Examples of javax.servlet.jsp.el.VariableResolver

javax.servlet.jsp.el.VariableResolver

This class is used to customize the way an ExpressionEvaluator resolves variable references at evaluation time. For example, instances of this class can implement their own variable lookup mechanisms, or introduce the notion of "implicit variables" which override any other variables. An instance of this class should be passed when evaluating an expression.

An instance of this class includes the context against which resolution will happen
@since 2.0 @deprecated As of JSP 2.1, replaced by javax.el.ELResolver

    public Boolean evalCond(final Context ctx, final String expr)
    throws SCXMLExpressionException {
        if (expr == null) {
            return null;
        }
        VariableResolver vr = null;
        if (ctx instanceof VariableResolver) {
            vr = (VariableResolver) ctx;
        } else {
            vr = new ContextWrapper(ctx);
        }

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    public Node evalLocation(final Context ctx, final String expr)
    throws SCXMLExpressionException {
        if (expr == null) {
            return null;
        }
        VariableResolver vr = null;
        if (ctx instanceof VariableResolver) {
            vr = (VariableResolver) ctx;
        } else {
            vr = new ContextWrapper(ctx);
        }

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    public void actionPerformed(ActionEvent ev) {
      try {
        StaticFunctionMapper functionMapper = StaticFunctionMapper.getDefault();
        ExpressionEvaluator eval = new ExpressionEvaluatorImpl();
        VariableResolver resolver = new DefaultVariables(uriText.getText(), null, null);
        resultText.setText((String) eval.evaluate(elText.getText(), String.class, resolver, functionMapper));
      } catch (ELException e) {
        ExceptionDialog.show(TestingTool.this, e);
      }
    }

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     * @return The XML PI filter.
     */
    private PreprocessingFilter createPIHandler(EntityResolver resolver, XMLReader reader) {
        PreprocessingFilter filter = new PreprocessingFilter(reader);
        ProcessingInstructionHandler resolvingHandler = new ExpressionHandler(
                new VariableResolver() {


                    public Object resolveVariable(String name)
                            throws ELException {
                        if ("date".equals(name)) {
                            return DateFormat.getDateInstance(

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        body.invoke(bodyExpansion);
        String expansion = bodyExpansion.getBuffer().toString();
        String expression = expansion.replaceAll("#\\{", "\\$\\{");
        
        PageContext pageContext = (PageContext) getJspContext();        
        VariableResolver varResolver = getJspContext().getVariableResolver();
        JspWriter out = pageContext.getOut();
        try {
          // Rahul - 9/13/04 - EL functions are not supported.
          // Since this is in the body of a <vxml:prompt> element, the 
          // result needs to be a String

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     * attribute with a matching name.
     */
    public VariableResolver getVariableResolver() {
        final PageContext ctx = this;


        return new VariableResolver() {
            public Object resolveVariable(String name) throws ELException {
                return ctx.findAttribute(name);
            }
        };
    }

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     * attribute with a matching name.
     */
    public VariableResolver getVariableResolver() {
        final PageContext ctx = this;


        return new VariableResolver() {
            public Object resolveVariable(String name) throws ELException {
                return ctx.findAttribute(name);
            }
        };
    }

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     * @return The XML PI filter.
     */
    private PreprocessingFilter createPIHandler(EntityResolver resolver, XMLReader reader) {
        PreprocessingFilter filter = new PreprocessingFilter(reader);
        ProcessingInstructionHandler resolvingHandler = new ExpressionHandler(
                new VariableResolver() {


                    public Object resolveVariable(String name)
                            throws ELException {
                        if ("date".equals(name)) {
                            return DateFormat.getDateInstance(

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                    Result result = new StreamResult(targetFile.getAbsolutePath());
          XMLReader reader = factory.newSAXParser().getXMLReader();
          reader.setEntityResolver(resolver);
          PreprocessingFilter filter = new PreprocessingFilter(reader);
          ProcessingInstructionHandler resolvingHandler = new ExpressionHandler(
              new VariableResolver() {


                public Object resolveVariable(String name)
                    throws ELException {
                  if ("date".equals(name)) {
                    return DateFormat.getDateInstance(

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                Result result = new StreamResult(targetFile);
                XMLReader reader = factory.newSAXParser().getXMLReader();
                reader.setEntityResolver(resolver);
                PreprocessingFilter filter = new PreprocessingFilter(reader);
                ProcessingInstructionHandler resolvingHandler = new ExpressionHandler(
                        new VariableResolver() {


                            private Map tree = ExpressionUtils.createTree(getMavenProject().getProperties());


                            public Object resolveVariable(String name)
                                    throws ELException {

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