Examples with ExpressionNode org.apache.sling.scripting.sightly.compiler.expression.ExpressionNode used on opensource projects

Example 11 with ExpressionNode

use of org.apache.sling.scripting.sightly.compiler.expression.ExpressionNode in project sling by apache.

the class ElementPlugin method invoke.

@Override
public PluginInvoke invoke(final Expression expression, final PluginCallInfo callInfo, final CompilerContext compilerContext) {
    return new DefaultPluginInvoke() {

        private final ExpressionNode node = adjustContext(compilerContext, expression, MarkupContext.ELEMENT_NAME, ExpressionContext.ELEMENT).getRoot();

        private String tagVar = compilerContext.generateVariable("tagVar");

        @Override
        public void beforeElement(PushStream stream, String tagName) {
            stream.write(new VariableBinding.Start(tagVar, node));
        }

        @Override
        public void beforeTagOpen(PushStream stream) {
            stream.write(new Conditional.Start(tagVar, true));
            stream.write(new OutText("<"));
            stream.write(new OutputVariable(tagVar));
            stream.write(Conditional.END);
            stream.write(new Conditional.Start(tagVar, false));
        }

        @Override
        public void beforeAttributes(PushStream stream) {
            stream.write(Conditional.END);
        }

        @Override
        public void beforeTagClose(PushStream stream, boolean isSelfClosing) {
            if (!isSelfClosing) {
                stream.write(new Conditional.Start(tagVar, true));
                stream.write(new OutText("</"));
                stream.write(new OutputVariable(tagVar));
                stream.write(new OutText(">"));
                stream.write(Conditional.END);
            }
            stream.write(new Conditional.Start(tagVar, false));
        }

        @Override
        public void afterTagClose(PushStream stream, boolean isSelfClosing) {
            stream.write(Conditional.END);
        }

        @Override
        public void afterElement(PushStream stream) {
            stream.write(VariableBinding.END);
        }
    };
}

Example 12 with ExpressionNode

use of org.apache.sling.scripting.sightly.compiler.expression.ExpressionNode in project sling by apache.

the class ListPlugin method invoke.

@Override
public PluginInvoke invoke(final Expression expression, final PluginCallInfo callInfo, final CompilerContext compilerContext) {
    return new DefaultPluginInvoke() {

        private String listVariable = compilerContext.generateVariable("collectionVar");

        private String collectionSizeVar = compilerContext.generateVariable("size");

        @Override
        public void beforeElement(PushStream stream, String tagName) {
            stream.write(new VariableBinding.Start(listVariable, expression.getRoot()));
            stream.write(new VariableBinding.Start(collectionSizeVar, new UnaryOperation(UnaryOperator.LENGTH, new Identifier(listVariable))));
            stream.write(new Conditional.Start(collectionSizeVar, true));
        }

        @Override
        public void beforeChildren(PushStream stream) {
            String itemVariable = decodeItemVariable();
            String loopStatusVar = Syntax.itemLoopStatusVariable(itemVariable);
            String indexVariable = compilerContext.generateVariable("index");
            stream.write(new Loop.Start(listVariable, itemVariable, indexVariable));
            stream.write(new VariableBinding.Start(loopStatusVar, buildStatusObj(indexVariable, collectionSizeVar)));
        }

        @Override
        public void afterChildren(PushStream stream) {
            stream.write(VariableBinding.END);
            stream.write(Loop.END);
        }

