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package com.sun.xml.bind.v2.model.annotation;
import java.lang.annotation.Annotation;
import java.lang.reflect.Field;
import java.lang.reflect.Method;
import com.sun.istack.Nullable;
import com.sun.xml.bind.v2.model.core.ErrorHandler;
/**
* Reads annotations for the given property.
*
* <p>
* This is the lowest abstraction that encapsulates the difference
* between reading inline annotations and external binding files.
*
* <p>
* Because the former operates on a {@link Field} and {@link Method}
* while the latter operates on a "property", the methods defined
* on this interface takes both, and the callee gets to choose which
* to use.
*
* <p>
* Most of the get method takes {@link Locatable}, which points to
* the place/context in which the annotation is read. The returned
* annotation also implements {@link Locatable} (so that it can
* point to the place where the annotation is placed), and its
* {@link Locatable#getUpstream()} will return the given
* {@link Locatable}.
*
*
* <p>
* Errors found during reading annotations are reported through the error handler.
* A valid {@link ErrorHandler} must be registered before the {@link AnnotationReader}
* is used.
*
* @author Kohsuke Kawaguchi (kk@kohsuke.org)
*/
public interface AnnotationReader<T,C,F,M> {
/**
* Sets the error handler that receives errors found
* during reading annotations.
*
* @param errorHandler
* must not be null.
*/
void setErrorHandler(ErrorHandler errorHandler);
/**
* Reads an annotation on a property that consists of a field.
*/
<A extends Annotation> A getFieldAnnotation(Class<A> annotation,
F field, Locatable srcpos);
/**
* Checks if the given field has an annotation.
*/
boolean hasFieldAnnotation(Class<? extends Annotation> annotationType, F field);
/**
* Checks if a class has the annotation.
*/
boolean hasClassAnnotation(C clazz, Class<? extends Annotation> annotationType);
/**
* Gets all the annotations on a field.
*/
Annotation[] getAllFieldAnnotations(F field, Locatable srcPos);
/**
* Reads an annotation on a property that consists of a getter and a setter.
*
*/
<A extends Annotation> A getMethodAnnotation(Class<A> annotation,
M getter, M setter, Locatable srcpos);
/**
* Checks if the given method has an annotation.
*/
boolean hasMethodAnnotation(Class<? extends Annotation> annotation, String propertyName, M getter, M setter, Locatable srcPos);
/**
* Gets all the annotations on a method.
*
* @param srcPos
* the location from which this annotation is read.
*/
Annotation[] getAllMethodAnnotations(M method, Locatable srcPos);
// TODO: we do need this to read certain annotations,
// but that shows inconsistency wrt the spec. consult the spec team about the abstraction.
<A extends Annotation> A getMethodAnnotation(Class<A> annotation, M method, Locatable srcpos );
boolean hasMethodAnnotation(Class<? extends Annotation> annotation, M method );
/**
* Reads an annotation on a parameter of the method.
*
* @return null
* if the annotation was not found.
*/
@Nullable
<A extends Annotation> A getMethodParameterAnnotation(
Class<A> annotation, M method, int paramIndex, Locatable srcPos );
/**
* Reads an annotation on a class.
*/
@Nullable
<A extends Annotation> A getClassAnnotation(Class<A> annotation, C clazz, Locatable srcpos) ;
/**
* Reads an annotation on the package that the given class belongs to.
*/
@Nullable
<A extends Annotation> A getPackageAnnotation(Class<A> annotation, C clazz, Locatable srcpos);
/**
* Reads a value of an annotation that returns a Class object.
*
* <p>
* Depending on the underlying reflection library, you can't always
* obtain the {@link Class} object directly (see the Annotation Processing MirrorTypeException
* for example), so use this method to avoid that.
*
* @param name
* The name of the annotation parameter to be read.
*/
T getClassValue( Annotation a, String name );
/**
* Similar to {@link #getClassValue(Annotation, String)} method but
* obtains an array parameter.
*/
T[] getClassArrayValue( Annotation a, String name );
}