Examples of com.volantis.xml.expression.Expression.evaluate()

Class com.volantis.xml.expression.Expression

Examples of com.volantis.xml.expression.Expression.evaluate()

com.volantis.xml.expression.Expression.evaluate()
Evaluate the expression. @param context The context within which the expression is evaluated. @return The result of the expression. @throws ExpressionException An exception if the exception resulted in anerror.

        items[2] = factory.createStringValue("c");     
        context.getCurrentScope().declareVariable(
                   new ImmutableExpandedName("", "myVar"),
                   factory.createSequence(items)); 
       Expression exp = compileExpression("$myVar=(\"a\",\"b\",\"c\")");
       Value result = exp.evaluate(context);    
  
       assertTrue("Sequence comparison failed :" + 
           "'(\"a\",\"b\",\"c\")=(\"a\",\"d\")'",
            ((BooleanValue) result).asJavaBoolean());

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       assertTrue("Sequence comparison failed :" + 
           "'(\"a\",\"b\",\"c\")=(\"a\",\"d\")'",
            ((BooleanValue) result).asJavaBoolean());


       Expression exp2 = compileExpression("$myVar=(\"a\",\"d\")");
       Value result2 = exp2.evaluate(context);    


       assertTrue("Sequence comparison failed: " + 
           "'(\"a\",\"b\",\"c\")=(\"a\",\"d\")'",
            ((BooleanValue) result2).asJavaBoolean());

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       assertTrue("Sequence comparison failed: " + 
           "'(\"a\",\"b\",\"c\")=(\"a\",\"d\")'",
            ((BooleanValue) result2).asJavaBoolean());     
       
       Expression exp3 = compileExpression("2=(3, 4 div 2)");
       Value result3 = exp3.evaluate(context);    


       assertTrue("Sequence comparison failed : '2=(3, 4 div 2)'",
            ((BooleanValue) result3).asJavaBoolean());        
    }

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        context.getCurrentScope().declareVariable(
            new ImmutableExpandedName("", "right"),
            factory.createSequence(right));


        Expression exp = compileExpression("$left = (($right))");
        Value result = exp.evaluate(context);      
        assertTrue("Nested variable comparison failed", 
            ((BooleanValue) result).asJavaBoolean());
    }
    
    /**

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                result);


        Expression exp = compileExpression("$p:var");


        assertTrue("Variable expression evaluation failed",
                   exp.evaluate(context) == result);
    }


    /**
     * Ensures that an unqualified variable reference can be evaluated
     * @throws Exception if an error occurs

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                result);


        Expression exp = compileExpression("$myVar");


        assertTrue("Variable expression evaluation failed",
                   exp.evaluate(context) == result);
    }


    /**
     * Ensures that an unqualified variable reference that has not be declared
     * cannot be evaluated

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     * @throws Exception if an error occurs
     */
    public void testUnDeclaredVariableEvaluate() throws Exception {
        Expression exp = compileExpression("$myVar");
        try {
            exp.evaluate(context);


            fail("Expected an expression exception");
        } catch (ExpressionException e) {
            // Expected condition
        }

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                factory.createSequence(items));


        Expression exp = compileExpression("$myVar[1]");


        assertTrue("Variable expression evaluation failed",
                   exp.evaluate(context) == items[0]);
    }


    public void testSequencePredicateMidEvaluate() throws Exception {
        Item[] items = new Item[3];

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                factory.createSequence(items));


        Expression exp = compileExpression("$myVar[2]");


        assertTrue("Variable expression evaluation failed",
                   exp.evaluate(context) == items[1]);
    }


    public void testSequencePredicateLastEvaluate() throws Exception {
        Item[] items = new Item[3];

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                factory.createSequence(items));


        Expression exp = compileExpression("$myVar[3]");


        assertTrue("Variable expression evaluation failed",
                   exp.evaluate(context) == items[2]);
    }


    public void testSequencePredicateOutOfBoundsEvaluate() throws Exception {
        Item[] items = new Item[3];

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