package org.infinispan.cdi.common.util;
import java.lang.annotation.Annotation;
import java.lang.reflect.Type;
import java.util.Collection;
import java.util.HashSet;
import java.util.Set;
import javax.enterprise.context.Dependent;
import javax.enterprise.inject.Alternative;
import javax.enterprise.inject.spi.AnnotatedType;
import javax.enterprise.inject.spi.Bean;
import javax.enterprise.inject.spi.BeanManager;
import javax.enterprise.inject.spi.InjectionPoint;
import javax.enterprise.inject.spi.InjectionTarget;
import javax.enterprise.inject.spi.PassivationCapable;
import javax.inject.Named;
/**
* <p>
* A builder class for creating immutable beans. The builder can create
* {@link PassivationCapable} beans, using
* {@link Annotateds#createTypeId(AnnotatedType)} to generate the id.
* </p>
* <p/>
* <p>
* The builder can read from an {@link AnnotatedType} and have any attribute
* modified. This class is not thread-safe, but the bean created by calling
* {@link #create()} is.
* </p>
* <p/>
* <p>
* It is advised that a new bean builder is instantiated for each bean created.
* </p>
*
* @author Stuart Douglas
* @author Pete Muir
* @see ImmutableBean
* @see ImmutablePassivationCapableBean
*/
public class BeanBuilder<T> {
private final BeanManager beanManager;
private Class<?> beanClass;
private String name;
private Set<Annotation> qualifiers;
private Class<? extends Annotation> scope;
private Set<Class<? extends Annotation>> stereotypes;
private Set<Type> types;
private Set<InjectionPoint> injectionPoints;
private boolean alternative;
private boolean nullable;
private ContextualLifecycle<T> beanLifecycle;
boolean passivationCapable;
private String id;
private String toString;
/**
* Instantiate a new bean builder.
*
* @param beanManager the bean manager to use for creating injection targets
* and determining if annotations are qualifiers, scopes or
* stereotypes.
*/
public BeanBuilder(BeanManager beanManager) {
this.beanManager = beanManager;
this.types = new HashSet<Type>();
}
/**
* <p>
* Read the {@link AnnotatedType}, creating a bean from the class and it's
* annotations.
* </p>
* <p/>
* <p>
* By default the bean lifecycle will wrap the result of calling
* {@link BeanManager#createInjectionTarget(AnnotatedType)}.
* </p>
* <p/>
* <p>
* {@link BeanBuilder} does <em>not</em> support reading members of the class
* to create producers or observer methods.
* </p>
*
* @param type the type to read
*/
public BeanBuilder<T> readFromType(AnnotatedType<T> type) {
this.beanClass = type.getJavaClass();
InjectionTarget<T> injectionTarget;
if (!type.getJavaClass().isInterface()) {
injectionTarget = beanManager.createInjectionTarget(type);
} else {
injectionTarget = new DummyInjectionTarget<T>();
}
this.beanLifecycle = new DelegatingContextualLifecycle<T>(injectionTarget);
this.injectionPoints = injectionTarget.getInjectionPoints();
this.qualifiers = new HashSet<Annotation>();
this.stereotypes = new HashSet<Class<? extends Annotation>>();
for (Annotation annotation : type.getAnnotations()) {
if (beanManager.isQualifier(annotation.annotationType())) {
this.qualifiers.add(annotation);
} else if (beanManager.isScope(annotation.annotationType())) {
this.scope = annotation.annotationType();
} else if (beanManager.isStereotype(annotation.annotationType())) {
this.stereotypes.add(annotation.annotationType());
}
if (annotation instanceof Named) {
this.name = ((Named) annotation).value();
}
if (annotation instanceof Alternative) {
this.alternative = true;
}
}
if (this.scope == null) {
this.scope = Dependent.class;
}
for (Class<?> c = type.getJavaClass(); c != Object.class && c != null; c = c.getSuperclass()) {
this.types.add(c);
}
for (Class<?> i : type.getJavaClass().getInterfaces()) {
this.types.add(i);
}
if (qualifiers.isEmpty()) {
qualifiers.add(DefaultLiteral.INSTANCE);
}
qualifiers.add(AnyLiteral.INSTANCE);
this.id = ImmutableBean.class.getName() + ":" + Annotateds.createTypeId(type);
return this;
}
/**
* <p>
* Use the bean builder's current state to define the bean.