        @Override
        public void afterElement(PushStream stream) {
            stream.write(Conditional.END);
            stream.write(VariableBinding.END);
            stream.write(VariableBinding.END);
        }

        private String decodeItemVariable() {
            String[] args = callInfo.getArguments();
            if (args.length > 0) {
                return args[0];
            }
            return Syntax.DEFAULT_LIST_ITEM_VAR_NAME;
        }

        private MapLiteral buildStatusObj(String indexVar, String sizeVar) {
            HashMap<String, ExpressionNode> obj = new HashMap<>();
            Identifier indexId = new Identifier(indexVar);
            BinaryOperation firstExpr = new BinaryOperation(BinaryOperator.EQ, indexId, NumericConstant.ZERO);
            BinaryOperation lastExpr = new BinaryOperation(BinaryOperator.EQ, indexId, new BinaryOperation(BinaryOperator.SUB, new Identifier(sizeVar), NumericConstant.ONE));
            obj.put(INDEX, indexId);
            obj.put(COUNT, new BinaryOperation(BinaryOperator.ADD, indexId, NumericConstant.ONE));
            obj.put(FIRST, firstExpr);
            obj.put(MIDDLE, new UnaryOperation(UnaryOperator.NOT, new BinaryOperation(BinaryOperator.OR, firstExpr, lastExpr)));
            obj.put(LAST, lastExpr);
            obj.put(ODD, parityCheck(indexId, NumericConstant.ZERO));
            obj.put(EVEN, parityCheck(indexId, NumericConstant.ONE));
            return new MapLiteral(obj);
        }

        private ExpressionNode parityCheck(ExpressionNode numericExpression, NumericConstant expected) {
            return new BinaryOperation(BinaryOperator.EQ, new BinaryOperation(BinaryOperator.REM, numericExpression, NumericConstant.TWO), expected);
        }
    };
}

Example 13 with ExpressionNode

use of org.apache.sling.scripting.sightly.compiler.expression.ExpressionNode in project sling by apache.

the class ExpressionWrapperTest method testFormatOptionsRemoval.

@Test
public void testFormatOptionsRemoval() {
    Interpolation interpolation = new Interpolation();
    Map<String, ExpressionNode> options = new HashMap<>();
    List<ExpressionNode> formatArray = new ArrayList<>();
    formatArray.add(new StringConstant("John"));
    formatArray.add(new StringConstant("Doe"));
    options.put(FormatFilter.FORMAT_OPTION, new ArrayLiteral(formatArray));
    interpolation.addExpression(new Expression(new StringConstant("Hello {0} {1}"), options));
    ExpressionWrapper wrapper = new ExpressionWrapper(filters);
    Expression result = wrapper.transform(interpolation, MarkupContext.TEXT, ExpressionContext.TEXT);
    List<ExpressionNode> xssArguments = runOptionsAndXSSAssertions(result, 0);
    RuntimeCall format = (RuntimeCall) xssArguments.get(0);
    assertEquals(RuntimeFunction.FORMAT, format.getFunctionName());
}

Example 14 with ExpressionNode

use of org.apache.sling.scripting.sightly.compiler.expression.ExpressionNode in project sling by apache.

the class SyntheticMapRemoval method overrideMap.

private MapLiteral overrideMap(String variableName, MapLiteral mapLiteral) {
    Map<String, ExpressionNode> newLiteral = new HashMap<>();
    for (Map.Entry<String, ExpressionNode> entry : mapLiteral.getMap().entrySet()) {
        String property = entry.getKey();
        ExpressionNode valueNode = entry.getValue();
        String valueVariable = valueVariableName(variableName, property);
        newLiteral.put(property, new Identifier(valueVariable));
        outputStream.write(new VariableBinding.Start(valueVariable, valueNode));
    }
    return new MapLiteral(newLiteral);
}

Example 15 with ExpressionNode

use of org.apache.sling.scripting.sightly.compiler.expression.ExpressionNode in project sling by apache.

the class ConstantFolding method visit.

@Override
public void visit(VariableBinding.Start variableBindingStart) {
    String variable = variableBindingStart.getVariableName();
    ExpressionNode node = variableBindingStart.getExpression();
    EvalResult result = ExpressionReducer.reduce(node, tracker);
    result = avoidFoldingDataStructures(result);
    tracker.pushVariable(variable, result);
    outStream.write(new VariableBinding.Start(variable, result.getNode()));
}