Java AttributeConverter類代碼示例

import javax.persistence.AttributeConverter; //導入依賴的package包/類
@Override
public void setExpectedType(Type expectedType) {
	if ( this.expectedType != null ) {
		return;
	}

	if ( AttributeConverterTypeAdapter.class.isInstance( expectedType ) ) {
		final AttributeConverterTypeAdapter adapterType = (AttributeConverterTypeAdapter) expectedType;
		if ( getDataType().getReturnedClass().equals( adapterType.getModelType() ) ) {
			// apply the converter
			final AttributeConverter converter = ( (AttributeConverterTypeAdapter) expectedType ).getAttributeConverter();
			final Object converted = converter.convertToDatabaseColumn( getLiteralValue() );
			if ( isCharacterData( adapterType.sqlType() ) ) {
				setText( "'" + converted.toString() + "'" );
			}
			else {
				setText( converted.toString() );
			}
		}
		this.expectedType = expectedType;
	}
}
 

import javax.persistence.AttributeConverter; //導入依賴的package包/類
@SuppressWarnings("unchecked")
private AttributeConverter<Object, Object> getConverter(AccessibleObject accessible) {
	Convert converter = accessible.getAnnotation(Convert.class);
	if (converter != null) {
		Class<?> converterClass = converter.converter();
		if (!AttributeConverter.class.isAssignableFrom(converterClass)) {
			throw new RuntimeException(
					"Converter class must be AttributeConverter rather than " + converterClass.getName());
		}
		try {
			Constructor<?> cs = converterClass.getDeclaredConstructor();
			cs.setAccessible(true);
			return (AttributeConverter<Object, Object>) cs.newInstance();
		} catch (InstantiationException | IllegalAccessException | NoSuchMethodException | SecurityException
				| InvocationTargetException e) {
			throw new RuntimeException("Cannot instantiate Converter: " + converterClass.getName(), e);
		}
	}
	return null;
}
 

import javax.persistence.AttributeConverter; //導入依賴的package包/類
private static Class<?> getConverterType(AttributeConverter<Object, Object> converter) {
	if (converter != null) {
		List<Type> types = ClassUtils.getGenericInterfacesIncludeHierarchy(converter.getClass());
		for (Type type : types) {
			if (type instanceof ParameterizedType) {
				ParameterizedType pt = (ParameterizedType) type;
				if (pt.getRawType() == AttributeConverter.class) {
					Type dbType = pt.getActualTypeArguments()[1];
					if (dbType instanceof Class) {
						return (Class<?>) dbType;
					}
				}
			}

		}
	}
	return null;
}
 

import javax.persistence.AttributeConverter; //導入依賴的package包/類
Where<T> append(String type, String clause, Object... params) {
	// check clause:
	Mapper<T> mapper = this.criteria.mapper;
	CompiledClause cc = CompiledClause.compile(mapper, clause);
	if (cc.converters.length != params.length) {
		throw new IllegalArgumentException("Arguments not match the placeholder.");
	}
	// convert params:
	int n = 0;
	for (AttributeConverter<Object, Object> converter : cc.converters) {
		if (converter != null) {
			params[n] = converter.convertToDatabaseColumn(params[n]);
		}
		n++;
	}
	// add:
	if (type != null) {
		this.criteria.where.add(type);
	}
	this.criteria.where.add(cc.clause);
	for (Object param : params) {
		this.criteria.whereParams.add(param);
	}
	return this;
}
 

import javax.persistence.AttributeConverter; //導入依賴的package包/類
private void createConverterClass(Converter convert, ClassLoader classLoader) {
        //create Java Class
        Class<?> attributeConverter = new ByteBuddy()
//                .subclass(TypeDescription.Generic.Builder.parameterizedType(AttributeConverter.class, String.class, Integer.class).build())
                .subclass(AttributeConverter.class)
                .name(convert.getClazz())
                .annotateType(AnnotationDescription.Builder.ofType(javax.persistence.Converter.class).build())
                .make()
                .load(classLoader, ClassLoadingStrategy.Default.INJECTION)
                .getLoaded();

