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

        // sequence2
        context = new VelocityContext();
        w = new StringWriter();
        context.put("test",new ArrayList());


        ve2.evaluate( context, w, "test", "$test.get(0)");


        // check log on null set with both sequences
        // sequence 1
        context = new VelocityContext();
        w = new StringWriter();

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        // sequence 2
        context = new VelocityContext();
        w = new StringWriter();
        logString = null;
        ve2.evaluate( context, w, "test", "#set($test1 = $test2)" );
        if ( logString != null)
        {
            fail( "log null set test 2");
        }

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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,"testMacro","#macro(aa $blarg) #set(!! = bb) #end #aa('aa')");
            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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        VelocityEngine ve = new VelocityEngine();
        ve.init();
        
        Context context = new VelocityContext();        
        StringWriter writer = new StringWriter();
        ve.evaluate(context, writer, "test","abc #* test\r\ntest2*#\r\ndef");
        assertEquals("abc \r\ndef", writer.toString());
    }


    /**
     * Test single line comments

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        VelocityEngine ve = new VelocityEngine();
        ve.init();
        
        Context context = new VelocityContext();        
        StringWriter writer = new StringWriter();
        ve.evaluate(context, writer, "test","123 ## test test\r\nabc");
        assertEquals("123 abc", writer.toString());        
    
        context = new VelocityContext();        
        writer = new StringWriter();
        ve.evaluate(context, writer, "test","123 \r\n## test test\r\nabc");

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