org.springframework.core.ResolvableType类的使用及代码示例
本文整理了Java中org.springframework.core.ResolvableType类的一些代码示例，展示了ResolvableType类的具体用法。这些代码示例主要来源于Github/Stackoverflow/Maven等平台，是从一些精选项目中提取出来的代码，具有较强的参考意义，能在一定程度帮忙到你。ResolvableType类的具体详情如下：
包路径：org.springframework.core.ResolvableType
类名称：ResolvableType
ResolvableType介绍
[英]Encapsulates a Java java.lang.reflect.Type, providing access to #getSuperType(), #getInterfaces(), and #getGeneric(int...) along with the ability to ultimately #resolve() to a java.lang.Class.
ResolvableTypes may be obtained from #forField(Field), #forMethodParameter(Method,int), #forMethodReturnType(Method) or #forClass(Class). Most methods on this class will themselves return ResolvableType, allowing easy navigation. For example:
private HashMap<Integer, List<String>> myMap;
public void example() {
ResolvableType t = ResolvableType.forField(getClass().getDeclaredField("myMap"));
t.getSuperType(); // AbstractMap<Integer, List<String>>
t.asMap(); // Map<Integer, List<String>>
t.getGeneric(0).resolve(); // Integer
t.getGeneric(1).resolve(); // List
t.getGeneric(1); // List<String>
t.resolveGeneric(1, 0); // String
}[中]封装Java。朗，反思一下。类型，提供对#getSuperType（）、#getInterfaces（）和#getGeneric（int…）的访问以及最终#解析（）到java的能力。朗，同学们。
可解析类型可从#forField（字段）、#FormMethodParameter（方法，int）、#FormMethodReturnType（方法）或#forClass（类）中获取。这个类上的大多数方法本身都将返回ResolvableType，从而允许轻松导航。例如：
private HashMap<Integer, List<String>> myMap;
public void example() {
ResolvableType t = ResolvableType.forField(getClass().getDeclaredField("myMap"));
t.getSuperType(); // AbstractMap<Integer, List<String>>
t.asMap(); // Map<Integer, List<String>>
t.getGeneric(0).resolve(); // Integer
t.getGeneric(1).resolve(); // List
t.getGeneric(1); // List<String>
t.resolveGeneric(1, 0); // String
}代码示例
代码示例来源：origin: spring-projects/spring-framework
/**
* Constructor with a fully initialized {@link HttpMessageWriter}.
*/
public HttpMessageWriterView(HttpMessageWriter<?> writer) {
Assert.notNull(writer, "HttpMessageWriter is required");
this.writer = writer;
this.canWriteMap = writer.canWrite(ResolvableType.forClass(Map.class), null);
}代码示例来源：origin: spring-projects/spring-framework
@Nullable
private static Class<?> getSingleGeneric(ResolvableType resolvableType) {
Assert.isTrue(resolvableType.getGenerics().length == 1,
() -> "Expected 1 type argument on generic interface [" + resolvableType +
"] but found " + resolvableType.getGenerics().length);
return resolvableType.getGeneric().resolve();
}代码示例来源：origin: spring-projects/spring-framework
/**
* Return a {@link ResolvableType} for the specified {@link Constructor} parameter.
* @param constructor the source constructor (must not be {@code null})
* @param parameterIndex the parameter index
* @return a {@link ResolvableType} for the specified constructor parameter
* @see #forConstructorParameter(Constructor, int, Class)
*/
public static ResolvableType forConstructorParameter(Constructor<?> constructor, int parameterIndex) {
Assert.notNull(constructor, "Constructor must not be null");
return forMethodParameter(new MethodParameter(constructor, parameterIndex));
}代码示例来源：origin: spring-projects/spring-framework
/**
* Determine whether this {@code ResolvableType} is assignable from the
* specified other type.
