Java Code Examples for org.springframework.core.convert.support.GenericConversionService

@Test
public void customConversion() throws Exception {
	DefaultMessageHandlerMethodFactory instance = createInstance();
	GenericConversionService conversionService = new GenericConversionService();
	conversionService.addConverter(SampleBean.class, String.class, new Converter<SampleBean, String>() {
		@Override
		public String convert(SampleBean source) {
			return "foo bar";
		}
	});
	instance.setConversionService(conversionService);
	instance.afterPropertiesSet();

	InvocableHandlerMethod invocableHandlerMethod =
			createInvocableHandlerMethod(instance, "simpleString", String.class);

	invocableHandlerMethod.invoke(MessageBuilder.withPayload(sample).build());
	assertMethodInvocation(sample, "simpleString");
}
 

@Test
public void testConvertAndHandleNull() { // SPR-9445
	// without null conversion
	evaluateAndCheckError("null or true", SpelMessage.TYPE_CONVERSION_ERROR, 0, "null", "boolean");
	evaluateAndCheckError("null and true", SpelMessage.TYPE_CONVERSION_ERROR, 0, "null", "boolean");
	evaluateAndCheckError("!null", SpelMessage.TYPE_CONVERSION_ERROR, 1, "null", "boolean");
	evaluateAndCheckError("null ? 'foo' : 'bar'", SpelMessage.TYPE_CONVERSION_ERROR, 0, "null", "boolean");

	// with null conversion (null -> false)
	GenericConversionService conversionService = new GenericConversionService() {
		@Override
		protected Object convertNullSource(TypeDescriptor sourceType, TypeDescriptor targetType) {
			return targetType.getType() == Boolean.class ? false : null;
		}
	};
	context.setTypeConverter(new StandardTypeConverter(conversionService));

	evaluate("null or true", Boolean.TRUE, Boolean.class, false);
	evaluate("null and true", Boolean.FALSE, Boolean.class, false);
	evaluate("!null", Boolean.TRUE, Boolean.class, false);
	evaluate("null ? 'foo' : 'bar'", "bar", String.class, false);
}
 

@Test
public void test_binaryPlusWithTimeConverted() {
	SimpleDateFormat format = new SimpleDateFormat("hh :--: mm :--: ss", Locale.ENGLISH);

	GenericConversionService conversionService = new GenericConversionService();
	conversionService.addConverter(Time.class, String.class, format::format);

	StandardEvaluationContext evaluationContextConverter = new StandardEvaluationContext();
	evaluationContextConverter.setTypeConverter(new StandardTypeConverter(conversionService));

	ExpressionState expressionState = new ExpressionState(evaluationContextConverter);
	Time time = new Time(new Date().getTime());

	VariableReference var = new VariableReference("timeVar", -1, -1);
	var.setValue(expressionState, time);

	StringLiteral n2 = new StringLiteral("\" is now\"", -1, -1, "\" is now\"");
	OpPlus o = new OpPlus(-1, -1, var, n2);
	TypedValue value = o.getValueInternal(expressionState);

	assertEquals(String.class, value.getTypeDescriptor().getObjectType());
	assertEquals(String.class, value.getTypeDescriptor().getType());
	assertEquals(format.format(time) + " is now", value.getValue());
}
 

@Test
public void testCustomConverter() {
	DefaultListableBeanFactory lbf = new DefaultListableBeanFactory();
	GenericConversionService conversionService = new DefaultConversionService();
	conversionService.addConverter(new Converter<String, Float>() {
		@Override
		public Float convert(String source) {
			try {
				NumberFormat nf = NumberFormat.getInstance(Locale.GERMAN);
				return nf.parse(source).floatValue();
			}
			catch (ParseException ex) {
				throw new IllegalArgumentException(ex);
			}
		}
	});
	lbf.setConversionService(conversionService);
	MutablePropertyValues pvs = new MutablePropertyValues();
	pvs.add("myFloat", "1,1");
	RootBeanDefinition bd = new RootBeanDefinition(TestBean.class);
	bd.setPropertyValues(pvs);
	lbf.registerBeanDefinition("testBean", bd);
	TestBean testBean = (TestBean) lbf.getBean("testBean");
	assertTrue(testBean.getMyFloat().floatValue() == 1.1f);
}
 

