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


        // 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());
    }


    /**
     * test that escape reference handler works with match restrictions

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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());


        // JavaScript and HTML
        writer = new StringWriter();
        ve.evaluate(newEscapeContext(),writer,"test","$test1_js");

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        ve.evaluate(newEscapeContext(),writer,"test","$test1");
        assertEquals("Jimmy's &lt;b&gt;pizza&lt;/b&gt;",writer.toString());


        // JavaScript and HTML
        writer = new StringWriter();
        ve.evaluate(newEscapeContext(),writer,"test","$test1_js");
        assertEquals("Jimmy\\'s &lt;b&gt;pizza&lt;/b&gt;",writer.toString());


        // JavaScript and HTML
        writer = new StringWriter();
        ve.evaluate(newEscapeContext(),writer,"test","$test1_js_test");

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        ve.evaluate(newEscapeContext(),writer,"test","$test1_js");
        assertEquals("Jimmy\\'s &lt;b&gt;pizza&lt;/b&gt;",writer.toString());


        // JavaScript and HTML
        writer = new StringWriter();
        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)");

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        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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        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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        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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        }


        context = new VelocityContext();
        w = new StringWriter();
        context.put("test","abc");
        ve2.evaluate( context, w, "test", "$test" );
        if ( !w.toString().equals( "ABCabc" ))
        {
            fail( "Reference insertion test 2");
        }

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        // 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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