br.com.anteros.bean.validation.util.FieldAccess Maven / Gradle / Ivy

Go to download
Show more of this group Show more artifacts with this name
Show all versions of Anteros-Bean-Validation Show documentation
Anteros Bean Validation for Java.
There is a newer version: 1.0.18
Show newest version
/*******************************************************************************
 * Copyright 2012 Anteros Tecnologia
 *  
 * 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 br.com.anteros.bean.validation.util;

import java.lang.annotation.ElementType;
import java.lang.reflect.Field;
import java.lang.reflect.Type;
import java.security.AccessController;
import java.security.PrivilegedAction;

/**
 * Description: direct field access strategy.

 */
public class FieldAccess extends AccessStrategy {

    private final Field field;

    /**
     * Create a new FieldAccess instance.
     * @param field
     */
    public FieldAccess(final Field field) {
        this.field = field;
        if (!field.isAccessible()) {
            run(new PrivilegedAction() {
                public Void run() {
                    field.setAccessible(true);
                    return null;
                }
            });
        }
    }

    /**
     * {@inheritDoc}
     */
    public Object get(final Object instance) {
        try {
            return field.get(instance);
        } catch (IllegalAccessException e) {
            throw new IllegalArgumentException(e);
        }
    }

    /**
     * {@inheritDoc}
     */
    public ElementType getElementType() {
        return ElementType.FIELD;
    }

    /**
     * {@inheritDoc}
     */
    public Type getJavaType() {
        return field.getGenericType();
    }

    /**
     * {@inheritDoc}
     */
    public String getPropertyName() {
        return field.getName();
    }

    /**
     * {@inheritDoc}
     */
    public String toString() {
        return field.toString();
    }

    /**
     * {@inheritDoc}
     */
    public boolean equals(Object o) {
        if (this == o) return true;
        if (o == null || getClass() != o.getClass()) return false;

        FieldAccess that = (FieldAccess) o;

        return field.equals(that.field);
    }

    /**
     * {@inheritDoc}
     */
    public int hashCode() {
        return field.hashCode();
    }

    private static  T run(PrivilegedAction action) {
        if (System.getSecurityManager() != null) {
            return AccessController.doPrivileged(action);
        } else {
            return action.run();
        }
    }

	public Field getField() {
		return field;
	}
}