exps.ordering = new Value[ordercount];
exps.orderingClauses = new String[ordercount];
exps.ascending = new boolean[ordercount];
for (int i = 0; i < ordercount; i++) {
JPQLNode node = orderby.getChild(i);
exps.ordering[i] = getValue(firstChild(node));
exps.orderingClauses[i] = assemble(firstChild(node));
// ommission of ASC/DESC token implies ascending
exps.ascending[i] = node.getChildCount() <= 1 ||
lastChild(node).id == JJTASCENDING ? true : false;
@ -1374,7 +1377,7 @@ public class JPQLExpressionBuilder
private Value getValue(JPQLNode node, int handleVar) {
Value val = (Value) eval(node);
// determind how to evauate a variabe
// determined how to evaluate a variable
if (!val.isVariable())
return val;
else if (handleVar == VAR_PATH && !(val instanceof Path))