Package org.datanucleus.query.expression

Examples of org.datanucleus.query.expression.Expression

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     */
    private boolean satisfiesHavingClause(List set)
    {
        state.put(RESULTS_SET, set);

        Expression having = compilation.getExprHaving();
        if (having.evaluate(evaluator) == Boolean.TRUE)
        {
            return true;
        }
        return false;
    }
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            // Static function
            if (method.toLowerCase().equals("count"))
            {
                Collection coll = (Collection)state.get(JavaQueryEvaluator.RESULTS_SET);
                SetExpression setexpr = new SetExpression(coll, candidateAlias);
                Expression paramExpr = invokeExpr.getArguments().get(0);
                if (paramExpr.getOperator() == Expression.OP_DISTINCT)
                {
                    Collection processable = new HashSet(coll); // No dups in HashSet
                    coll = processable;
                }
                return setexpr.count(paramExpr, this);
            }
            else if (method.toLowerCase().equals("sum"))
            {
                Collection coll = (Collection)state.get(JavaQueryEvaluator.RESULTS_SET);
                SetExpression setexpr = new SetExpression(coll, candidateAlias);
                Expression paramExpr = invokeExpr.getArguments().get(0);
                if (paramExpr.getOperator() == Expression.OP_DISTINCT)
                {
                    Collection processable = new HashSet(coll); // No dups in HashSet
                    coll = processable;
                }
                return setexpr.sum(paramExpr, this, state);
            }
            else if (method.toLowerCase().equals("avg"))
            {
                Collection coll = (Collection)state.get(JavaQueryEvaluator.RESULTS_SET);
                SetExpression setexpr = new SetExpression(coll, candidateAlias);
                Expression paramExpr = invokeExpr.getArguments().get(0);
                if (paramExpr.getOperator() == Expression.OP_DISTINCT)
                {
                    Collection processable = new HashSet(coll); // No dups in HashSet
                    coll = processable;
                }
                return setexpr.avg(paramExpr, this, state);
            }
            else if (method.toLowerCase().equals("min"))
            {
                Collection coll = (Collection)state.get(JavaQueryEvaluator.RESULTS_SET);
                SetExpression setexpr = new SetExpression(coll, candidateAlias);
                Expression paramExpr = invokeExpr.getArguments().get(0);
                if (paramExpr.getOperator() == Expression.OP_DISTINCT)
                {
                    Collection processable = new HashSet(coll); // No dups in HashSet
                    coll = processable;
                }
                return setexpr.min(paramExpr, this, state);
            }
            else if (method.toLowerCase().equals("max"))
            {
                Collection coll = (Collection)state.get(JavaQueryEvaluator.RESULTS_SET);
                SetExpression setexpr = new SetExpression(coll, candidateAlias);
                Expression paramExpr = invokeExpr.getArguments().get(0);
                if (paramExpr.getOperator() == Expression.OP_DISTINCT)
                {
                    Collection processable = new HashSet(coll); // No dups in HashSet
                    coll = processable;
                }
                return setexpr.max(paramExpr, this, state);
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            if (primExpr.getLeft() instanceof DyadicExpression)
            {
                DyadicExpression dyExpr = (DyadicExpression)primExpr.getLeft();
                if (dyExpr.getOperator() == Expression.OP_CAST)
                {
                    Expression castLeftExpr = dyExpr.getLeft();
                    if (castLeftExpr instanceof PrimaryExpression)
                    {
                        value = getValueForPrimaryExpression((PrimaryExpression)castLeftExpr);
                        String castClassName = (String)((Literal)dyExpr.getRight()).getLiteral();
                        if (value != null)
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            }
        }

        Expression[] exprFrom = compileFrom();
        compileCandidatesParametersVariables(parameters);
        Expression exprFilter = compileFilter();
        Expression[] exprOrdering = compileOrdering();
        Expression[] exprResult = compileResult();
        Expression[] exprGrouping = compileGrouping();
        Expression exprHaving = compileHaving();
        Expression[] exprUpdate = compileUpdate();

        if (exprResult != null && exprResult.length == 1 && exprResult[0] instanceof PrimaryExpression)
        {
            // Check for special case of "Object(p)" in result, which means no special result
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            }
        }

