org.infinispan.cdi.util.Annotateds Maven / Gradle / Ivy
package org.infinispan.cdi.util;
import javax.enterprise.inject.spi.Annotated;
import javax.enterprise.inject.spi.AnnotatedCallable;
import javax.enterprise.inject.spi.AnnotatedConstructor;
import javax.enterprise.inject.spi.AnnotatedField;
import javax.enterprise.inject.spi.AnnotatedMethod;
import javax.enterprise.inject.spi.AnnotatedParameter;
import javax.enterprise.inject.spi.AnnotatedType;
import java.lang.annotation.Annotation;
import java.lang.reflect.Field;
import java.lang.reflect.InvocationTargetException;
import java.lang.reflect.Method;
import java.lang.reflect.Type;
import java.util.ArrayList;
import java.util.Collection;
import java.util.Collections;
import java.util.Comparator;
import java.util.List;
import java.util.Set;
/**
*
* Utilities for working with {@link Annotated}s.
*
*
*
* Includes utilities to check the equality of and create unique id's for
* Annotated instances.
*
*
* @author Stuart Douglas
*/
public class Annotateds {
/**
* Does the first stage of comparing AnnoatedCallables, however it cannot
* compare the method parameters
*/
private static class AnnotatedCallableComparator implements Comparator> {
public int compare(AnnotatedCallable arg0, AnnotatedCallable arg1) {
// compare the names first
int result = (arg0.getJavaMember().getName().compareTo(arg1.getJavaMember().getName()));
if (result != 0) {
return result;
}
result = arg0.getJavaMember().getDeclaringClass().getName().compareTo(arg1.getJavaMember().getDeclaringClass().getName());
if (result != 0) {
return result;
}
result = arg0.getParameters().size() - arg1.getParameters().size();
return result;
}
}
private static class AnnotatedMethodComparator implements Comparator> {
public static Comparator> instance() {
return new AnnotatedMethodComparator();
}
private AnnotatedCallableComparator callableComparator = new AnnotatedCallableComparator();
public int compare(AnnotatedMethod arg0, AnnotatedMethod arg1) {
int result = callableComparator.compare(arg0, arg1);
if (result != 0) {
return result;
}
for (int i = 0; i < arg0.getJavaMember().getParameterTypes().length; ++i) {
Class p0 = arg0.getJavaMember().getParameterTypes()[i];
Class p1 = arg1.getJavaMember().getParameterTypes()[i];
result = p0.getName().compareTo(p1.getName());
if (result != 0) {
return result;
}
}
return 0;
}
}
private static class AnnotatedConstructorComparator implements Comparator> {
public static Comparator> instance() {
return new AnnotatedConstructorComparator();
}
private AnnotatedCallableComparator callableComparator = new AnnotatedCallableComparator();
public int compare(AnnotatedConstructor arg0, AnnotatedConstructor arg1) {
int result = callableComparator.compare(arg0, arg1);
if (result != 0) {
return result;
}
for (int i = 0; i < arg0.getJavaMember().getParameterTypes().length; ++i) {
Class p0 = arg0.getJavaMember().getParameterTypes()[i];
Class p1 = arg1.getJavaMember().getParameterTypes()[i];
result = p0.getName().compareTo(p1.getName());
if (result != 0) {
return result;
}
}
return 0;
}
}
private static class AnnotatedFieldComparator implements Comparator> {
public static Comparator> instance() {
return new AnnotatedFieldComparator();
}
public int compare(AnnotatedField arg0, AnnotatedField arg1) {
if (arg0.getJavaMember().getName().equals(arg1.getJavaMember().getName())) {
return arg0.getJavaMember().getDeclaringClass().getName().compareTo(arg1.getJavaMember().getDeclaringClass().getName());
}
return arg0.getJavaMember().getName().compareTo(arg1.getJavaMember().getName());
}
}
private static class AnnotationComparator implements Comparator {
public static final Comparator INSTANCE = new AnnotationComparator();
public int compare(Annotation arg0, Annotation arg1) {
return arg0.annotationType().getName().compareTo(arg1.annotationType().getName());
}
}
private static class MethodComparator implements Comparator {
public static final Comparator INSTANCE = new MethodComparator();
public int compare(Method arg0, Method arg1) {
return arg0.getName().compareTo(arg1.getName());
}
}
private static final char SEPERATOR = ';';
private Annotateds() {
}
/**
* Generates a deterministic signature for an {@link AnnotatedType}. Two
* AnnotatedTypes that have the same annotations and underlying
* type will generate the same signature.
*
* This can be used to create a unique bean id for a passivation capable bean
* that is added directly through the SPI.
