Examples of org.apache.velocity.app.VelocityEngine.evaluate()

Class org.apache.velocity.app.VelocityEngine

Examples of org.apache.velocity.app.VelocityEngine.evaluate()

org.apache.velocity.app.VelocityEngine.evaluate()
renders the input string using the context into the output writer. To be used when a template is dynamically constructed, or want to use Velocity as a token replacer. @param context context to use in rendering input string @param out Writer in which to render the output @param logTag string to be used as the template name for log messages in case of error @param instring input string containing the VTL to be rendered @return true if successful, false otherwise. If false, seeVelocity runtime log

        ve.evaluate(newEscapeContext(),writer,"test","$test1_js_test");
        assertEquals("Jimmy\\'s &lt;b&gt;pizza&lt;/b&gt;",writer.toString());


        // JavaScript and HTML (method call)
        writer = new StringWriter();
        ve.evaluate(newEscapeContext(),writer,"test","$test1_js.substring(0,7)");
        assertEquals("Jimmy\\'s",writer.toString());
    }


    private Context newEscapeContext()
    {

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        Writer writer = new StringWriter();


        try
        {
            ve.evaluate(context,writer,"test","   #set($abc)   ");
            fail("Should have thown a ParseErrorException");
        }
        catch (ParseErrorException e)
        {
            assertEquals("test",e.getTemplateName());

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        Writer writer = new StringWriter();


        try
        {
            ve.evaluate(context,writer,"testMacro","#macro($blarg) foo #end");
            fail("Should have thown a ParseErrorException");
        }
        catch (ParseErrorException e)
        {
            assertEquals("testMacro",e.getTemplateName());

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        Writer writer = new StringWriter();


        try
        {
            ve.evaluate(context,writer,"testMacroInvoke", "#macro(   foo $a) $a #end #foo(woogie)");
            fail("Should have thown a ParseErrorException");
        }
        catch (ParseErrorException e)
        {
            assertEquals("testMacroInvoke",e.getTemplateName());

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        Writer writer = new StringWriter();
        
        try 
        {
            ve.evaluate(context,writer,"testMacroInvoke", "#macro(foo $a) $a #end #foo('test1' 'test2')");     
            fail("Should have thown a ParseErrorException");
        } 
        catch (ParseErrorException e) 
        {
            assertEquals("testMacroInvoke",e.getTemplateName());

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        Writer writer = new StringWriter();


        // will not throw an exception
        try 
        {
            ve.evaluate(context,writer,"testMacroInvoke", "#macro(foo $a) $a #end #foo('test1' 'test2')");     
        }
        finally
        {
            if (writer != null)
            {

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        assertTrue(writer.toString().indexOf("Index: 0, Size: 0") != -1);
        assertTrue(writer.toString().indexOf("ArrayList") == -1);


        // stack trace
        writer = new StringWriter();
        ve3.evaluate(context,writer,"test","$list.get(0)");
        assertTrue(writer.toString().indexOf("IndexOutOfBoundsException") != -1);
        assertTrue(writer.toString().indexOf("ArrayList") != -1);
    }


    public void testIncludeNotFound() throws Exception

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        // let velocity parse and generate the result in buffer
        VelocityEngine engine = getVelocityEngine();
        if (log.isDebugEnabled()) {
            log.debug("Velocity is evaluating using velocity context: " + variableMap);
        }
        engine.evaluate(velocityContext, buffer, logTag, reader);


        // now lets output the results to the exchange
        Message out = exchange.getOut();
        out.setBody(buffer.toString());
        out.setHeader(VelocityConstants.VELOCITY_RESOURCE, resource);

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        Context velocityContext = new VelocityContext(variableMap);


        // let velocity parse and generate the result in buffer
        VelocityEngine engine = getVelocityEngine();
        log.debug("Velocity is evaluating using velocity context: {}", variableMap);
        engine.evaluate(velocityContext, buffer, logTag, reader);


        // now lets output the results to the exchange
        Message out = exchange.getOut();
        out.setBody(buffer.toString());
        out.setHeaders(exchange.getIn().getHeaders());

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        Context velocityContext = new VelocityContext(variableMap);


        // let velocity parse and generate the result in buffer
        VelocityEngine engine = getVelocityEngine();
        log.debug("Velocity is evaluating using velocity context: {}", variableMap);
        engine.evaluate(velocityContext, buffer, logTag, reader);


        // now lets output the results to the exchange
        Message out = exchange.getOut();
        out.setBody(buffer.toString());

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