* @param other the type to be checked against (as a {@code Class})
* @since 4.2
* @see #isAssignableFrom(ResolvableType)
*/
public boolean isAssignableFrom(Class<?> other) {
return isAssignableFrom(forClass(other), null);
}代码示例来源：origin: spring-projects/spring-framework
private Class<?> getPayloadType(MethodParameter parameter) {
Type genericParamType = parameter.getGenericParameterType();
ResolvableType resolvableType = ResolvableType.forType(genericParamType).as(Message.class);
return resolvableType.getGeneric().toClass();
}代码示例来源：origin: spring-projects/spring-framework
/**
* Return a {@link ResolvableType} for the specified {@link MethodParameter},
* overriding the target type to resolve with a specific given type.
* @param methodParameter the source method parameter (must not be {@code null})
* @param targetType the type to resolve (a part of the method parameter's type)
* @return a {@link ResolvableType} for the specified method parameter
* @see #forMethodParameter(Method, int)
*/
public static ResolvableType forMethodParameter(MethodParameter methodParameter, @Nullable Type targetType) {
Assert.notNull(methodParameter, "MethodParameter must not be null");
ResolvableType owner = forType(methodParameter.getContainingClass()).as(methodParameter.getDeclaringClass());
return forType(targetType, new MethodParameterTypeProvider(methodParameter), owner.asVariableResolver()).
getNested(methodParameter.getNestingLevel(), methodParameter.typeIndexesPerLevel);
}代码示例来源：origin: spring-projects/spring-framework
/**
* Resolve the top-level parameter type of the given {@code MethodParameter}.
* @param methodParameter the method parameter to resolve
* @since 4.1.9
* @see MethodParameter#setParameterType
*/
static void resolveMethodParameter(MethodParameter methodParameter) {
Assert.notNull(methodParameter, "MethodParameter must not be null");
ResolvableType owner = forType(methodParameter.getContainingClass()).as(methodParameter.getDeclaringClass());
methodParameter.setParameterType(
forType(null, new MethodParameterTypeProvider(methodParameter), owner.asVariableResolver()).resolve());
}代码示例来源：origin: spring-projects/spring-framework
/**
* Return a {@link ResolvableType} for the specified {@link Method} return type.
* Use this variant when the class that declares the method includes generic
* parameter variables that are satisfied by the implementation class.
* @param method the source for the method return type
* @param implementationClass the implementation class
* @return a {@link ResolvableType} for the specified method return
* @see #forMethodReturnType(Method)
*/
public static ResolvableType forMethodReturnType(Method method, Class<?> implementationClass) {
Assert.notNull(method, "Method must not be null");
MethodParameter methodParameter = new MethodParameter(method, -1);
methodParameter.setContainingClass(implementationClass);
return forMethodParameter(methodParameter);
}代码示例来源：origin: spring-projects/spring-framework
/**
* Determine the target type for the generic return type of the given method,
* where formal type variables are declared on the given class.
* @param method the method to introspect
* @param clazz the class to resolve type variables against
* @return the corresponding generic parameter or return type
*/
public static Class<?> resolveReturnType(Method method, Class<?> clazz) {
Assert.notNull(method, "Method must not be null");
Assert.notNull(clazz, "Class must not be null");
return ResolvableType.forMethodReturnType(method, clazz).resolve(method.getReturnType());
}代码示例来源：origin: spring-projects/spring-framework
/**
* Return a {@link ResolvableType} as a array of the specified {@code componentType}.
* @param componentType the component type
* @return a {@link ResolvableType} as an array of the specified component type
*/
public static ResolvableType forArrayComponent(ResolvableType componentType) {
Assert.notNull(componentType, "Component type must not be null");
Class<?> arrayClass = Array.newInstance(componentType.resolve(), 0).getClass();
return new ResolvableType(arrayClass, null, null, componentType);
}代码示例来源：origin: spring-projects/spring-framework
/**
* Return a {@link ResolvableType} for the specified {@link Field} with the
* given nesting level.
* @param field the source field
* @param nestingLevel the nesting level (1 for the outer level; 2 for a nested
* generic type; etc)
* @see #forField(Field)
*/
public static ResolvableType forField(Field field, int nestingLevel) {
Assert.notNull(field, "Field must not be null");
return forType(null, new FieldTypeProvider(field), null).getNested(nestingLevel);
}代码示例来源：origin: spring-projects/spring-framework
/**
* Return a {@link ResolvableType} for the specified {@link Field}.
