Examples of org.apache.commons.betwixt.io.BeanWriter

org.apache.commons.betwixt.io.BeanWriter

BeanWriter outputs beans as XML to an io stream.

The output for each bean is an xml fragment (rather than a well-formed xml-document). This allows bean representations to be appended to a document by writing each in turn to the stream. So to create a well formed xml document, you'll need to write the prolog to the stream first. If you append more than one bean to the stream, then you'll need to add a wrapping root element as well.
The line ending to be used is set by {@link #setEndOfLine}.
The output can be formatted (with whitespace) for easy reading by calling {@link #enablePrettyPrint}. The output will be indented. The indent string used is set by {@link #setIndent}.
Bean graphs can sometimes contain cycles. Care must be taken when serializing cyclic bean graphs since this can lead to infinite recursion. The approach taken by BeanWriter is to automatically assign an ID attribute value to beans. When a cycle is encountered, an element is written that has the IDREF attribute set to the id assigned earlier.
The names of the ID and IDREF attributes used can be customized by the XMLBeanInfo. The id's used can also be customized by the user via IDGenerator subclasses. The implementation used can be set by the IdGenerator property. BeanWriter defaults to using SequentialIDGenerator which supplies id values in numeric sequence.
If generated ID attribute values are not acceptable in the output, then this can be disabled by setting the WriteIDs property to false. If a cyclic reference is encountered in this case then a CyclicReferenceException will be thrown. When the WriteIDs property is set to false, it is recommended that this exception is caught by the caller. @author James Strachan @author Martin van den Bemt

        Element element = new Element();
        element.setValue("<greeting>What Ho Jeeves!</greeting>");
        
        StringWriter out = new StringWriter();
        out.write("<?xml version='1.0'?>");
        BeanWriter writer = new BeanWriter(out);
        writer.getXMLIntrospector().getConfiguration().setAttributesForPrimitives(false);
        writer.getBindingConfiguration().setMapIDs(false);
        XMLBeanInfo elementInfo = writer.getXMLIntrospector().introspect(Element.class);
        elementInfo.getElementDescriptor().getElementDescriptors()[0]
            .getOptions().addOption(MixedContentEncodingStrategy.ENCODING_OPTION_NAME, "CDATA");  
         
        writer.setEndOfLine("\n"); //force to \n so expected values match for sure
        writer.write(element);
        
        String expected = "<?xml version='1.0'?><Element>\n<value><![CDATA[<greeting>What Ho Jeeves!</greeting>]]></value>\n</Element>\n";
        String xml = out.getBuffer().toString();
         
        assertEquals(expected,xml);

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        Element element = new Element();
        element.setValue("<greeting>What Ho Jeeves!</greeting>");
        
        StringWriter out = new StringWriter();
        out.write("<?xml version='1.0'?>");
        BeanWriter writer = new BeanWriter(out);
        writer.getXMLIntrospector().getConfiguration().setAttributesForPrimitives(false);
        writer.getBindingConfiguration().setMapIDs(false);
        XMLBeanInfo elementInfo = writer.getXMLIntrospector().introspect(Element.class);
        elementInfo.getElementDescriptor().getElementDescriptors()[0]
            .getOptions().addOption("org.apache.commons.betwixt.mixed-content-encoding", "escaped");
        writer.setEndOfLine("\n"); //force to \n so expected values match for sure
        writer.write(element);
        
        String expected = "<?xml version='1.0'?><Element>\n<value>&lt;greeting&gt;What Ho Jeeves!&lt;/greeting&gt;</value>\n</Element>\n";
        String xml = out.getBuffer().toString();
         
        assertEquals(expected,xml);

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                            true);
    }
    
    public void testBeanWriterWorksWithAnAddMethodAndACollection() throws Exception {


        BeanWriter bw = new BeanWriter();
        try {
            bw.write(new BeanWithAddMethod());
        } catch (IllegalArgumentException e) {
            fail("BeanWriter fails when a method is just called add(<type>) and there is also a collection");
        }
    }

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        bean.setB("<strong>weak</strong>");
        bean.setC("<strong>weak</strong>");
        
        StringWriter out = new StringWriter();
        out.write("<?xml version='1.0'?>");
        BeanWriter writer = new BeanWriter(out);
        writer.getXMLIntrospector().getConfiguration().setAttributesForPrimitives(false);
        writer.getBindingConfiguration().setMapIDs(false);
        writer.setEndOfLine("\n"); //force to \n so expected values match for sure
        writer.write(bean);
        
        String expected = "<?xml version='1.0'?>" +
            "<greek-abc>\n" +
            "<alpha><![CDATA[<strong>weak</strong>]]></alpha>\n" +
            "<beta>&lt;strong&gt;weak&lt;/strong&gt;</beta>\n" +

