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


        context.put("a1","test");
        context.put("b1","test");
        Writer writer = new StringWriter();


        ve.evaluate(context,writer,"test","$a1 no problem");


        try {
            ve.evaluate(context,writer,"test","$a1 $c1 $a1.length() $a1.foobar()");
            fail ("Expected exception.");
        } catch (RuntimeException E) {}

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        Writer writer = new StringWriter();


        ve.evaluate(context,writer,"test","$a1 no problem");


        try {
            ve.evaluate(context,writer,"test","$a1 $c1 $a1.length() $a1.foobar()");
            fail ("Expected exception.");
        } catch (RuntimeException E) {}




        log("Caught invalid references (global configuration).");

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        // test normal reference
        context = new VelocityContext();
        writer = new StringWriter();
        context.put("bold","<b>");
        ve.evaluate(context,writer,"test","$bold test & test");
        assertEquals("&lt;b&gt; test & test",writer.toString());


        // test method reference
        context = new VelocityContext();
        writer = new StringWriter();

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        // test method reference
        context = new VelocityContext();
        writer = new StringWriter();
        context.put("bold","<b>");
        ve.evaluate(context,writer,"test","$bold.substring(0,1)");
        assertEquals("&lt;",writer.toString());


        log("Escape matched all references (global configuration)");


    }

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        Writer writer;


        // Html no JavaScript
        writer = new StringWriter();
        ve.evaluate(newEscapeContext(),writer,"test","$test1");
        assertEquals("Jimmy's &lt;b&gt;pizza&lt;/b&gt;",writer.toString());


        // comment out bad test -- requires latest commons-lang
        /**

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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);


        log("PrintException handler successful.");

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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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        Context context = new VelocityContext();
        context.put("lt","<");
        context.put("gt",">");
        StringWriter writer = new StringWriter();
        ve.evaluate(context, writer, "test","${lt}test${gt} #evaluate('${lt}test2${gt}')");
        assertEquals("&lt;test&gt; &lt;test2&gt;", writer.toString());
        
    }

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