use of org.drools.mvel.expr.MVELObjectExpression in project drools by kiegroup.
the class MVELObjectExpressionBuilder method build.
public static MVELObjectExpression build(String expression, RuleBuildContext context) {
boolean typesafe = context.isTypesafe();
// pushing consequence LHS into the stack for variable resolution
context.getDeclarationResolver().pushOnBuildStack(context.getRule().getLhs());
try {
// This builder is re-usable in other dialects, so specify by name
MVELDialect dialect = (MVELDialect) context.getDialect("mvel");
Map<String, Declaration> decls = context.getDeclarationResolver().getDeclarations(context.getRule());
MVELAnalysisResult analysis = (MVELAnalysisResult) dialect.analyzeExpression(context, context.getRuleDescr(), expression, new BoundIdentifiers(DeclarationScopeResolver.getDeclarationClasses(decls), context));
context.setTypesafe(analysis.isTypesafe());
final BoundIdentifiers usedIdentifiers = analysis.getBoundIdentifiers();
int i = usedIdentifiers.getDeclrClasses().keySet().size();
Declaration[] previousDeclarations = new Declaration[i];
i = 0;
for (String id : usedIdentifiers.getDeclrClasses().keySet()) {
previousDeclarations[i++] = decls.get(id);
}
Arrays.sort(previousDeclarations, RuleTerminalNode.SortDeclarations.instance);
MVELCompilationUnit unit = dialect.getMVELCompilationUnit(expression, analysis, previousDeclarations, null, null, context, "drools", KnowledgeHelper.class, false, MVELCompilationUnit.Scope.EXPRESSION);
MVELObjectExpression expr = new MVELObjectExpression(unit, dialect.getId());
MVELDialectRuntimeData data = (MVELDialectRuntimeData) context.getPkg().getDialectRuntimeRegistry().getDialectData("mvel");
data.addCompileable(context.getRule(), expr);
expr.compile(data);
return expr;
} catch (final Exception e) {
AsmUtil.copyErrorLocation(e, context.getRuleDescr());
context.addError(new DescrBuildError(context.getParentDescr(), context.getRuleDescr(), null, "Unable to build expression : " + e.getMessage() + "'" + expression + "'"));
return null;
} finally {
context.setTypesafe(typesafe);
}
}
use of org.drools.mvel.expr.MVELObjectExpression in project drools by kiegroup.
the class MVELConstraintBuilder method buildTimerExpression.
@Override
public TimerExpression buildTimerExpression(String expression, RuleBuildContext context) {
boolean typesafe = context.isTypesafe();
// pushing consequence LHS into the stack for variable resolution
context.getDeclarationResolver().pushOnBuildStack(context.getRule().getLhs());
try {
// This builder is re-usable in other dialects, so specify by name
MVELDialect dialect = (MVELDialect) context.getDialect("mvel");
Map<String, Declaration> decls = context.getDeclarationResolver().getDeclarations(context.getRule());
MVELAnalysisResult analysis = (MVELAnalysisResult) dialect.analyzeExpression(context, context.getRuleDescr(), expression, new BoundIdentifiers(DeclarationScopeResolver.getDeclarationClasses(decls), context));
context.setTypesafe(analysis.isTypesafe());
final BoundIdentifiers usedIdentifiers = analysis.getBoundIdentifiers();
int i = usedIdentifiers.getDeclrClasses().keySet().size();
Declaration[] previousDeclarations = new Declaration[i];
i = 0;
for (String id : usedIdentifiers.getDeclrClasses().keySet()) {
previousDeclarations[i++] = decls.get(id);
}
Arrays.sort(previousDeclarations, RuleTerminalNode.SortDeclarations.instance);
MVELCompilationUnit unit = dialect.getMVELCompilationUnit(expression, analysis, previousDeclarations, null, null, context, "drools", KnowledgeHelper.class, false, MVELCompilationUnit.Scope.EXPRESSION);
MVELObjectExpression expr = new MVELObjectExpression(unit, dialect.getId());
MVELDialectRuntimeData data = (MVELDialectRuntimeData) context.getPkg().getDialectRuntimeRegistry().getDialectData("mvel");
data.addCompileable(context.getRule(), expr);
expr.compile(data);
return expr;
} catch (final Exception e) {
AsmUtil.copyErrorLocation(e, context.getRuleDescr());
context.addError(new DescrBuildError(context.getParentDescr(), context.getRuleDescr(), null, "Unable to build expression : " + e.getMessage() + "'" + expression + "'"));
return null;
} finally {
context.setTypesafe(typesafe);
}
}
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