@Test
public void customConversion() throws Exception {
	DefaultMessageHandlerMethodFactory instance = createInstance();
	GenericConversionService conversionService = new GenericConversionService();
	conversionService.addConverter(SampleBean.class, String.class, new Converter<SampleBean, String>() {
		@Override
		public String convert(SampleBean source) {
			return "foo bar";
		}
	});
	instance.setConversionService(conversionService);
	instance.afterPropertiesSet();

	InvocableHandlerMethod invocableHandlerMethod =
			createInvocableHandlerMethod(instance, "simpleString", String.class);

	invocableHandlerMethod.invoke(MessageBuilder.withPayload(sample).build());
	assertMethodInvocation(sample, "simpleString");
}
 

@Test
public void testConvertAndHandleNull() { // SPR-9445
	// without null conversion
	evaluateAndCheckError("null or true", SpelMessage.TYPE_CONVERSION_ERROR, 0, "null", "boolean");
	evaluateAndCheckError("null and true", SpelMessage.TYPE_CONVERSION_ERROR, 0, "null", "boolean");
	evaluateAndCheckError("!null", SpelMessage.TYPE_CONVERSION_ERROR, 1, "null", "boolean");
	evaluateAndCheckError("null ? 'foo' : 'bar'", SpelMessage.TYPE_CONVERSION_ERROR, 0, "null", "boolean");

	// with null conversion (null -> false)
	GenericConversionService conversionService = new GenericConversionService() {
		@Override
		protected Object convertNullSource(TypeDescriptor sourceType, TypeDescriptor targetType) {
			return targetType.getType() == Boolean.class ? false : null;
		}
	};
	context.setTypeConverter(new StandardTypeConverter(conversionService));

	evaluate("null or true", Boolean.TRUE, Boolean.class, false);
	evaluate("null and true", Boolean.FALSE, Boolean.class, false);
	evaluate("!null", Boolean.TRUE, Boolean.class, false);
	evaluate("null ? 'foo' : 'bar'", "bar", String.class, false);
}
 

@Test
public void testCustomConverter() {
	DefaultListableBeanFactory lbf = new DefaultListableBeanFactory();
	GenericConversionService conversionService = new DefaultConversionService();
	conversionService.addConverter(new Converter<String, Float>() {
		@Override
		public Float convert(String source) {
			try {
				NumberFormat nf = NumberFormat.getInstance(Locale.GERMAN);
				return nf.parse(source).floatValue();
			}
			catch (ParseException ex) {
				throw new IllegalArgumentException(ex);
			}
		}
	});
	lbf.setConversionService(conversionService);
	MutablePropertyValues pvs = new MutablePropertyValues();
	pvs.add("myFloat", "1,1");
	RootBeanDefinition bd = new RootBeanDefinition(TestBean.class);
	bd.setPropertyValues(pvs);
	lbf.registerBeanDefinition("testBean", bd);
	TestBean testBean = (TestBean) lbf.getBean("testBean");
	assertTrue(testBean.getMyFloat().floatValue() == 1.1f);
}
 

/**
 * Register custom converters within given
 * {@link org.springframework.core.convert.support.GenericConversionService}
 *
 * @param conversionService
 *            must not be null
 */
public void registerConvertersIn(GenericConversionService conversionService) {
	Assert.notNull(conversionService);

	for (Object converter : converters) {
		if (converter instanceof Converter) {
			conversionService.addConverter((Converter<?, ?>) converter);
		} else if (converter instanceof ConverterFactory) {
			conversionService.addConverterFactory((ConverterFactory<?, ?>) converter);
		} else if (converter instanceof GenericConverter) {
			conversionService.addConverter((GenericConverter) converter);
		} else {
			throw new IllegalArgumentException("Given object '" + converter
					+ "' expected to be a Converter, ConverterFactory or GenericeConverter!");
		}
	}
}
 

@Test
public void customConversion() throws Exception {
	DefaultMessageHandlerMethodFactory instance = createInstance();
	GenericConversionService conversionService = new GenericConversionService();
	conversionService.addConverter(SampleBean.class, String.class, new Converter<SampleBean, String>() {
		@Override
		public String convert(SampleBean source) {
			return "foo bar";
		}
	});
	instance.setConversionService(conversionService);
	instance.afterPropertiesSet();