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    public void testWriteSimpleDotBetwixtWithNamespaces() throws Exception {
        PersonWithNamespace bean = new PersonWithNamespace("Robert", "Burrell", "Donkin");
        StringWriter out = new StringWriter();
        out.write("<?xml version='1.0'?>");
        BeanWriter writer = new BeanWriter(out);
        writer.getBindingConfiguration().setMapIDs(false);
        writer.getXMLIntrospector().getConfiguration().getPrefixMapper()
            .setPrefix("http://jakarta.apache.org/commons/betwixt/PersonWithNamespaceExample", "pn");
        writer.write(bean);
        
        String xml = out.getBuffer().toString();
        
        String expected = "<?xml version='1.0'?>" +
                        "<pn:person " +

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        Element element = new Element();
        element.setValue("<greeting>What Ho Jeeves!</greeting>");
        
        StringWriter out = new StringWriter();
        out.write("<?xml version='1.0'?>");
        BeanWriter writer = new BeanWriter(out);
        writer.getXMLIntrospector().getConfiguration().setAttributesForPrimitives(false);
        writer.getBindingConfiguration().setMapIDs(false);
        writer.setMixedContentEncodingStrategy(new TestBaseMixedContentEncoding(false));
        writer.setEndOfLine("\n"); //force to \n so expected values match for sure
        writer.write(element);
        
        String expected = "<?xml version='1.0'?><Element>\n<value>&lt;greeting&gt;What Ho Jeeves!&lt;/greeting&gt;</value>\n</Element>\n";
        String xml = out.getBuffer().toString();
         
        assertEquals(expected,xml);

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        Element element = new Element();
        element.setValue("<greeting>What Ho Jeeves!</greeting>");
        
        StringWriter out = new StringWriter();
        out.write("<?xml version='1.0'?>");
        BeanWriter writer = new BeanWriter(out);
        writer.getXMLIntrospector().getConfiguration().setAttributesForPrimitives(false);
        writer.getBindingConfiguration().setMapIDs(false);
        writer.setMixedContentEncodingStrategy(new TestBaseMixedContentEncoding(true));
        writer.setEndOfLine("\n"); //force to \n so expected values match for sure
        writer.write(element);
        
        String expected = "<?xml version='1.0'?><Element>\n<value><![CDATA[<greeting>What Ho Jeeves!</greeting>]]></value>\n</Element>\n";
        String xml = out.getBuffer().toString();
         
        assertEquals(expected,xml);

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    }


    public void testHasClassElementWithoutDotBetwixtFile() throws Exception {
        // configure bean writer with counting suppression strategy...
        StringWriter buffer = new StringWriter();
        BeanWriter beanWriter = new BeanWriter(buffer);
        beanWriter.getXMLIntrospector().getConfiguration().setPropertySuppressionStrategy(
                new PropertySuppressionStrategy() {


                    public boolean suppressProperty(Class clazz, Class propertyType,
                            String propertyName) {
                        return false;
                    }
                });


        // test with class without dot-betwixt file...
        Object bean = new Locale("de", "de"); // just a bean with some properties
        beanWriter.write(bean);


        // was the class element written?..
        assertTrue(buffer.toString().indexOf("<class>" + bean.getClass().getName() + "</class>") > 0);  
    }

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    }


    public void testHasClassElementWithDotBetwixtFile() throws Exception {
        // configure bean writer with counting suppression strategy...
        StringWriter buffer = new StringWriter();
        BeanWriter beanWriter = new BeanWriter(buffer);
        beanWriter.getXMLIntrospector().getConfiguration().setPropertySuppressionStrategy(
                new PropertySuppressionStrategy() {


                    public boolean suppressProperty(Class clazz, Class propertyType,
                            String propertyName) {
                        return false;
                    }
                });


        // test with class without dot-betwixt file...
        Object bean = new SimpleClass();
        beanWriter.write(bean);


        // was the class element written?..
        assertTrue(buffer.toString().indexOf("<class>" + bean.getClass().getName() + "</class>") > 0);
    }

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        alphaBean.addChild(betaBeanTwo);
        BetaBean betaBeanThree = new BetaBean("THREE");
        alphaBean.put("Key", betaBeanThree);
        
        StringWriter out = new StringWriter();
        BeanWriter writer = new BeanWriter(out);
        writer.getBindingConfiguration().setMapIDs(false);
        writer.getBindingConfiguration().setObjectStringConverter(new PrependingConverter());
        writer.write(alphaBean);
        
        String xml = "<alpha>" +
                "        <name>BananasSIX</name>" +
                "        <betaBean>" +
                "            <name>PeachONE</name>" +

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