* @param field the source field
* @return a {@link ResolvableType} for the specified field
* @see #forField(Field, Class)
*/
public static ResolvableType forField(Field field) {
Assert.notNull(field, "Field must not be null");
return forType(null, new FieldTypeProvider(field), null);
}代码示例来源：origin: spring-projects/spring-framework
/**
* Create a new type descriptor from a {@link Property}.
* <p>Use this constructor when a source or target conversion point is a
* property on a Java class.
* @param property the property
*/
public TypeDescriptor(Property property) {
Assert.notNull(property, "Property must not be null");
this.resolvableType = ResolvableType.forMethodParameter(property.getMethodParameter());
this.type = this.resolvableType.resolve(property.getType());
this.annotatedElement = new AnnotatedElementAdapter(property.getAnnotations());
}代码示例来源：origin: spring-projects/spring-framework
/**
* If this type is a {@link Map} and its key type is parameterized,
* returns the map's key type. If the Map's key type is not parameterized,
* returns {@code null} indicating the key type is not declared.
* @return the Map key type, or {@code null} if this type is a Map
* but its key type is not parameterized
* @throws IllegalStateException if this type is not a {@code java.util.Map}
*/
@Nullable
public TypeDescriptor getMapKeyTypeDescriptor() {
Assert.state(isMap(), "Not a [java.util.Map]");
return getRelatedIfResolvable(this, getResolvableType().asMap().getGeneric(0));
}代码示例来源：origin: spring-projects/spring-framework
@Nullable
static ResolvableType resolveDeclaredEventType(Class<?> listenerType) {
ResolvableType eventType = eventTypeCache.get(listenerType);
if (eventType == null) {
eventType = ResolvableType.forClass(listenerType).as(ApplicationListener.class).getGeneric();
eventTypeCache.put(listenerType, eventType);
}
return (eventType != ResolvableType.NONE ? eventType : null);
}代码示例来源：origin: spring-projects/spring-framework
@Override
public boolean supportsReturnType(MethodParameter returnType) {
if (StreamingResponseBody.class.isAssignableFrom(returnType.getParameterType())) {
return true;
}
else if (ResponseEntity.class.isAssignableFrom(returnType.getParameterType())) {
Class<?> bodyType = ResolvableType.forMethodParameter(returnType).getGeneric().resolve();
return (bodyType != null && StreamingResponseBody.class.isAssignableFrom(bodyType));
}
return false;
}代码示例来源：origin: spring-projects/spring-framework
@Nullable
private static Class<?> getCollectionParameterType(MethodParameter methodParam) {
Class<?> paramType = methodParam.getNestedParameterType();
if (Collection.class == paramType || List.class.isAssignableFrom(paramType)){
Class<?> valueType = ResolvableType.forMethodParameter(methodParam).asCollection().resolveGeneric();
if (valueType != null) {
return valueType;
}
}
return null;
}代码示例来源：origin: spring-projects/spring-framework
/**
* Return the generic type of the {@code returnType} (or of the nested type
* if it is an {@link HttpEntity}).
*/
private Type getGenericType(MethodParameter returnType) {
if (HttpEntity.class.isAssignableFrom(returnType.getParameterType())) {
return ResolvableType.forType(returnType.getGenericParameterType()).getGeneric().getType();
}
else {
return returnType.getGenericParameterType();
}
}代码示例来源：origin: spring-projects/spring-framework
/**
* Return a {@link ResolvableType} for the specified {@link Type}.
* <p>Note: The resulting {@link ResolvableType} instance may not be {@link Serializable}.
* @param type the source type (potentially {@code null})
* @return a {@link ResolvableType} for the specified {@link Type}
* @see #forType(Type, ResolvableType)
*/
public static ResolvableType forType(@Nullable Type type) {
return forType(type, null, null);
}代码示例来源：origin: spring-projects/spring-framework
/**
* Determine whether the given object is an instance of this {@code ResolvableType}.
* @param obj the object to check
* @since 4.2
* @see #isAssignableFrom(Class)
*/
public boolean isInstance(@Nullable Object obj) {
return (obj != null && isAssignableFrom(obj.getClass()));
}内容来源于网络，如有侵权，请联系作者删除！
