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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.introspector.jlr;

import org.jboss.weld.exceptions.WeldException;
import org.jboss.weld.introspector.TypeClosureLazyValueHolder;
import org.jboss.weld.introspector.WeldClass;
import org.jboss.weld.introspector.WeldField;
import org.jboss.weld.resources.ClassTransformer;
import org.jboss.weld.util.LazyValueHolder;
import org.jboss.weld.util.reflection.Formats;
import org.jboss.weld.util.reflection.Reflections;
import org.jboss.weld.util.reflection.SecureReflections;

import javax.enterprise.inject.spi.AnnotatedField;
import java.lang.annotation.Annotation;
import java.lang.reflect.Field;
import java.lang.reflect.Type;
import java.util.Map;
import java.util.Set;

import static org.jboss.weld.logging.messages.UtilMessage.ACCESS_ERROR_ON_FIELD;

/**
 * Represents an annotated field
 * 
 * This class is immutable, and therefore threadsafe
 *
 * @param 
 * @author Pete Muir
 */
public class WeldFieldImpl extends AbstractWeldMember implements WeldField {

    // The underlying field
    private final Field field;

    public static  WeldFieldImpl of(Field field, WeldClass declaringClass, ClassTransformer classTransformer) {
        return new WeldFieldImpl(field, Reflections.>cast(field.getType()), field.getGenericType(), new TypeClosureLazyValueHolder(field.getGenericType()), buildAnnotationMap(field.getAnnotations()), buildAnnotationMap(field.getDeclaredAnnotations()), declaringClass, classTransformer);
    }

    public static  WeldFieldImpl of(AnnotatedField annotatedField, WeldClass declaringClass, ClassTransformer classTransformer) {
        return new WeldFieldImpl(annotatedField.getJavaMember(), Reflections.>cast(annotatedField.getJavaMember().getType()), annotatedField.getBaseType(), new TypeClosureLazyValueHolder(annotatedField.getTypeClosure()), buildAnnotationMap(annotatedField.getAnnotations()), buildAnnotationMap(annotatedField.getAnnotations()), declaringClass, classTransformer);
    }

    /**
     * Constructor
     * 
     * Initializes the superclass with the built annotation map and detects the
     * type arguments
     *
     * @param field          The actual field
     * @param declaringClass The abstraction of the declaring class
     */
    private WeldFieldImpl(Field field, final Class rawType, final Type type, LazyValueHolder> typeClosure, Map, Annotation> annotationMap, Map, Annotation> declaredAnnotationMap, WeldClass declaringClass, ClassTransformer classTransformer) {
        super(annotationMap, declaredAnnotationMap, classTransformer, field, rawType, type, typeClosure, declaringClass);
        this.field = field;
    }

    /**
     * Gets the underlying field
     *
     * @return The fields
     */
    public Field getAnnotatedField() {
        return field;
    }

    @Override
    public Field getDelegate() {
        return field;
    }

    public void set(Object instance, Object value) throws IllegalArgumentException, IllegalAccessException {
        SecureReflections.ensureAccessible(field).set(instance, value);
    }

    public void setOnInstance(Object instance, Object value) throws IllegalArgumentException, SecurityException, IllegalAccessException, NoSuchFieldException {
        SecureReflections.getField(instance.getClass(), getName()).set(instance, value);
    }

    public T get(Object instance) {
        try {
            return Reflections.cast(SecureReflections.ensureAccessible(getDelegate()).get(instance));
        } catch (Exception e) {
            throw new WeldException(ACCESS_ERROR_ON_FIELD, e, getDelegate().getName(), getDelegate().getDeclaringClass());
        }
    }

    /**
     * Gets the property name
     *
     * @return The property name
     * @see org.jboss.weld.introspector.WeldField#getName()
     */
    public String getPropertyName() {
        return getName();
    }

    /**
     * Gets a string representation of the field
     *
     * @return A string representation
     */
    @Override
    public String toString() {
        return "[field] " + Formats.addSpaceIfNeeded(Formats.formatAnnotations(getAnnotations())) + Formats.addSpaceIfNeeded(Formats.formatModifiers(getJavaMember().getModifiers())) + getDeclaringType().getName() + "." + getName();
    }

    public boolean isGeneric() {
        return false;
    }

}