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PicketLink Common Code
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/*
 * JBoss, Home of Professional Open Source
 *
 * Copyright 2013 Red Hat, Inc. and/or its affiliates.
 *
 * 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.picketlink.common.properties;

import org.picketlink.common.reflection.Reflections;

import java.lang.annotation.Annotation;
import java.lang.reflect.Field;
import java.lang.reflect.Member;
import java.lang.reflect.Type;

import static org.picketlink.common.reflection.Reflections.getFieldValue;
import static org.picketlink.common.reflection.Reflections.setFieldValue;

/**
 * A bean property based on the value contained in a field
 */
class FieldPropertyImpl implements FieldProperty {

    private final Field field;

    FieldPropertyImpl(Field field) {
        this.field = field;
    }

    @Override
    public String getName() {
        return field.getName();
    }

    @Override
    public Type getBaseType() {
        return field.getGenericType();
    }

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

    @Override
    public Member getMember() {
        return field;
    }

    @SuppressWarnings("unchecked")
    @Override
    public Class getJavaClass() {
        return (Class) field.getType();
    }

    @Override
    public V getValue(Object instance) {
        setAccessible();
        return getFieldValue(field, instance, getJavaClass());
    }

    @Override
    public void setValue(Object instance, V value) {
        setAccessible();
        setFieldValue(true, field, instance, value);
    }

    @Override
    public Class getDeclaringClass() {
        return field.getDeclaringClass();
    }

    @Override
    public boolean isReadOnly() {
        return false;
    }

    @Override
    public void setAccessible() {
        Reflections.setAccessible(field);
    }

    @Override
    public boolean isAnnotationPresent(final Class annotation) {
        return getAnnotatedElement() != null && getAnnotatedElement().isAnnotationPresent(annotation);
    }

    @Override
    public String toString() {
        return field.toString();
    }

    @Override
    public int hashCode() {
        return field.hashCode();
    }

    @Override
    public boolean equals(Object obj) {
        return field.equals(obj);
    }
}