	InvocableHandlerMethod invocableHandlerMethod =
			createInvocableHandlerMethod(instance, "simpleString", String.class);

	invocableHandlerMethod.invoke(MessageBuilder.withPayload(sample).build());
	assertMethodInvocation(sample, "simpleString");
}
 

@Test
@Deprecated
public void test() throws Exception {
	AnnotationMethodHandlerAdapter adapter = new AnnotationMethodHandlerAdapter();
	ConfigurableWebBindingInitializer binder = new ConfigurableWebBindingInitializer();
	GenericConversionService service = new DefaultConversionService();
	service.addConverter(new ColorConverter());
	binder.setConversionService(service);
	adapter.setWebBindingInitializer(binder);
	Spr7766Controller controller = new Spr7766Controller();
	MockHttpServletRequest request = new MockHttpServletRequest();
	request.setRequestURI("/colors");
	request.setPathInfo("/colors");
	request.addParameter("colors", "#ffffff,000000");
	MockHttpServletResponse response = new MockHttpServletResponse();
	adapter.handle(request, response, controller);
}
 

@Test
public void testConvertAndHandleNull() { // SPR-9445
	// without null conversion
	evaluateAndCheckError("null or true", SpelMessage.TYPE_CONVERSION_ERROR, 0, "null", "boolean");
	evaluateAndCheckError("null and true", SpelMessage.TYPE_CONVERSION_ERROR, 0, "null", "boolean");
	evaluateAndCheckError("!null", SpelMessage.TYPE_CONVERSION_ERROR, 1, "null", "boolean");
	evaluateAndCheckError("null ? 'foo' : 'bar'", SpelMessage.TYPE_CONVERSION_ERROR, 0, "null", "boolean");

	// with null conversion (null -> false)
	GenericConversionService conversionService = new GenericConversionService() {
		@Override
		protected Object convertNullSource(TypeDescriptor sourceType, TypeDescriptor targetType) {
			return targetType.getType() == Boolean.class ? false : null;
		}
	};
	eContext.setTypeConverter(new StandardTypeConverter(conversionService));

	evaluate("null or true", Boolean.TRUE, Boolean.class, false);
	evaluate("null and true", Boolean.FALSE, Boolean.class, false);
	evaluate("!null", Boolean.TRUE, Boolean.class, false);
	evaluate("null ? 'foo' : 'bar'", "bar", String.class, false);
}
 

@Test
public void testCustomConverter() {
	DefaultListableBeanFactory lbf = new DefaultListableBeanFactory();
	GenericConversionService conversionService = new DefaultConversionService();
	conversionService.addConverter(new Converter<String, Float>() {
		@Override
		public Float convert(String source) {
			try {
				NumberFormat nf = NumberFormat.getInstance(Locale.GERMAN);
				return nf.parse(source).floatValue();
			}
			catch (ParseException ex) {
				throw new IllegalArgumentException(ex);
			}
		}
	});
	lbf.setConversionService(conversionService);
	MutablePropertyValues pvs = new MutablePropertyValues();
	pvs.add("myFloat", "1,1");
	RootBeanDefinition bd = new RootBeanDefinition(TestBean.class);
	bd.setPropertyValues(pvs);
	lbf.registerBeanDefinition("testBean", bd);
	TestBean testBean = (TestBean) lbf.getBean("testBean");
	assertTrue(testBean.getMyFloat().floatValue() == 1.1f);
}
 

@Test
public void noDelegateMapConversion() {
	GenericConversionService conversionService = new GenericConversionService();
	GenericMapConverter mapConverter = new GenericMapConverter(conversionService);
	conversionService.addConverter(mapConverter);

	@SuppressWarnings("unchecked")
	Map<String, String> result = conversionService.convert("foo = bar, wizz = jogg", Map.class);
	assertThat(result, hasEntry("foo", "bar"));
	assertThat(result, hasEntry("wizz", "jogg"));

	assertThat(
			conversionService.canConvert(TypeDescriptor.valueOf(String.class), TypeDescriptor.map(Map.class,
					TypeDescriptor.valueOf(GenericMapConverterTests.class), TypeDescriptor.valueOf(Integer.class))),
			is(false));
}
 