        //create MetadataClass
        MetadataClass metadataClass = new MetadataClass(getMetadataFactory(), convert.getClazz());
        metadataClass.addInterface(AttributeConverter.class.getName());
        metadataClass.addGenericType("");
        metadataClass.addGenericType("");
        metadataClass.addGenericType(convert.getAttributeType());
        metadataClass.addGenericType("");
        metadataClass.addGenericType(convert.getFieldType());
        getMetadataFactory().addMetadataClass(metadataClass);

    }
 

import javax.persistence.AttributeConverter; //導入依賴的package包/類
private AttributeConverter instantiateAttributeConverter(Class<? extends AttributeConverter> attributeConverterClass) {
	AttributeConverter attributeConverter;
	try {
		attributeConverter = attributeConverterClass.newInstance();
	}
	catch (Exception e) {
		throw new AnnotationException(
				"Unable to instantiate AttributeConverter [" + attributeConverterClass.getName() + "]",
				e
		);
	}
	return attributeConverter;
}
 

import javax.persistence.AttributeConverter; //導入依賴的package包/類
/**
 * Adds the AttributeConverter instance to this Configuration.  This form is mainly intended for developers
 * to programatically add their own AttributeConverter instance.  HEM, instead, uses the
 * {@link #addAttributeConverter(Class, boolean)} form
 *
 * @param attributeConverter The AttributeConverter instance.
 */
public void addAttributeConverter(AttributeConverter attributeConverter) {
	boolean autoApply = false;
	Converter converterAnnotation = attributeConverter.getClass().getAnnotation( Converter.class );
	if ( converterAnnotation != null ) {
		autoApply = converterAnnotation.autoApply();
	}

	addAttributeConverter( new AttributeConverterDefinition( attributeConverter, autoApply ) );
}
 

import javax.persistence.AttributeConverter; //導入依賴的package包/類
public AttributeConversionInfo(
		Class<? extends AttributeConverter> converterClass,
		boolean conversionDisabled,
		String attributeName,
		XAnnotatedElement source) {
	this.converterClass = converterClass;
	this.conversionDisabled = conversionDisabled;
	this.attributeName = attributeName;
	this.source = source;
}
 

import javax.persistence.AttributeConverter; //導入依賴的package包/類
public AttributeConverterDefinition(AttributeConverter attributeConverter, boolean autoApply) {
	this.attributeConverter = attributeConverter;
	this.autoApply = autoApply;

	final Class attributeConverterClass = attributeConverter.getClass();
	final ParameterizedType attributeConverterSignature = extractAttributeConverterParameterizedType( attributeConverterClass );

	if ( attributeConverterSignature.getActualTypeArguments().length < 2 ) {
		throw new AnnotationException(
				"AttributeConverter [" + attributeConverterClass.getName()
						+ "] did not retain parameterized type information"
		);
	}

	if ( attributeConverterSignature.getActualTypeArguments().length > 2 ) {
		throw new AnnotationException(
				"AttributeConverter [" + attributeConverterClass.getName()
						+ "] specified more than 2 parameterized types"
		);
	}
	entityAttributeType = (Class) attributeConverterSignature.getActualTypeArguments()[0];
	if ( entityAttributeType == null ) {
		throw new AnnotationException(
				"Could not determine 'entity attribute' type from given AttributeConverter [" +
						attributeConverterClass.getName() + "]"
		);
	}

	databaseColumnType = (Class) attributeConverterSignature.getActualTypeArguments()[1];
	if ( databaseColumnType == null ) {
		throw new AnnotationException(
				"Could not determine 'database column' type from given AttributeConverter [" +
						attributeConverterClass.getName() + "]"
		);
	}
}
 

import javax.persistence.AttributeConverter; //導入依賴的package包/類
private ParameterizedType extractAttributeConverterParameterizedType(Class attributeConverterClass) {
	for ( Type type : attributeConverterClass.getGenericInterfaces() ) {
		if ( ParameterizedType.class.isInstance( type ) ) {
			final ParameterizedType parameterizedType = (ParameterizedType) type;
			if ( AttributeConverter.class.equals( parameterizedType.getRawType() ) ) {
				return parameterizedType;
			}
		}
	}

