org.jboss.weld.annotated.slim.backed.BackedAnnotatedParameter Maven / Gradle / Ivy

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package org.jboss.weld.annotated.slim.backed;

import static org.jboss.weld.util.reflection.Reflections.cast;

import java.io.ObjectInputStream;
import java.io.ObjectStreamException;
import java.io.Serializable;
import java.lang.annotation.Annotation;
import java.lang.reflect.AnnotatedElement;
import java.lang.reflect.Type;
import java.util.Set;

import javax.enterprise.inject.spi.AnnotatedCallable;
import javax.enterprise.inject.spi.AnnotatedParameter;

import org.jboss.weld.exceptions.InvalidObjectException;
import org.jboss.weld.logging.BeanLogger;
import org.jboss.weld.resources.ReflectionCache;
import org.jboss.weld.resources.SharedObjectCache;
import org.jboss.weld.util.LazyValueHolder;
import org.jboss.weld.util.reflection.Formats;
import org.jboss.weld.util.reflection.RawType;

import edu.umd.cs.findbugs.annotations.SuppressWarnings;

@SuppressWarnings(value = { "SE_BAD_FIELD", "SE_NO_SUITABLE_CONSTRUCTOR", "SE_NO_SERIALVERSIONID" }, justification = "False positive from FindBugs - serialization is handled by SerializationProxy.")
public class BackedAnnotatedParameter extends BackedAnnotated implements AnnotatedParameter, Serializable {

    public static  AnnotatedParameter of(Type baseType, Annotation[] annotations, int position, BackedAnnotatedCallable declaringCallable, SharedObjectCache sharedObjectCache) {
        return new BackedAnnotatedParameter(baseType, annotations, position, declaringCallable, sharedObjectCache);
    }

    private final int position;
    private final BackedAnnotatedCallable declaringCallable;

    public BackedAnnotatedParameter(Type baseType, Annotation[] annotations, int position, BackedAnnotatedCallable declaringCallable, SharedObjectCache sharedObjectCache) {
        super(baseType, sharedObjectCache);
        this.position = position;
        this.declaringCallable = declaringCallable;
    }

    @Override
    protected LazyValueHolder> initTypeClosure(Type baseType, SharedObjectCache cache) {
        return cache.getTypeClosureHolder(RawType.wrap(baseType));
    }

    @Override
    public int getPosition() {
        return position;
    }

    @Override
    public BackedAnnotatedCallable getDeclaringCallable() {
        return declaringCallable;
    }

    @Override
    public  T getAnnotation(Class annotationType) {
        for (Annotation annotation : getAnnotations()) {
            if (annotation.annotationType().equals(annotationType)) {
                return cast(annotation);
            }
        }
        return null;
    }

    @Override
    public Set getAnnotations() {
        return getReflectionCache().getParameterAnnotationSet(this);
    }

    @Override
    protected AnnotatedElement getAnnotatedElement() {
        return null;
    }

    @Override
    public boolean isAnnotationPresent(Class annotationType) {
        return getAnnotation(annotationType) != null;
    }

    @Override
    public int hashCode() {
        final int prime = 31;
        int result = 1;
        result = prime * result + ((declaringCallable == null) ? 0 : declaringCallable.hashCode());
        result = prime * result + position;
        return result;
    }

    @Override
    public boolean equals(Object obj) {
        if (this == obj) {
            return true;
        }
        if (obj == null) {
            return false;
        }
        if (getClass() != obj.getClass()) {
            return false;
        }
        BackedAnnotatedParameter other = (BackedAnnotatedParameter) obj;
        if (declaringCallable == null) {
            if (other.declaringCallable != null) {
                return false;
            }
        } else if (!declaringCallable.equals(other.declaringCallable)) {
            return false;
        }
        if (position != other.position) {
            return false;
        }
        return true;
    }

    @Override
    public String toString() {
        return Formats.formatAnnotatedParameter(this);
    }

    // Serialization

    private Object writeReplace() throws ObjectStreamException {
        return new SerializationProxy(this);
    }

    private void readObject(ObjectInputStream stream) throws InvalidObjectException {
        throw BeanLogger.LOG.proxyRequired();
    }

    private static class SerializationProxy implements Serializable {

        private static final long serialVersionUID = 8784172191880064479L;

        // either BackedAnnotatedMethod or BackedAnnotatedConstructor which are capable of serializing properly
        private final AnnotatedCallable callable;
        private final int position;

        public SerializationProxy(BackedAnnotatedParameter parameter) {
            this.callable = parameter.getDeclaringCallable();
            this.position = parameter.getPosition();
        }

        private Object readResolve() throws ObjectStreamException {
            return callable.getParameters().get(position);
        }
    }

    @Override
    protected ReflectionCache getReflectionCache() {
        return getDeclaringCallable().getDeclaringType().getReflectionCache();
    }
}