org.springframework.data.util.DirectFieldAccessFallbackBeanWrapper.java Source code

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Here is the source code for org.springframework.data.util.DirectFieldAccessFallbackBeanWrapper.java

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/*
 * Copyright 2012-2019 the original author or authors.
 *
 * 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
 *
 *      https://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.springframework.data.util;

import static org.springframework.util.ReflectionUtils.*;

import java.lang.reflect.Field;

import org.springframework.beans.BeanWrapperImpl;
import org.springframework.beans.NotReadablePropertyException;
import org.springframework.beans.NotWritablePropertyException;
import org.springframework.lang.Nullable;

/**
 * Custom extension of {@link BeanWrapperImpl} that falls back to direct field access in case the object or type being
 * wrapped does not use accessor methods.
 *
 * @author Oliver Gierke
 */
public class DirectFieldAccessFallbackBeanWrapper extends BeanWrapperImpl {

    public DirectFieldAccessFallbackBeanWrapper(Object entity) {
        super(entity);
    }

    public DirectFieldAccessFallbackBeanWrapper(Class<?> type) {
        super(type);
    }

    /*
     * (non-Javadoc)
     * @see org.springframework.beans.BeanWrapperImpl#getPropertyValue(java.lang.String)
     */
    @Override
    @Nullable
    public Object getPropertyValue(String propertyName) {

        try {
            return super.getPropertyValue(propertyName);
        } catch (NotReadablePropertyException e) {

            Field field = findField(getWrappedClass(), propertyName);

            if (field == null) {
                throw new NotReadablePropertyException(getWrappedClass(), propertyName,
                        "Could not find field for property during fallback access!");
            }

            makeAccessible(field);
            return getField(field, getWrappedInstance());
        }
    }

    /*
     * (non-Javadoc)
     * @see org.springframework.beans.BeanWrapperImpl#setPropertyValue(java.lang.String, java.lang.Object)
     */
    @Override
    public void setPropertyValue(String propertyName, @Nullable Object value) {

        try {
            super.setPropertyValue(propertyName, value);
        } catch (NotWritablePropertyException e) {

            Field field = findField(getWrappedClass(), propertyName);

            if (field == null) {
                throw new NotWritablePropertyException(getWrappedClass(), propertyName,
                        "Could not find field for property during fallback access!", e);
            }

            makeAccessible(field);
            setField(field, getWrappedInstance(), value);
        }
    }
}