repository.grepcode.com$java$root@jdk$openjdk@6-b14
repository.grepcode.com$java$root@jdk$openjdk@6-b14@java$lang$reflect$AnnotatedElement.java
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Consider this code:
public example(String s, int i, @Foo Bar bar) {
/* ... */
}
I want to check if the method has an annotation @Foo and get the argument or throw an exception if no @Foo annotation is found.
My current approach is to first get the current method and then iterate through the parameter annotations:
import java.lang.annotation.Annotation;
import java.lang.reflect.Method;
c...
this is my code:
@Column(columnName="firstname")
private String firstName;
@Column(columnName="lastname")
private String lastName;
public String getFirstName() {
return firstName;
}
public void setFirstName(String firstName) {
this.firstName = firstName;
}
public String getLastName() {
return lastName;
}
public void setLastName(String lastName) {
this.lastName = lastNam...
How are annotations in Spring Framework realized? Are they realized by using Dependency Injection or Aspect Oriented Programming?
I thought they use AOP, well, because something annotated will do something which is specified somewhere else. On the other hand, something like @Autowired @Qualifier("beanID") IS Dependency Injection - well, maybe Annotations are based on AOP and can realize Depede...
package java.lang.reflect;
Represents an annotated element of the program currently running in this
VM. This interface allows annotations to be read reflectively. All
annotations returned by methods in this interface are immutable and
serializable. It is permissible for the caller to modify the
arrays returned by accessors for array-valued enum members; it will
have no affect on the arrays returned to other callers.
If an annotation returned by a method in this interface contains
(directly or indirectly) a java.lang.Classjava.lang.TypeNotPresentException
Similarly, attempting to read an enum-valued member will result in
a java.lang.EnumConstantNotPresentException
Finally, Attempting to read a member whose definition has evolved
incompatibly will result in a java.lang.annotation.AnnotationTypeMismatchExceptionjava.lang.annotation.IncompleteAnnotationException
- Author(s):
- Josh Bloch
- Since:
- 1.5
Returns true if an annotation for the specified type
is present on this element, else false. This method
is designed primarily for convenient access to marker annotations.
- Parameters:
annotationClass the Class object corresponding to the
annotation type- Returns:
- true if an annotation for the specified annotation
type is present on this element, else false
- Throws:
java.lang.NullPointerException if the given annotation class is null- Since:
- 1.5
Returns this element's annotation for the specified type if
such an annotation is present, else null.
- Parameters:
annotationClass the Class object corresponding to the
annotation type- Returns:
- this element's annotation for the specified annotation type if
present on this element, else null
- Throws:
java.lang.NullPointerException if the given annotation class is null- Since:
- 1.5
Returns all annotations present on this element. (Returns an array
of length zero if this element has no annotations.) The caller of
this method is free to modify the returned array; it will have no
effect on the arrays returned to other callers.
- Returns:
- all annotations present on this element
- Since:
- 1.5
Returns all annotations that are directly present on this
element. Unlike the other methods in this interface, this method
ignores inherited annotations. (Returns an array of length zero if
no annotations are directly present on this element.) The caller of
this method is free to modify the returned array; it will have no
effect on the arrays returned to other callers.
- Returns:
- All annotations directly present on this element
- Since:
- 1.5
