Examples of freemarker.template.DefaultObjectWrapperBuilder

freemarker.template.DefaultObjectWrapperBuilder
Gets/creates a {@link DefaultObjectWrapper} singleton instance that's already configured as specified in theproperties of this object; this is recommended over using the {@link DefaultObjectWrapper} constructors. The returnedinstance can't be further configured (it's write protected).
See {@link BeansWrapperBuilder} for more info, as that works identically. @since 2.3.21

        assertTrue(hardReferences.size() != 0);  // just to save it from GC until this line        
    }


    public void testDefaultObjectWrapperFactoryProducts() throws Exception {
        {
            DefaultObjectWrapperBuilder factory = new DefaultObjectWrapperBuilder(Configuration.VERSION_2_3_19);
            factory.setSimpleMapWrapper(true);
            BeansWrapper bw = factory.build();
            assertSame(bw, factory.build());
            assertSame(bw.getClass(), DefaultObjectWrapper.class);
            assertEquals(Configuration.VERSION_2_3_0, bw.getIncompatibleImprovements());
            assertTrue(bw.isWriteProtected());
            assertTrue(bw.isSimpleMapWrapper());
            assertTrue(bw.wrap(new HashMap()) instanceof SimpleHash);
            assertTrue(bw.isClassIntrospectionCacheRestricted());
        }
        
        {
            DefaultObjectWrapperBuilder factory = new DefaultObjectWrapperBuilder(Configuration.getVersion());
            factory.setSimpleMapWrapper(true);
            BeansWrapper bw = factory.build();
            assertSame(bw, factory.build());
            assertSame(bw.getClass(), DefaultObjectWrapper.class);
            assertEquals(
                    BeansWrapper.normalizeIncompatibleImprovementsVersion(Configuration.getVersion()),
                    bw.getIncompatibleImprovements());
            assertTrue(bw.isWriteProtected());
            assertTrue(bw.isSimpleMapWrapper());
            assertTrue(bw.wrap(new HashMap()) instanceof SimpleHash);
        }
        
        {
            BeansWrapper bw = new DefaultObjectWrapperBuilder(Configuration.VERSION_2_3_19).build();
            assertSame(bw.getClass(), DefaultObjectWrapper.class);
            assertEquals(Configuration.VERSION_2_3_0, bw.getIncompatibleImprovements());
            assertTrue(bw.isWriteProtected());
            assertFalse(bw.isSimpleMapWrapper());
            assertTrue(bw.wrap(new HashMap()) instanceof SimpleHash);
            
            assertSame(bw, new DefaultObjectWrapperBuilder(Configuration.VERSION_2_3_20).build());
            assertSame(bw, new DefaultObjectWrapperBuilder(Configuration.VERSION_2_3_0).build());
            assertSame(bw, new DefaultObjectWrapperBuilder(new Version(2, 3, 5)).build());
        }
        
        {
            BeansWrapper bw = new DefaultObjectWrapperBuilder(Configuration.VERSION_2_3_21).build();
            assertSame(bw.getClass(), DefaultObjectWrapper.class);
            assertEquals(Configuration.VERSION_2_3_21, bw.getIncompatibleImprovements());
            assertTrue(bw.isWriteProtected());
            assertFalse(bw.isSimpleMapWrapper());
            assertTrue(bw.wrap(new HashMap()) instanceof SimpleHash);
            assertTrue(bw.isClassIntrospectionCacheRestricted());
            
            assertSame(bw, new DefaultObjectWrapperBuilder(Configuration.VERSION_2_3_21).build());
        }


        {
            BeansWrapper bw = new DefaultObjectWrapperBuilder(Configuration.VERSION_2_3_19).build();
            assertEquals(Configuration.VERSION_2_3_0, bw.getIncompatibleImprovements());
        }
        
        {
            DefaultObjectWrapperBuilder factory = new DefaultObjectWrapperBuilder(Configuration.VERSION_2_3_19);
            factory.setExposureLevel(BeansWrapper.EXPOSE_PROPERTIES_ONLY);
            BeansWrapper bw = factory.build();
            BeansWrapper bw2 = factory.build();
            assertSame(bw, bw2);  // not cached
            
            assertSame(bw.getClass(), DefaultObjectWrapper.class);
            assertEquals(Configuration.VERSION_2_3_0, bw.getIncompatibleImprovements());
            assertTrue(bw.isWriteProtected());
            assertFalse(bw.isSimpleMapWrapper());
            assertTrue(bw.wrap(new HashMap()) instanceof SimpleHash);
            assertEquals(BeansWrapper.EXPOSE_PROPERTIES_ONLY, bw.getExposureLevel());
        }
        
        {
            DefaultObjectWrapperBuilder factory = new DefaultObjectWrapperBuilder(Configuration.VERSION_2_3_19);
            factory.setExposeFields(true);
            BeansWrapper bw = factory.build();
            BeansWrapper bw2 = factory.build();
            assertSame(bw, bw2);  // not cached
            
            assertSame(bw.getClass(), DefaultObjectWrapper.class);
            assertEquals(Configuration.VERSION_2_3_0, bw.getIncompatibleImprovements());
            assertTrue(bw.isWriteProtected());

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    private static class TemplateLoader extends CacheLoader<Class<?>, Configuration> {
        @Override
        public Configuration load(Class<?> key) throws Exception {
            final Configuration configuration = new Configuration(FREEMARKER_VERSION);
            configuration.setObjectWrapper(new DefaultObjectWrapperBuilder(FREEMARKER_VERSION).build());
            configuration.loadBuiltInEncodingMap();
            configuration.setDefaultEncoding(Charsets.UTF_8.name());
            configuration.setClassForTemplateLoading(key, "/");
            return configuration;
        }

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    public String getSuffixOfTemplatingEngine() {
        return FILE_SUFFIX;
    }
    
    private BeansWrapper createBeansWrapperWithExposedFields() {
        DefaultObjectWrapperBuilder defaultObjectWrapperBuilder 
            = new DefaultObjectWrapperBuilder(INCOMPATIBLE_IMPROVEMENTS_VERSION);
        defaultObjectWrapperBuilder.setExposeFields(true);
        DefaultObjectWrapper defaultObjectWrapper = defaultObjectWrapperBuilder.build();
        return defaultObjectWrapper;
    }

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