Interface Navigator<T,C,F,M>

All Known Implementing Classes:
ApNavigator, NavigatorImpl

public interface Navigator<T,C,F,M>
Provides unified view of the underlying reflection library, such as java.lang.reflect and/or Annotation Processing.

This interface provides navigation over the reflection model to decouple the caller from any particular implementation. This allows the JAXB RI to reuse much of the code between the compile time (which works on top of Annotation Processing) and the run-time (which works on top of java.lang.reflect)

Navigator instances are stateless and immutable.

Parameterization

C

A Java class declaration (not an interface, a class and an enum.)

T

A Java type. This includs declaration, but also includes such things like arrays, primitive types, parameterized types, and etc.

Author:
Kohsuke Kawaguchi (kk@kohsuke.org)
  • Method Details

    • getSuperClass

      C getSuperClass(C clazz)
      Gets the base class of the specified class.
      Returns:
      null if the parameter represents Object.
    • getBaseClass

      T getBaseClass(T type, C baseType)
      Gets the parameterization of the given base type.

      For example, given the following

      
       interface Foo<T> extends List<List<T>> {}
       interface Bar extends Foo<String> {}
       
      This method works like this:
      
       getBaseClass( Bar, List ) = List<List<String>>
       getBaseClass( Bar, Foo  ) = Foo<String>
       getBaseClass( Foo<? extends Number>, Collection ) = Collection<List<? extends Number>>
       getBaseClass( ArrayList<? extends BigInteger>, List ) = List<? extends BigInteger>
       
      Parameters:
      type - The type that derives from baseType
      baseType - The class whose parameterization we are interested in.
      Returns:
      The use of baseType in type. or null if the type is not assignable to the base type.
    • getClassName

      String getClassName(C clazz)
      Gets the fully-qualified name of the class. ("java.lang.Object" for Object)
    • getTypeName

      String getTypeName(T rawType)
      Gets the display name of the type object
      Returns:
      a human-readable name that the type represents.
    • getClassShortName

      String getClassShortName(C clazz)
      Gets the short name of the class ("Object" for Object.) For nested classes, this method should just return the inner name. (for example "Inner" for "com.acme.Outer$Inner".
    • getDeclaredFields

      Collection<? extends F> getDeclaredFields(C clazz)
      Gets all the declared fields of the given class.
    • getDeclaredField

      F getDeclaredField(C clazz, String fieldName)
      Gets the named field declared on the given class. This method doesn't visit ancestors, but does recognize non-public fields.
      Returns:
      null if not found
    • getDeclaredMethods

      Collection<? extends M> getDeclaredMethods(C clazz)
      Gets all the declared methods of the given class (regardless of their access modifiers, regardless of whether they override methods of the base classes.)

      Note that this method does not list methods declared on base classes.

      Returns:
      can be empty but always non-null.
    • getDeclaringClassForField

      C getDeclaringClassForField(F field)
      Gets the class that declares the given field.
    • getDeclaringClassForMethod

      C getDeclaringClassForMethod(M method)
      Gets the class that declares the given method.
    • getFieldType

      T getFieldType(F f)
      Gets the type of the field.
    • getFieldName

      String getFieldName(F field)
      Gets the name of the field.
    • getMethodName

      String getMethodName(M m)
      Gets the name of the method, such as "toString" or "equals".
    • getReturnType

      T getReturnType(M m)
      Gets the return type of a method.
    • getMethodParameters

      T[] getMethodParameters(M method)
      Returns the list of parameters to the method.
    • isStaticMethod

      boolean isStaticMethod(M method)
      Returns true if the method is static.
    • isSubClassOf

      boolean isSubClassOf(T sub, T sup)
      Checks if sub is a sub-type of sup. TODO: should this method take T or C?
    • ref

      T ref(Class c)
      Gets the representation of the given Java type in T.
      Parameters:
      c - can be a primitive, array, class, or anything. (therefore the return type has to be T, not C)
    • use

      T use(C c)
      Gets the T for the given C.
    • asDecl

      C asDecl(T type)
      If the given type is an use of class declaration, returns the type casted as C. Otherwise null.