	throw new AssertionFailure(
			"Could not extract ParameterizedType representation of AttributeConverter definition " +
					"from AttributeConverter implementation class [" + attributeConverterClass.getName() + "]"
	);
}
 

import javax.persistence.AttributeConverter; //導入依賴的package包/類
public AttributeConverterTypeAdapter(
		String name,
		AttributeConverter<? extends T,?> attributeConverter,
		SqlTypeDescriptor sqlTypeDescriptorAdapter,
		Class modelType,
		Class jdbcType,
		JavaTypeDescriptor<T> entityAttributeJavaTypeDescriptor) {
	super( sqlTypeDescriptorAdapter, entityAttributeJavaTypeDescriptor );
	this.name = name;
	this.modelType = modelType;
	this.jdbcType = jdbcType;
	this.attributeConverter = attributeConverter;

	log.debug( "Created AttributeConverterTypeAdapter -> " + name );
}
 

import javax.persistence.AttributeConverter; //導入依賴的package包/類
public AttributeConverterSqlTypeDescriptorAdapter(
		AttributeConverter converter,
		SqlTypeDescriptor delegate,
		JavaTypeDescriptor intermediateJavaTypeDescriptor) {
	this.converter = converter;
	this.delegate = delegate;
	this.intermediateJavaTypeDescriptor = intermediateJavaTypeDescriptor;
}
 

import javax.persistence.AttributeConverter; //導入依賴的package包/類
private static Class<?> checkPropertyType(Class<?> typeClass, AttributeConverter<Object, Object> converter) {
	Class<?> converterType = getConverterType(converter);
	if (converterType != null) {
		typeClass = converterType;
	}
	if (typeClass.isEnum() || DEFAULT_COLUMN_TYPES.containsKey(typeClass)) {
		return typeClass;
	}
	throw new RuntimeException("Unsupported type: " + typeClass);
}
 

import javax.persistence.AttributeConverter; //導入依賴的package包/類
@SuppressWarnings("unchecked")
static CompiledClause doCompile(Mapper<?> mapper, String clause) {
	Map<String, AccessibleProperty> properties = mapper.allPropertiesMap;
	StringBuilder sb = new StringBuilder(clause.length() + 10);
	List<AttributeConverter<Object, Object>> list = new ArrayList<>();
	int start = 0;
	Matcher m = p.matcher(clause.toLowerCase());
	while (m.find()) {
		sb.append(clause.substring(start, m.start()));
		String s = clause.substring(m.start(), m.end());
		if (properties.containsKey(s.toLowerCase())) {
			AccessibleProperty ap = properties.get(s.toLowerCase());
			sb.append(ap.columnName);
			list.add(ap.converter);
		} else {
			if (s.toLowerCase().equals("between")) {
				list.add(list.get(list.size() - 1));
			} else if (s.toLowerCase().equals("null")) {
				list.remove(list.size() - 1);
			} else {
				if (!KEYWORDS.contains(s.toLowerCase())) {
					throw new IllegalArgumentException("Invalid string \"" + s + "\" found in clause: " + clause);
				}
			}
			sb.append(s);
		}
		start = m.end();
	}
	sb.append(clause.substring(start));
	if (list.size() != numOfPlaceholder(clause)) {
		throw new IllegalArgumentException("Invalid number of placeholder.");
	}
	return new CompiledClause(sb.toString(), list.toArray(new AttributeConverter[0]));
}
 

import javax.persistence.AttributeConverter; //導入依賴的package包/類
public SingularAttributeBasic(
		ManagedTypeImplementor declaringType,
		String name,
		PropertyAccess propertyAccess,
		BasicType ormType,
		Disposition disposition,
		AttributeConverter attributeConverter,
		List<Column> columns) {
	super( declaringType, name, propertyAccess, ormType, disposition, true );
	this.attributeConverter = attributeConverter;
	this.columns = columns;
}