/**
 * Populates the given {@link GenericConversionService} with the converters registered.
 *
 * @param conversionService the service to register.
 */
public void registerConvertersIn(final GenericConversionService conversionService) {
  for (Object converter : converters) {
    boolean added = false;

    if (converter instanceof Converter) {
      conversionService.addConverter((Converter<?, ?>) converter);
      added = true;
    }

    if (converter instanceof ConverterFactory) {
      conversionService.addConverterFactory((ConverterFactory<?, ?>) converter);
      added = true;
    }

    if (converter instanceof GenericConverter) {
      conversionService.addConverter((GenericConverter) converter);
      added = true;
    }

    if (!added) {
      throw new IllegalArgumentException("Given set contains element that is neither Converter nor ConverterFactory!");
    }
  }
}
 

protected GenericConversionService getConversionService(Workbook workbook,
		Map<String, Map<String, GenericEntity<Long, ?>>> idsMapping) {
	GenericConversionService service = new GenericConversionService();

	GenericEntityConverter genericEntityConverter = new GenericEntityConverter(importDataDao, workbook,
			new HashMap<Class<?>, Class<?>>(0), idsMapping);
	genericEntityConverter.setConversionService(service);
	service.addConverter(genericEntityConverter);

	service.addConverter(new ProjectConverter());
	service.addConverter(new ArtifactConverter());
	service.addConverter(new ExternalLinkWrapperConverter());

	DefaultConversionService.addDefaultConverters(service);

	return service;
}
 

/**
 * Convenience operation for converting a source object to the specified targetType.
 * {@link TypeDescriptor#forObject(Object)}.
 * @param source the source object
 * @param targetType the target type
 * @param <T> 泛型标记
 * @return the converted value
 * @throws IllegalArgumentException if targetType is {@code null},
 * or sourceType is {@code null} but source is not {@code null}
 */
@Nullable
public static <T> T convert(@Nullable Object source, Class<T> targetType) {
	if (source == null) {
		return null;
	}
	if (ClassUtil.isAssignableValue(targetType, source)) {
		return (T) source;
	}
	GenericConversionService conversionService = MicaConversionService.getInstance();
	return conversionService.convert(source, targetType);
}
 

/**
 * Return a shared default application {@code ConversionService} instance, lazily
 * building it once needed.
 * <p>
 * Note: This method actually returns an {@link MicaConversionService}
 * instance. However, the {@code ConversionService} signature has been preserved for
 * binary compatibility.
 *
 * @return the shared {@code MicaConversionService} instance (never{@code null})
 */
public static GenericConversionService getInstance() {
	MicaConversionService sharedInstance = MicaConversionService.SHARED_INSTANCE;
	if (sharedInstance == null) {
		synchronized (MicaConversionService.class) {
			sharedInstance = MicaConversionService.SHARED_INSTANCE;
			if (sharedInstance == null) {
				sharedInstance = new MicaConversionService();
				MicaConversionService.SHARED_INSTANCE = sharedInstance;
			}
		}
	}
	return sharedInstance;
}
 

/**
 * 增加字符串转日期的功能
 */
@PostConstruct
public void initEditableValidation() {
    ConfigurableWebBindingInitializer initializer = (ConfigurableWebBindingInitializer) handlerAdapter
            .getWebBindingInitializer();
    if (initializer.getConversionService() != null) {
        GenericConversionService genericConversionService = (GenericConversionService) initializer
                .getConversionService();
        genericConversionService.addConverter(new DateConverter());
    }
}
 

@Test
public void customConversionServiceFailure() throws Exception {
	DefaultMessageHandlerMethodFactory instance = createInstance();
	GenericConversionService conversionService = new GenericConversionService();
	assertFalse("conversion service should fail to convert payload",
			conversionService.canConvert(Integer.class, String.class));
	instance.setConversionService(conversionService);
	instance.afterPropertiesSet();

	InvocableHandlerMethod invocableHandlerMethod =
			createInvocableHandlerMethod(instance, "simpleString", String.class);

	assertThatExceptionOfType(MessageConversionException.class).isThrownBy(() ->
			invocableHandlerMethod.invoke(MessageBuilder.withPayload(123).build()));
}
 