      TODO: define the exact semantics.

    • asDecl

      C asDecl(Class c)
      Gets the C representation for the given class. The behavior is undefined if the class object represents primitives, arrays, and other types that are not class declaration.
    • isArray

      boolean isArray(T t)
      Checks if the type is an array type.
    • isArrayButNotByteArray

      boolean isArrayButNotByteArray(T t)
      Checks if the type is an array type but not byte[].
    • getComponentType

      T getComponentType(T t)
      Gets the component type of the array.
      Parameters:
      t - must be an array.
    • getTypeArgument

      T getTypeArgument(T t, int i)
      Gets the i-th type argument from a parameterized type. For example, getTypeArgument([Map<Integer,String>],0)=Integer
      Throws:
      IllegalArgumentException - If t is not a parameterized type
      IndexOutOfBoundsException - If i is out of range.
      See Also:
    • isParameterizedType

      boolean isParameterizedType(T t)
      Returns true if t is a parameterized type.
    • isPrimitive

      boolean isPrimitive(T t)
      Checks if the given type is a primitive type.
    • getPrimitive

      T getPrimitive(Class primitiveType)
      Returns the representation for the given primitive type.
      Parameters:
      primitiveType - must be Class objects like Integer.TYPE.
    • getClassLocation

      Location getClassLocation(C clazz)
      Returns a location of the specified class.
    • getFieldLocation

      Location getFieldLocation(F field)
    • getMethodLocation

      Location getMethodLocation(M getter)
    • hasDefaultConstructor

      boolean hasDefaultConstructor(C clazz)
      Returns true if the given class has a no-arg default constructor. The constructor does not need to be public.
    • isStaticField

      boolean isStaticField(F field)
      Returns true if the field is static.
    • isPublicMethod

      boolean isPublicMethod(M method)
      Returns true if the method is public.
    • isFinalMethod

      boolean isFinalMethod(M method)
      Returns true if the method is final.
    • isPublicField

      boolean isPublicField(F field)
      Returns true if the field is public.
    • isEnum

      boolean isEnum(C clazz)
      Returns true if this is an enum class.
    • erasure

      <P> T erasure(T contentInMemoryType)
      Computes the erasure
    • isAbstract

      boolean isAbstract(C clazz)
      Returns true if this is an abstract class.
    • isFinal

      boolean isFinal(C clazz)
      Returns true if this is a final class.
    • getEnumConstants

      F[] getEnumConstants(C clazz)
      Gets the enumeration constants from an enum class.
      Parameters:
      clazz - must derive from Enum.
      Returns:
      can be empty but never null.
    • getVoidType

      T getVoidType()
      Gets the representation of the primitive "void" type.
    • getPackageName

      String getPackageName(C clazz)
      Gets the package name of the given class.
      Returns:
      i.e. "", "java.lang" but not null.
    • loadObjectFactory

      C loadObjectFactory(C referencePoint, String packageName)
      Finds ObjectFactory for the given referencePoint.
      Parameters:
      referencePoint - The class that refers to the specified class.
      Returns:
      null if not found.
    • isBridgeMethod

      boolean isBridgeMethod(M method)
      Returns true if this method is a bridge method as defined in JLS.
    • isOverriding

      boolean isOverriding(M method, C base)
      Returns true if the given method is overriding another one defined in the base class 'base' or its ancestors.
    • isInterface

      boolean isInterface(C clazz)
      Returns true if 'clazz' is an interface.
    • isTransient

      boolean isTransient(F f)
      Returns true if the field is transient.
    • isInnerClass

      boolean isInnerClass(C clazz)
      Returns true if the given class is an inner class. This is only used to improve the error diagnostics, so it's OK to fail to detect some inner classes as such. Note that this method should return false for nested classes (static classes.)
    • isSameType

      boolean isSameType(T t1, T t2)
      Checks if types are the same
      Parameters:
      t1 - type
      t2 - type
      Returns:
      true if types are the same