com.fitbur.bytebuddy.description.annotation.AnnotationList Maven / Gradle / Ivy
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package com.fitbur.bytebuddy.description.annotation;
import com.fitbur.bytebuddy.description.type.TypeDescription;
import com.fitbur.bytebuddy.description.type.TypeList;
import com.fitbur.bytebuddy.matcher.ElementMatcher;
import com.fitbur.bytebuddy.matcher.FilterableList;
import java.lang.annotation.Annotation;
import java.lang.annotation.RetentionPolicy;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.List;
import java.util.Set;
/**
* Defines a list of annotation instances.
*/
public interface AnnotationList extends FilterableList {
/**
* Checks if this list contains an annotation of the given type.
*
* @param annotationType The type to find in the list.
* @return {@code true} if the list contains the annotation type.
*/
boolean isAnnotationPresent(Class annotationType);
/**
* Checks if this list contains an annotation of the given type.
*
* @param annotationType The type to find in the list.
* @return {@code true} if the list contains the annotation type.
*/
boolean isAnnotationPresent(TypeDescription annotationType);
/**
* Finds the first annotation of the given type and returns it.
*
* @param annotationType The type to be found in the list.
* @param The annotation type.
* @return The annotation value or {@code null} if no such annotation was found.
*/
AnnotationDescription.Loadable ofType(Class annotationType);
/**
* Returns only annotations that are marked as {@link java.lang.annotation.Inherited} as long as they are not
* contained by the set of ignored annotation types.
*
* @param ignoredTypes A list of annotation types to be ignored from the lookup.
* @return A list of all inherited annotations besides of the given ignored types.
*/
AnnotationList inherited(Set ignoredTypes);
/**
* Only retains annotations with the given retention policy.
*
* @param matcher A matcher for the required retention policy.
* @return A of annotations only with elements
*/
AnnotationList visibility(ElementMatcher matcher);
/**
* Returns a list of the annotation types of this list.
*
* @return A list of the annotation types of this list.
*/
TypeList asTypeList();
/**
* An abstract base implementation of an annotation list.
*/
abstract class AbstractBase extends FilterableList.AbstractBase implements AnnotationList {
@Override
public boolean isAnnotationPresent(Class annotationType) {
for (AnnotationDescription annotation : this) {
if (annotation.getAnnotationType().represents(annotationType)) {
return true;
}
}
return false;
}
@Override
public boolean isAnnotationPresent(TypeDescription annotationType) {
for (AnnotationDescription annotation : this) {
if (annotation.getAnnotationType().equals(annotationType)) {
return true;
}
}
return false;
}
@Override
public AnnotationDescription.Loadable ofType(Class annotationType) {
for (AnnotationDescription annotation : this) {
if (annotation.getAnnotationType().represents(annotationType)) {
return annotation.prepare(annotationType);
}
}
return null;
}
@Override
public AnnotationList inherited(Set ignoredTypes) {
List inherited = new ArrayList(size());
for (AnnotationDescription annotation : this) {
if (!ignoredTypes.contains(annotation.getAnnotationType()) && annotation.isInherited()) {
inherited.add(annotation);
}
}
return wrap(inherited);
}
@Override
public AnnotationList visibility(ElementMatcher matcher) {
List annotationDescriptions = new ArrayList(size());
for (AnnotationDescription annotation : this) {
if (matcher.matches(annotation.getRetention())) {
annotationDescriptions.add(annotation);
}
}
return wrap(annotationDescriptions);
}
@Override
public TypeList asTypeList() {
List annotationTypes = new ArrayList(size());
for (AnnotationDescription annotation : this) {
annotationTypes.add(annotation.getAnnotationType());
}
return new TypeList.Explicit(annotationTypes);
}
@Override
protected AnnotationList wrap(List values) {
return new Explicit(values);
}
}
/**
* Describes an array of loaded {@link java.lang.annotation.Annotation}s as an annotation list.
*/
class ForLoadedAnnotations extends AbstractBase {
/**
* The represented annotations.
*/
private final List annotations;
/**
* Creates a new list of loaded annotations.
*
* @param annotation The represented annotations.
*/
public ForLoadedAnnotations(Annotation... annotation) {
this(Arrays.asList(annotation));
}
/**
* Creates a new list of loaded annotations.
*
* @param annotations The represented annotations.
*/
public ForLoadedAnnotations(List annotations) {
this.annotations = annotations;
}
/**
* Creates a list of annotation lists representing the given loaded annotations.
*
* @param annotations The annotations to represent where each dimension is converted into a list.
* @return A list of annotation lists representing the given annotations.
*/
public static List asList(Annotation[][] annotations) {
List result = new ArrayList(annotations.length);
for (Annotation[] annotation : annotations) {
result.add(new ForLoadedAnnotations(annotation));
}
return result;
}
@Override
public AnnotationDescription get(int index) {
return AnnotationDescription.ForLoadedAnnotation.of(annotations.get(index));
}
@Override
public int size() {
return annotations.size();
}
}
/**
* Represents a list of explicitly provided annotation descriptions.
*/
class Explicit extends AbstractBase {
/**
* The list of represented annotation descriptions.
*/
private final List annotationDescriptions;
/**
* Creates a new list of annotation descriptions.
*
* @param annotationDescription The list of represented annotation descriptions.
*/
public Explicit(AnnotationDescription... annotationDescription) {
this(Arrays.asList(annotationDescription));
}
/**
* Creates a new list of annotation descriptions.
*
* @param annotationDescriptions The list of represented annotation descriptions.
*/
public Explicit(List annotationDescriptions) {
this.annotationDescriptions = annotationDescriptions;
}
/**
* Creates a list of annotation lists for a given multidimensional list of annotation descriptions.
*
* @param annotations The list of annotations to represent as a list of annotation lists.
* @return The list of annotation lists.
*/
public static List asList(List> annotations) {
List result = new ArrayList(annotations.size());
for (List annotation : annotations) {
result.add(new Explicit(annotation));
}
return result;
}
@Override
public AnnotationDescription get(int index) {
return annotationDescriptions.get(index);
}
@Override
public int size() {
return annotationDescriptions.size();
}
}
/**
* Represents an empty annotation list.
*/
class Empty extends FilterableList.Empty implements AnnotationList {
/**
* Creates a list of empty annotation lists of the given dimension.
*
* @param length The length of the list.
* @return A list of empty annotation lists of the given length.
*/
public static List asList(int length) {
List result = new ArrayList(length);
for (int i = 0; i < length; i++) {
result.add(new AnnotationList.Empty());
}
return result;
}
@Override
public boolean isAnnotationPresent(Class annotationType) {
return false;
}
@Override
public boolean isAnnotationPresent(TypeDescription annotationType) {
return false;
}
@Override
public AnnotationDescription.Loadable ofType(Class annotationType) {
return null;
}
@Override
public AnnotationList inherited(Set ignoredTypes) {
return this;
}
@Override
public AnnotationList visibility(ElementMatcher matcher) {
return this;
}
@Override
public TypeList asTypeList() {
return new TypeList.Empty();
}
}
}
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