@Test
public void prototypeCreationReevaluatesExpressions() {
	GenericApplicationContext ac = new GenericApplicationContext();
	AnnotationConfigUtils.registerAnnotationConfigProcessors(ac);
	GenericConversionService cs = new GenericConversionService();
	cs.addConverter(String.class, String.class, String::trim);
	ac.getBeanFactory().registerSingleton(GenericApplicationContext.CONVERSION_SERVICE_BEAN_NAME, cs);
	RootBeanDefinition rbd = new RootBeanDefinition(PrototypeTestBean.class);
	rbd.setScope(RootBeanDefinition.SCOPE_PROTOTYPE);
	rbd.getPropertyValues().add("country", "#{systemProperties.country}");
	rbd.getPropertyValues().add("country2", new TypedStringValue("-#{systemProperties.country}-"));
	ac.registerBeanDefinition("test", rbd);
	ac.refresh();

	try {
		System.getProperties().put("name", "juergen1");
		System.getProperties().put("country", " UK1 ");
		PrototypeTestBean tb = (PrototypeTestBean) ac.getBean("test");
		assertEquals("juergen1", tb.getName());
		assertEquals("UK1", tb.getCountry());
		assertEquals("-UK1-", tb.getCountry2());

		System.getProperties().put("name", "juergen2");
		System.getProperties().put("country", "  UK2  ");
		tb = (PrototypeTestBean) ac.getBean("test");
		assertEquals("juergen2", tb.getName());
		assertEquals("UK2", tb.getCountry());
		assertEquals("-UK2-", tb.getCountry2());
	}
	finally {
		System.getProperties().remove("name");
		System.getProperties().remove("country");
	}
}
 

@Bean
public ConversionService webSocketConversionService() {
	GenericConversionService conversionService = new DefaultConversionService();
	conversionService.addConverter(new MyTypeToStringConverter());
	conversionService.addConverter(new MyTypeToBytesConverter());
	conversionService.addConverter(new StringToMyTypeConverter());
	conversionService.addConverter(new BytesToMyTypeConverter());
	return conversionService;
}
 

@Test
public void setPropertyIntermediateListIsNullWithBadConversionService() {
	Foo target = new Foo();
	AbstractPropertyAccessor accessor = createAccessor(target);
	accessor.setConversionService(new GenericConversionService() {
		@Override
		public Object convert(@Nullable Object source, @Nullable TypeDescriptor sourceType, TypeDescriptor targetType) {
			throw new ConversionFailedException(sourceType, targetType, source, null);
		}
	});
	accessor.setAutoGrowNestedPaths(true);
	accessor.setPropertyValue("listOfMaps[0]['luckyNumber']", "9");
	assertEquals("9", target.listOfMaps.get(0).get("luckyNumber"));
}
 

/**
 * 增加字符串转日期的功能
 */
@PostConstruct
public void initEditableValidation() {
	
    ConfigurableWebBindingInitializer initializer = (ConfigurableWebBindingInitializer) handlerAdapter
        .getWebBindingInitializer();
    if (initializer.getConversionService() != null) {
        GenericConversionService genericConversionService = (GenericConversionService) initializer
            .getConversionService();
        genericConversionService.addConverter(new StringToDateConverter());
    }

}
 

@PostConstruct
 public void initEditableValidation(){
    ConfigurableWebBindingInitializer initializer = (ConfigurableWebBindingInitializer) adapter.getWebBindingInitializer();
    if(initializer.getConversionService()!=null){
        GenericConversionService conversionService = (GenericConversionService) initializer.getConversionService();
        conversionService.addConverter(new StringToDateConverter());
    }
}
 

/**
 * Create a new {@link RelaxedConversionService} instance.
 *
 * @param conversionService and option root conversion service
 */
RelaxedConversionService(ConversionService conversionService){
    this.conversionService = conversionService;
    this.additionalConverters = new GenericConversionService();
    DefaultConversionService.addCollectionConverters(this.additionalConverters);
    this.additionalConverters
        .addConverterFactory(new RelaxedConversionService.StringToEnumIgnoringCaseConverterFactory());
    this.additionalConverters.addConverter(new StringToCharArrayConverter());
}
 

@Test
public void customConversionServiceFailure() throws Exception {
	DefaultMessageHandlerMethodFactory instance = createInstance();
	GenericConversionService conversionService = new GenericConversionService();
	assertFalse("conversion service should fail to convert payload",
			conversionService.canConvert(Integer.class, String.class));
	instance.setConversionService(conversionService);
	instance.afterPropertiesSet();

