org.jboss.weld.metadata.cache.QualifierModel Maven / Gradle / Ivy

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/*
 * JBoss, Home of Professional Open Source
 * Copyright 2008, Red Hat, Inc., and individual contributors
 * by the @authors tag. See the copyright.txt in the distribution for a
 * full listing of individual contributors.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 * http://www.apache.org/licenses/LICENSE-2.0
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package org.jboss.weld.metadata.cache;

import java.lang.annotation.Annotation;
import java.lang.annotation.Target;
import java.lang.reflect.InvocationTargetException;
import java.util.Collections;
import java.util.Set;

import javax.enterprise.util.Nonbinding;
import javax.inject.Qualifier;

import org.jboss.weld.exceptions.WeldException;
import org.jboss.weld.introspector.WeldMethod;
import org.jboss.weld.resources.ClassTransformer;
import org.jboss.weld.util.collections.Arrays2;
import org.jboss.weld.util.reflection.Reflections;
import org.slf4j.cal10n.LocLogger;

import static java.lang.annotation.ElementType.FIELD;
import static java.lang.annotation.ElementType.METHOD;
import static java.lang.annotation.ElementType.PARAMETER;
import static java.lang.annotation.ElementType.TYPE;
import static org.jboss.weld.logging.Category.REFLECTION;
import static org.jboss.weld.logging.LoggerFactory.loggerFactory;
import static org.jboss.weld.logging.messages.MetadataMessage.NON_BINDING_MEMBER_TYPE;
import static org.jboss.weld.logging.messages.ReflectionMessage.MISSING_TARGET;
import static org.jboss.weld.logging.messages.ReflectionMessage.MISSING_TARGET_METHOD_FIELD_PARAMETER_TYPE;

/**
 * Model of a binding type
 *
 * @author Pete Muir
 */
public class QualifierModel extends AnnotationModel {
    private static final LocLogger log = loggerFactory().getLogger(REFLECTION);

    private static final Set> META_ANNOTATIONS = Collections.>singleton(Qualifier.class);

    // The non-binding types
    private Set> nonBindingMembers;


    /**
     * Constructor
     *
     * @param type The type
     */
    public QualifierModel(Class type, ClassTransformer transformer) {
        super(type, transformer);
    }

    /**
     * Initializes the non-binding types and validates the members
     */
    @Override
    protected void init() {
        initNonBindingMembers();
        super.init();
    }

    @Override
    protected void initValid() {
        super.initValid();
        for (WeldMethod annotatedMethod : getAnnotatedAnnotation().getMembers()) {
            if ((Reflections.isArrayType(annotatedMethod.getJavaClass()) || Annotation.class.isAssignableFrom(annotatedMethod.getJavaClass())) && !nonBindingMembers.contains(annotatedMethod)) {
                log.debug(NON_BINDING_MEMBER_TYPE, annotatedMethod);
                super.valid = false;
            }
        }
    }

    /**
     * Validates the members
     */
    protected void check() {
        super.check();
        if (isValid()) {

            if (!getAnnotatedAnnotation().isAnnotationPresent(Target.class)) {
                log.debug(MISSING_TARGET, getAnnotatedAnnotation());
            } else if (!Arrays2.unorderedEquals(getAnnotatedAnnotation().getAnnotation(Target.class).value(), METHOD, FIELD, PARAMETER, TYPE)) {
                log.debug(MISSING_TARGET_METHOD_FIELD_PARAMETER_TYPE, getAnnotatedAnnotation());
            }
        }
    }

    /**
     * Gets the meta-annotation type
     *
     * @return The BindingType class
     */
    @Override
    protected Set> getMetaAnnotationTypes() {
        return META_ANNOTATIONS;
    }

    /**
     * Indicates if there are non-binding types present
     *
     * @return True if present, false otherwise
     */
    public boolean hasNonBindingMembers() {
        return nonBindingMembers.size() > 0;
    }

    /**
     * Gets the non-binding types
     *
     * @return A set of non-binding types, or an empty set if there are none
     *         present
     */
    public Set> getNonBindingMembers() {
        return nonBindingMembers;
    }

    /**
     * Initializes the non-binding types
     */
    protected void initNonBindingMembers() {
        nonBindingMembers = getAnnotatedAnnotation().getMembers(Nonbinding.class);
    }

    /**
     * Comparator for checking equality
     *
     * @param instance The instance to check against
     * @param other    The other binding type
     * @return True if equal, false otherwise
     */
    public boolean isEqual(Annotation instance, Annotation other) {
        if (instance.annotationType().equals(getRawType()) && other.annotationType().equals(getRawType())) {
            for (WeldMethod annotatedMethod : getAnnotatedAnnotation().getMembers()) {
                if (!nonBindingMembers.contains(annotatedMethod)) {
                    try {
                        Object thisValue = annotatedMethod.invoke(instance);
                        Object thatValue = annotatedMethod.invoke(other);
                        if (!thisValue.equals(thatValue)) {
                            return false;
                        }
                    } catch (IllegalArgumentException e) {
                        throw new WeldException(e);
                    } catch (IllegalAccessException e) {
                        throw new WeldException(e);
                    } catch (InvocationTargetException e) {
                        throw new WeldException(e);
                    }

                }
            }
            return true;
        }
        return false;
    }

    /**
     * Gets a string representation of the qualifier model
     *
     * @return The string representation
     */
    @Override
    public String toString() {
        return (isValid() ? "Valid" : "Invalid") + " qualifer model for " + getRawType() + " with non-binding members " + getNonBindingMembers();
    }

}