* </p>
*
* @return the bean
*/
public Bean<T> create() {
if (!passivationCapable) {
return new ImmutableBean<T>(beanClass, name, qualifiers, scope, stereotypes, types, alternative, nullable, injectionPoints, beanLifecycle, toString);
} else {
return new ImmutablePassivationCapableBean<T>(id, beanClass, name, qualifiers, scope, stereotypes, types, alternative, nullable, injectionPoints, beanLifecycle, toString);
}
}
/**
* Qualifiers currently defined for bean creation.
*
* @return the qualifiers current defined
*/
public Set<Annotation> getQualifiers() {
return qualifiers;
}
/**
* Define the qualifiers used for bean creation.
*
* @param qualifiers the qualifiers to use
*/
public BeanBuilder<T> qualifiers(Set<Annotation> qualifiers) {
this.qualifiers = qualifiers;
return this;
}
/**
* Define the qualifiers used for bean creation.
*
* @param qualifiers the qualifiers to use
*/
public BeanBuilder<T> qualifiers(Annotation... qualifiers) {
this.qualifiers = Arrays2.asSet(qualifiers);
return this;
}
/**
* Add to the qualifiers used for bean creation.
*
* @param qualifiers the additional qualifier to use
*/
public BeanBuilder<T> addQualifier(Annotation qualifier) {
this.qualifiers.add(qualifier);
return this;
}
/**
* Add to the qualifiers used for bean creation.
*
* @param qualifiers the additional qualifiers to use
*/
public BeanBuilder<T> addQualifiers(Annotation... qualifiers) {
this.qualifiers.addAll(Arrays2.asSet(qualifiers));
return this;
}
/**
* Add to the qualifiers used for bean creation.
*
* @param qualifiers the additional qualifiers to use
*/
public BeanBuilder<T> addQualifiers(Collection<Annotation> qualifiers) {
this.qualifiers.addAll(qualifiers);
return this;
}
/**
* Scope currently defined for bean creation.
*
* @return the scope currently defined
*/
public Class<? extends Annotation> getScope() {
return scope;
}
/**
* Define the scope used for bean creation.
*
* @param scope the scope to use
*/
public BeanBuilder<T> scope(Class<? extends Annotation> scope) {
this.scope = scope;
return this;
}
/**
* Stereotypes currently defined for bean creation.
*
* @return the stereotypes currently defined
*/
public Set<Class<? extends Annotation>> getStereotypes() {
return stereotypes;
}
/**
* Define the stereotypes used for bean creation.
*
* @param stereotypes the stereotypes to use
*/
public BeanBuilder<T> stereotypes(Set<Class<? extends Annotation>> stereotypes) {
this.stereotypes = stereotypes;
return this;
}
/**
* Type closure currently defined for bean creation.
*
* @return the type closure currently defined
*/
public Set<Type> getTypes() {
return types;
}
/**
* Define the type closure used for bean creation.
*
* @param types the type closure to use
*/
public BeanBuilder<T> types(Set<Type> types) {
this.types = types;
return this;
}
/**
* Define the type closure used for bean creation.
*
* @param types the type closure to use
*/
public BeanBuilder<T> types(Type... types) {
this.types = Arrays2.asSet(types);
return this;
}
/**
* Add to the type closure used for bean creation.
*
* @param type additional type to use
*/
public BeanBuilder<T> addType(Type type) {
this.types.add(type);
return this;
}
/**
* Add to the type closure used for bean creation.
*
* @param types the additional types to use
*/
public BeanBuilder<T> addTypes(Type... types) {
this.types.addAll(Arrays2.asSet(types));
return this;
}
/**
* Add to the type closure used for bean creation.