*
* @param annotatedType The type to generate a signature for
* @return A string representation of the annotated type
*/
public static String createTypeId(AnnotatedType annotatedType) {
return createTypeId(annotatedType.getJavaClass(), annotatedType.getAnnotations(), annotatedType.getMethods(), annotatedType.getFields(), annotatedType.getConstructors());
}
/**
* Generates a unique signature for a concrete class. Annotations are not
* read directly from the class, but are read from the
* annotations, methods, fields and
* constructors arguments
*
* @param clazz The java class tyoe
* @param annotations Annotations present on the java class
* @param methods The AnnotatedMethods to include in the signature
* @param fields The AnnotatedFields to include in the signature
* @param constructors The AnnotatedConstructors to include in the signature
* @return A string representation of the type
*/
public static String createTypeId(Class clazz, Collection annotations, Collection> methods, Collection> fields, Collection> constructors) {
StringBuilder builder = new StringBuilder();
builder.append(clazz.getName());
builder.append(createAnnotationCollectionId(annotations));
builder.append("{");
// now deal with the fields
List> sortedFields = new ArrayList>();
sortedFields.addAll(fields);
Collections.sort(sortedFields, AnnotatedFieldComparator.instance());
for (AnnotatedField field : sortedFields) {
if (!field.getAnnotations().isEmpty()) {
builder.append(createFieldId(field));
builder.append(SEPERATOR);
}
}
// methods
List> sortedMethods = new ArrayList>();
sortedMethods.addAll(methods);
Collections.sort(sortedMethods, AnnotatedMethodComparator.instance());
for (AnnotatedMethod method : sortedMethods) {
if (!method.getAnnotations().isEmpty() || hasMethodParameters(method)) {
builder.append(createCallableId(method));
builder.append(SEPERATOR);
}
}
// constructors
List> sortedConstructors = new ArrayList>();
sortedConstructors.addAll(constructors);
Collections.sort(sortedConstructors, AnnotatedConstructorComparator.instance());
for (AnnotatedConstructor constructor : sortedConstructors) {
if (!constructor.getAnnotations().isEmpty() || hasMethodParameters(constructor)) {
builder.append(createCallableId(constructor));
builder.append(SEPERATOR);
}
}
builder.append("}");
return builder.toString();
}
/**
* Generates a deterministic signature for an {@link AnnotatedField}. Two
* AnnotatedFields that have the same annotations and
* underlying field will generate the same signature.
*/
public static String createFieldId(AnnotatedField field) {
return createFieldId(field.getJavaMember(), field.getAnnotations());
}
/**
* Creates a deterministic signature for a {@link Field}.
*
* @param field The field to generate the signature for
* @param annotations The annotations to include in the signature
*/
public static String createFieldId(Field field, Collection annotations) {
StringBuilder builder = new StringBuilder();
builder.append(field.getDeclaringClass().getName());
builder.append('.');
builder.append(field.getName());
builder.append(createAnnotationCollectionId(annotations));
return builder.toString();
}
/**
* Generates a deterministic signature for an {@link AnnotatedCallable}. Two
* AnnotatedCallables that have the same annotations and
* underlying callable will generate the same signature.
*/
public static String createCallableId(AnnotatedCallable method) {
StringBuilder builder = new StringBuilder();
builder.append(method.getJavaMember().getDeclaringClass().getName());
builder.append('.');
builder.append(method.getJavaMember().getName());
builder.append(createAnnotationCollectionId(method.getAnnotations()));
builder.append(createParameterListId(method.getParameters()));
return builder.toString();
}
/**
* Generates a unique string representation of a list of
* {@link AnnotatedParameter}s.
*/
public static String createParameterListId(List> parameters) {
StringBuilder builder = new StringBuilder();
builder.append("(");
for (int i = 0; i < parameters.size(); ++i) {
AnnotatedParameter ap = parameters.get(i);
builder.append(createParameterId(ap));
if (i + 1 != parameters.size()) {
builder.append(',');
}
}
builder.append(")");
return builder.toString();
}
/**
* Creates a string representation of an {@link AnnotatedParameter}.
*/
public static String createParameterId(AnnotatedParameter annotatedParameter) {
return createParameterId(annotatedParameter.getBaseType(), annotatedParameter.getAnnotations());
}
/**
* Creates a string representation of a given type and set of annotations.
*/
public static String createParameterId(Type type, Set annotations) {
StringBuilder builder = new StringBuilder();
if (type instanceof Class) {
Class c = (Class) type;
builder.append(c.getName());
} else {
builder.append(type.toString());
}
builder.append(createAnnotationCollectionId(annotations));
return builder.toString();
}
private static boolean hasMethodParameters(AnnotatedCallable callable) {
for (AnnotatedParameter parameter : callable.getParameters()) {
if (!parameter.getAnnotations().isEmpty()) {
return true;
}
}
return false;
}
private static String createAnnotationCollectionId(Collection annotations) {
if (annotations.isEmpty()) {
return "";
}
StringBuilder builder = new StringBuilder();
builder.append('[');
List annotationList = new ArrayList(annotations.size());
annotationList.addAll(annotations);
Collections.sort(annotationList, AnnotationComparator.INSTANCE);
for (Annotation a : annotationList) {
builder.append('@');
builder.append(a.annotationType().getName());
builder.append('(');
Method[] declaredMethods = a.annotationType().getDeclaredMethods();
List methods = new ArrayList(declaredMethods.length);
for (Method m : declaredMethods) {
methods.add(m);
}
Collections.sort(methods, MethodComparator.INSTANCE);
for (int i = 0; i < methods.size(); ++i) {
Method method = methods.get(i);
try {
Object value = method.invoke(a);
builder.append(method.getName());
builder.append('=');
builder.append(value.toString());
} catch (NullPointerException e) {
throw new RuntimeException("NullPointerException accessing annotation member, annotation:" + a.annotationType().getName() + " member: " + method.getName(), e);
} catch (IllegalArgumentException e) {
throw new RuntimeException("IllegalArgumentException accessing annotation member, annotation:" + a.annotationType().getName() + " member: " + method.getName(), e);
} catch (IllegalAccessException e) {
throw new RuntimeException("IllegalAccessException accessing annotation member, annotation:" + a.annotationType().getName() + " member: " + method.getName(), e);
} catch (InvocationTargetException e) {
throw new RuntimeException("InvocationTargetException accessing annotation member, annotation:" + a.annotationType().getName() + " member: " + method.getName(), e);
}
if (i + 1 != methods.size()) {
builder.append(',');
}
}
builder.append(')');
}
builder.append(']');
return builder.toString();
}
}