	InvocableHandlerMethod invocableHandlerMethod =
			createInvocableHandlerMethod(instance, "simpleString", String.class);

	thrown.expect(MessageConversionException.class);
	invocableHandlerMethod.invoke(MessageBuilder.withPayload(123).build());
}
 

@Test
public void prototypeCreationReevaluatesExpressions() {
	GenericApplicationContext ac = new GenericApplicationContext();
	AnnotationConfigUtils.registerAnnotationConfigProcessors(ac);
	GenericConversionService cs = new GenericConversionService();
	cs.addConverter(String.class, String.class, String::trim);
	ac.getBeanFactory().registerSingleton(GenericApplicationContext.CONVERSION_SERVICE_BEAN_NAME, cs);
	RootBeanDefinition rbd = new RootBeanDefinition(PrototypeTestBean.class);
	rbd.setScope(RootBeanDefinition.SCOPE_PROTOTYPE);
	rbd.getPropertyValues().add("country", "#{systemProperties.country}");
	rbd.getPropertyValues().add("country2", new TypedStringValue("-#{systemProperties.country}-"));
	ac.registerBeanDefinition("test", rbd);
	ac.refresh();

	try {
		System.getProperties().put("name", "juergen1");
		System.getProperties().put("country", " UK1 ");
		PrototypeTestBean tb = (PrototypeTestBean) ac.getBean("test");
		assertEquals("juergen1", tb.getName());
		assertEquals("UK1", tb.getCountry());
		assertEquals("-UK1-", tb.getCountry2());

		System.getProperties().put("name", "juergen2");
		System.getProperties().put("country", "  UK2  ");
		tb = (PrototypeTestBean) ac.getBean("test");
		assertEquals("juergen2", tb.getName());
		assertEquals("UK2", tb.getCountry());
		assertEquals("-UK2-", tb.getCountry2());
	}
	finally {
		System.getProperties().remove("name");
		System.getProperties().remove("country");
	}
}
 

@Test
public void test_binaryPlusWithTimeConverted() {

	final SimpleDateFormat format = new SimpleDateFormat("hh :--: mm :--: ss", Locale.ENGLISH);

	GenericConversionService conversionService = new GenericConversionService();
	conversionService.addConverter(new Converter<Time, String>() {
		@Override
		public String convert(Time source) {
			return format.format(source);
		}
	});

	StandardEvaluationContext evaluationContextConverter = new StandardEvaluationContext();
	evaluationContextConverter.setTypeConverter(new StandardTypeConverter(conversionService));

	ExpressionState expressionState = new ExpressionState(evaluationContextConverter);

	Time time = new Time(new Date().getTime());

	VariableReference var = new VariableReference("timeVar", -1);
	var.setValue(expressionState, time);

	StringLiteral n2 = new StringLiteral("\" is now\"", -1, "\" is now\"");
	OpPlus o = new OpPlus(-1, var, n2);
	TypedValue value = o.getValueInternal(expressionState);

	assertEquals(String.class, value.getTypeDescriptor().getObjectType());
	assertEquals(String.class, value.getTypeDescriptor().getType());
	assertEquals(format.format(time) + " is now", value.getValue());
}
 

@Bean
public ConversionService webSocketConversionService() {
	GenericConversionService conversionService = new DefaultConversionService();
	conversionService.addConverter(new MyTypeToStringConverter());
	conversionService.addConverter(new MyTypeToBytesConverter());
	conversionService.addConverter(new StringToMyTypeConverter());
	conversionService.addConverter(new BytesToMyTypeConverter());
	return conversionService;
}
 

@Test
public void setPropertyIntermediateListIsNullWithBadConversionService() {
	Foo target = new Foo();
	AbstractPropertyAccessor accessor = createAccessor(target);
	accessor.setConversionService(new GenericConversionService() {
		@Override
		public Object convert(@Nullable Object source, @Nullable TypeDescriptor sourceType, TypeDescriptor targetType) {
			throw new ConversionFailedException(sourceType, targetType, source, null);
		}
	});
	accessor.setAutoGrowNestedPaths(true);
	accessor.setPropertyValue("listOfMaps[0]['luckyNumber']", "9");
	assertEquals("9", target.listOfMaps.get(0).get("luckyNumber"));
}