*
* @param types the additional types to use
*/
public BeanBuilder<T> addTypes(Collection<Type> types) {
this.types.addAll(types);
return this;
}
/**
* Whether the created bean will be an alternative.
*
* @return <code>true</code> if the created bean will be an alternative,
* otherwise <code>false</code>
*/
public boolean isAlternative() {
return alternative;
}
/**
* Define that the created bean will (or will not) be an alternative.
*
* @param alternative <code>true</code> if the created bean should be an
* alternative, otherwise <code>false</code>
*/
public BeanBuilder<T> alternative(boolean alternative) {
this.alternative = alternative;
return this;
}
/**
* Whether the created bean will be nullable.
*
* @return <code>true</code> if the created bean will be nullable, otherwise
* <code>false</code>
*/
public boolean isNullable() {
return nullable;
}
/**
* Define that the created bean will (or will not) be nullable.
*
* @param nullable <code>true</code> if the created bean should be nullable,
* otherwise <code>false</code>
*/
public BeanBuilder<T> nullable(boolean nullable) {
this.nullable = nullable;
return this;
}
/**
* The {@link ContextualLifecycle} currently defined for bean creation.
*
* @return the bean lifecycle currently defined
*/
public ContextualLifecycle<T> getBeanLifecycle() {
return beanLifecycle;
}
/**
* Define the {@link ContextualLifecycle} used for bean creation.
*
* @param beanLifecycle the {@link ContextualLifecycle} to use for bean
* creation.
*/
public BeanBuilder<T> beanLifecycle(ContextualLifecycle<T> beanLifecycle) {
this.beanLifecycle = beanLifecycle;
return this;
}
/**
* The bean class currently defined for bean creation.
*
* @return the bean class currently defined.
*/
public Class<?> getBeanClass() {
return beanClass;
}
/**
* Define the bean class used for bean creation.
*
* @param beanClass the bean class to use
*/
public BeanBuilder<T> beanClass(Class<?> beanClass) {
this.beanClass = beanClass;
return this;
}
/**
* The bean manager in use. This cannot be changed for this
* {@link BeanBuilder}.
*
* @return the bean manager in use
*/
public BeanManager getBeanManager() {
return beanManager;
}
/**
* The name of the bean currently defined for bean creation.
*
* @return the name of the bean or <code>null</code> if the bean has no name
*/
public String getName() {
return name;
}
/**
* Define the name of the bean used for bean creation.
*
* @param name the name of the bean to use or <code>null</code> if the bean
* should have no name
*/
public BeanBuilder<T> name(String name) {
this.name = name;
return this;
}
/**
* Whether the created bean will be passivation capable.
*
* @return <code>true</code> if the created bean will be passivation capable,
* otherwise <code>false</code>
*/
public boolean isPassivationCapable() {
return passivationCapable;
}
/**
* Define that the created bean will (or will not) be passivation capable.
*
* @param nullable <code>true</code> if the created bean should be
* passivation capable, otherwise <code>false</code>
*/
public BeanBuilder<T> passivationCapable(boolean passivationCapable) {
this.passivationCapable = passivationCapable;
return this;
}
/**
* The id currently defined for bean creation.
*
* @return the id currently defined.
*/
public String getId() {
return id;
}
/**
* Define the id used for bean creation.
*
* @param id the id to use
*/
public BeanBuilder<T> id(String id) {
this.id = id;
return this;
}
/**
* The injection points currently defined for bean creation.
*
* @return the injection points currently defined.
*/
public Set<InjectionPoint> getInjectionPoints() {
return injectionPoints;
}
/**
* Define the injection points used for bean creation.
*
* @param injectionPoints the injection points to use
*/
public BeanBuilder<T> injectionPoints(Set<InjectionPoint> injectionPoints) {
this.injectionPoints = injectionPoints;
return this;
}
/**
* Define the string used when {@link #toString()} is called on the bean.
*
* @param toString the string to use
*/
public BeanBuilder<T> toString(String toString) {
this.toString = toString;
return this;
}
/**
* The string used when {@link #toString()} is called on the bean.
*
* @return the string currently defined
*/
public String getToString() {
return toString;
}
}