org.datacleaner.lifecycle.MemberInjectionPoint Maven / Gradle / Ivy

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/**
 * DataCleaner (community edition)
 * Copyright (C) 2014 Free Software Foundation, Inc.
 *
 * This copyrighted material is made available to anyone wishing to use, modify,
 * copy, or redistribute it subject to the terms and conditions of the GNU
 * Lesser General Public License, as published by the Free Software Foundation.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
 * or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU Lesser General Public License
 * for more details.
 *
 * You should have received a copy of the GNU Lesser General Public License
 * along with this distribution; if not, write to:
 * Free Software Foundation, Inc.
 * 51 Franklin Street, Fifth Floor
 * Boston, MA  02110-1301  USA
 */
package org.datacleaner.lifecycle;

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

import org.datacleaner.configuration.InjectionPoint;

public final class MemberInjectionPoint extends AbstractInjectionPoint implements InjectionPoint {

    private final Object _instance;
    private final Member _member;
    private final int _parameterIndex;

    public MemberInjectionPoint(final Field field, final Object instance) {
        _instance = instance;
        _member = field;
        _parameterIndex = -1;
    }

    public MemberInjectionPoint(final Constructor constructor, final int parameterIndex) {
        _instance = null;
        _member = constructor;
        _parameterIndex = parameterIndex;
    }

    public MemberInjectionPoint(final Method method, final int parameterIndex, final Object instance) {
        _instance = instance;
        _member = method;
        _parameterIndex = parameterIndex;
    }

    @Override
    public String toString() {
        return "MemberInjectionPoint [member=" + _member + ", parameterIndex=" + _parameterIndex + ", instance="
                + _instance + "]";
    }

    @Override
    public Object getInstance() {
        return _instance;
    }

    @SuppressWarnings("unchecked")
    @Override
    public Class getBaseType() {
        if (_member instanceof Field) {
            return (Class) ((Field) _member).getType();
        } else if (_member instanceof Method) {
            return (Class) ((Method) _member).getParameterTypes()[_parameterIndex];
        } else if (_member instanceof Constructor) {
            return (Class) ((Constructor) _member).getParameterTypes()[_parameterIndex];
        }
        return null;
    }

    @Override
    public  A getAnnotation(final Class annotationClass) {
        if (_member instanceof Field) {
            return ((Field) _member).getAnnotation(annotationClass);
        } else if (_member instanceof Method) {
            return ((Method) _member).getAnnotation(annotationClass);
        } else if (_member instanceof Constructor) {
            return ((Constructor) _member).getAnnotation(annotationClass);
        }
        return null;
    }

    @Override
    protected Type getGenericType() {
        if (_member instanceof Field) {
            return ((Field) _member).getGenericType();
        } else if (_member instanceof Method) {
            return ((Method) _member).getGenericParameterTypes()[_parameterIndex];
        } else if (_member instanceof Constructor) {
            return ((Constructor) _member).getGenericParameterTypes()[_parameterIndex];
        }
        return null;
    }
}