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'rapiddweller Common' is an open source Java library
forked from Databene Commons by Volker Bergmann.
It provides extensions to the Java core library by utility classes, abstract concepts
and concrete implementations.
/*
* Copyright (C) 2004-2015 Volker Bergmann ([email protected]).
* All rights reserved.
*
* 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 com.rapiddweller.common.bean;
import com.rapiddweller.common.BeanUtil;
import com.rapiddweller.common.StringUtil;
import com.rapiddweller.common.UpdateFailedException;
import com.rapiddweller.common.mutator.NamedMutator;
import org.apache.logging.log4j.LogManager;
import org.apache.logging.log4j.Logger;
/**
* Mutates JavaBean object graphs.
* Created: 08.05.2005 06:24:41
*
* @author Volker Bergmann
*/
public class PropertyGraphMutator implements NamedMutator {
private static final Logger logger = LogManager.getLogger(PropertyGraphMutator.class);
private final boolean required;
private final boolean autoConvert;
private PropertyAccessor[] subAccessors;
private final NamedMutator lastMutator;
private final String propertyName;
// constructors ----------------------------------------------------------------------------------------------------
/**
* Instantiates a new Property graph mutator.
*
* @param propertyName the property name
*/
public PropertyGraphMutator(String propertyName) {
this(propertyName, true, false);
}
/**
* Instantiates a new Property graph mutator.
*
* @param propertyName the property name
* @param required the required
* @param autoConvert the auto convert
*/
public PropertyGraphMutator(String propertyName, boolean required, boolean autoConvert) {
this(null, propertyName, required, autoConvert);
}
/**
* Instantiates a new Property graph mutator.
*
* @param beanClass the bean class
* @param propertyName the property name
*/
public PropertyGraphMutator(Class beanClass, String propertyName) {
this(beanClass, propertyName, true, false);
}
/**
* Instantiates a new Property graph mutator.
*
* @param beanClass the bean class
* @param propertyName the property name
* @param required the required
* @param autoConvert the auto convert
*/
@SuppressWarnings("unchecked")
public PropertyGraphMutator(Class beanClass, String propertyName, boolean required, boolean autoConvert) {
this.propertyName = propertyName;
this.required = required;
this.autoConvert = autoConvert;
int separatorIndex = propertyName.indexOf('.');
if (separatorIndex >= 0) {
String[] nodeNames = StringUtil.tokenize(propertyName, '.');
Class nodeClass = beanClass;
subAccessors = new PropertyAccessor[nodeNames.length - 1];
for (int i = 0; i < nodeNames.length - 1; i++) {
subAccessors[i] = PropertyAccessorFactory.getAccessor(nodeClass, nodeNames[i], required);
nodeClass = subAccessors[i].getValueType();
}
String lastNodeName = nodeNames[nodeNames.length - 1];
if (beanClass != null) {
lastMutator = PropertyMutatorFactory.getPropertyMutator(
subAccessors[subAccessors.length - 1].getValueType(), lastNodeName, required, autoConvert);
} else {
lastMutator = new UntypedPropertyMutator(lastNodeName, required, autoConvert);
}
} else {
lastMutator = new TypedPropertyMutator(beanClass, propertyName, required, autoConvert);
}
}
/**
* Is required boolean.
*
* @return the boolean
*/
public boolean isRequired() {
return required;
}
/**
* Is auto convert boolean.
*
* @return the boolean
*/
public boolean isAutoConvert() {
return autoConvert;
}
// PropertyMutator interface ---------------------------------------------------------------------------------------
@Override
public String getName() {
return propertyName;
}
@Override
public void setValue(Object bean, Object propertyValue) throws UpdateFailedException {
if (bean == null) {
if (required) {
throw new IllegalArgumentException("Cannot set a property on null");
} else {
return;
}
}
logger.debug("setting property '" + getName() + "' to '" + propertyValue + "' on bean " + bean);
Object superBean = bean;
if (subAccessors != null) {
for (PropertyAccessor subAccessor : subAccessors) {
Object subBean = subAccessor.getValue(superBean);
if (subBean == null && propertyValue != null) {
// bean is null but since there is something to set create one
Class propertyType = subAccessor.getValueType();
subBean = BeanUtil.newInstance(propertyType);
BeanUtil.setPropertyValue(superBean, subAccessor.getPropertyName(), subBean);
}
superBean = subBean;
}
}
lastMutator.setValue(superBean, propertyValue);
}
/**
* Sets property graph.
*
* @param bean the bean
* @param propertyGraph the property graph
* @param propertyValue the property value
* @param required the required
* @param autoConvert the auto convert
*/
public static void setPropertyGraph(Object bean, String propertyGraph, Object propertyValue, boolean required, boolean autoConvert) {
new PropertyGraphMutator(bean.getClass(), propertyGraph, required, autoConvert).setValue(bean, propertyValue);
}
}