        Expression[] exprFrom = compileFrom();
        compileCandidatesParametersVariables(parameters);
        Expression exprFilter = compileFilter();
        Expression[] exprOrdering = compileOrdering();
        Expression[] exprResult = compileResult();
        Expression[] exprGrouping = compileGrouping();
        Expression exprHaving = compileHaving();
        Expression[] exprUpdate = compileUpdate();

        // Impose checks from JDO spec
        if (exprGrouping != null)
        {
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        {
            return true;
        }
        else if (expr instanceof DyadicExpression)
        {
            Expression left = expr.getLeft();
            Expression right = expr.getRight();
            if (!containsOnlyGroupingOrAggregates(left, exprGrouping))
            {
                return false;
            }
            if (!containsOnlyGroupingOrAggregates(right, exprGrouping))
            {
                return false;
            }
            return true;
        }
        else if (expr instanceof InvokeExpression)
        {
            InvokeExpression invExpr = (InvokeExpression)expr;
            if (isExpressionGroupingOrAggregate(invExpr, exprGrouping))
            {
                return true;
            }
            Expression invokedExpr = invExpr.getLeft();
            if (invokedExpr != null && !containsOnlyGroupingOrAggregates(invokedExpr, exprGrouping))
            {
                // Check invoked object
                return false;
            }
            List<Expression> invArgs = invExpr.getArguments();
            if (invArgs != null)
            {
                // Check invocation arguments
                Iterator<Expression> iter= invArgs.iterator();
                while (iter.hasNext())
                {
                    Expression argExpr = iter.next();
                    if (!containsOnlyGroupingOrAggregates(argExpr, exprGrouping))
                    {
                        return false;
                    }
                }
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                }
            }
        }
        else if (expr instanceof OrderExpression)
        {
            Expression orderExpr = ((OrderExpression)expr).getLeft();
            return isExpressionGroupingOrAggregate(orderExpr, exprGrouping);
        }
        else if (expr instanceof Literal)
        {
            return true;
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            }

            ExpressionCompiler comp = new ExpressionCompiler();
            comp.setSymbolTable(symtbl);
            comp.setMethodAliases(queryMethodAliasByPrefix);
            Expression expr = comp.compileExpression(node);
            expr.bind(symtbl);
            return expr;
        }
        return null;
    }
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        }

        ExpressionCompiler comp = new ExpressionCompiler();
        comp.setSymbolTable(symtbl);
        comp.setMethodAliases(queryMethodAliasByPrefix);
        Expression expr = comp.compileExpression(node);
        expr.bind(symtbl);
        return expr;
    }
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    public static String getJDOQLForExpression(Expression expr)
    {
        if (expr instanceof DyadicExpression)
        {
            DyadicExpression dyExpr = (DyadicExpression)expr;
            Expression left = dyExpr.getLeft();
            Expression right = dyExpr.getRight();
            StringBuffer str = new StringBuffer("(");
            if (left != null)
            {
                str.append(JDOQLQueryHelper.getJDOQLForExpression(left));
            }
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Related Classes of org.datanucleus.query.expression.Expression

  • com.google.appengine.datanucleus.query.DatastoreQuery
  • org.datanucleus.api.jpa.criteria.FromImpl
  • org.datanucleus.query.compiler.JavaQueryCompiler
  • org.datanucleus.query.compiler.JDOQLCompiler
  • org.datanucleus.query.compiler.JPQLCompiler
  • org.datanucleus.query.compiler.SQLCompiler
  • org.datanucleus.query.evaluator.JavaQueryEvaluator
  • org.datanucleus.query.evaluator.memory.InMemoryExpressionEvaluator
  • org.datanucleus.query.JDOQLQueryHelper
  • org.datanucleus.store.appengine.query.DatastoreQuery
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