net.smartlab.web.bean.Valorizer Maven / Gradle / Ivy
/*
* The SmartWeb Framework
* Copyright (C) 2004-2006
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* This library 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 library; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*
* For further informations on the SmartWeb Framework please visit
*
* http://smartweb.sourceforge.net
*/
package net.smartlab.web.bean;
import java.beans.PropertyDescriptor;
import java.lang.reflect.InvocationTargetException;
import java.util.Iterator;
import java.util.Locale;
import java.util.Map;
import org.apache.commons.beanutils.DynaBean;
import org.apache.commons.beanutils.DynaClass;
import org.apache.commons.beanutils.DynaProperty;
import org.apache.commons.beanutils.PropertyUtils;
import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
/**
* TODO class documentation
*
* @author rlogiacco
* @uml.dependency supplier="net.smartlab.web.bean.ValorizationException"
*/
public class Valorizer {
/* # net.smartlab.web.bean.ValorizationException Dependency_Link1 */
/* # net.smartlab.web.bean.ValorizationException ve */
private static Log logger = LogFactory.getLog(Valorizer.class);
private static ConverterManager converter = ConverterManager.getDefault();
/**
* TODO documentation
*
* @param bean
* @param name
* @param value
* @param locale
* @throws ValorizationException
* @throws ConversionException
*/
protected static void set(Object bean, String name, Object value, Locale locale) throws ValorizationException,
ConversionException {
if (logger.isTraceEnabled()) {
logger.trace("setProperty(" + bean + ", " + name + ", " + value + ", " + locale + ")");
}
try {
// Resolve any nested expression to get the actual target bean
Object target = bean;
int delim = name.lastIndexOf(PropertyUtils.NESTED_DELIM);
if (delim >= 0) {
try {
target = PropertyUtils.getProperty(bean, name.substring(0, delim));
} catch (NoSuchMethodException e) {
// Skip this property setter
return;
}
name = name.substring(delim + 1);
if (logger.isTraceEnabled()) {
logger.trace(" target bean = " + target);
logger.trace(" target name = " + name);
}
}
// Simple name of target property
String property = null;
// Java type of target property
Class type = null;
// Indexed subscript value (if any)
int index = -1;
// Mapped key value (if any)
String key = null;
// Calculate the target property name, index, and key values
property = name;
int i = property.indexOf(PropertyUtils.INDEXED_DELIM);
if (i >= 0) {
int k = property.indexOf(PropertyUtils.INDEXED_DELIM2);
try {
index = Integer.parseInt(property.substring(i + 1, k));
} catch (NumberFormatException nfe) {
logger.debug(nfe);
}
property = property.substring(0, i);
}
int j = property.indexOf(PropertyUtils.MAPPED_DELIM);
if (j >= 0) {
int k = property.indexOf(PropertyUtils.MAPPED_DELIM2);
try {
key = property.substring(j + 1, k);
} catch (IndexOutOfBoundsException ioobe) {
logger.debug(ioobe);
}
property = property.substring(0, j);
}
// Calculate the target property type
if (target instanceof DynaBean) {
DynaClass dynaClass = ((DynaBean)target).getDynaClass();
DynaProperty dynaProperty = dynaClass.getDynaProperty(property);
if (dynaProperty == null) {
// Skip this property setter
return;
}
type = dynaProperty.getType();
} else {
PropertyDescriptor descriptor = null;
try {
descriptor = PropertyUtils.getPropertyDescriptor(target, name);
if (descriptor == null) {
// Skip this property setter
return;
}
} catch (NoSuchMethodException nsme) {
// Skip this property setter
return;
}
type = descriptor.getPropertyType();
if (type == null) {
// Most likely an indexed setter on a POJB only
if (logger.isTraceEnabled()) {
logger.trace(" target type for property '" + property + "' is null, so skipping this setter");
}
return;
}
}
if (logger.isTraceEnabled()) {
logger.trace(" target property = " + property + ", type = " + type + ", index = " + index
+ ", key = " + key);
}
// Convert the specified value to the required type and store it
if (index >= 0) {
converter.convert(type, value, locale);
try {
PropertyUtils.setIndexedProperty(target, property, index, value);
} catch (NoSuchMethodException e) {
throw new InvocationTargetException(e, "Cannot set " + property);
}
} else if (key != null) {
// Map based destination
// Maps do not know what the preferred data type is,
// so perform no conversions at all
try {
PropertyUtils.setMappedProperty(target, property, key, value);
} catch (NoSuchMethodException e) {
throw new InvocationTargetException(e, "Cannot set " + property);
}
} else {
// Bean destination
value = converter.convert(type, value, locale);
try {
PropertyUtils.setSimpleProperty(target, property, value);
} catch (NoSuchMethodException e) {
throw new InvocationTargetException(e, "Cannot set " + property);
}
}
} catch (IllegalAccessException iae) {
throw new ValorizationException(iae);
} catch (InvocationTargetException ite) {
throw new ValorizationException(ite.getTargetException());
}
}
/**
* TODO method documentation
*
* @param src
* @param dst
* @param locale
* @throws ConversionException
* @throws ValorizationException
*/
public static void copy(Object src, Object dst, Locale locale) throws ConversionException, ValorizationException {
if (dst == null) {
throw new IllegalArgumentException("No destination specified");
}
if (src == null) {
throw new IllegalArgumentException("No origin specified");
}
if (logger.isDebugEnabled()) {
logger.debug("populate(" + dst + ", " + src + ")");
}
if (src instanceof DynaBean) {
DynaProperty descriptors[] = ((DynaBean)src).getDynaClass().getDynaProperties();
for (int i = 0; i < descriptors.length; i++) {
String name = descriptors[i].getName();
if (PropertyUtils.isWriteable(dst, name)) {
Object value = ((DynaBean)src).get(name);
Valorizer.set(dst, name, value, locale);
}
}
} else if (src instanceof Map) {
Iterator names = ((Map)src).keySet().iterator();
while (names.hasNext()) {
String name = (String)names.next();
if (PropertyUtils.isWriteable(dst, name)) {
Object value = ((Map)src).get(name);
Valorizer.set(dst, name, value, locale);
}
}
} else {
PropertyDescriptor descriptors[] = PropertyUtils.getPropertyDescriptors(src);
for (int i = 0; i < descriptors.length; i++) {
String name = descriptors[i].getName();
if (!"class".equals(name) && PropertyUtils.isReadable(src, name)
&& PropertyUtils.isWriteable(dst, name)) {
try {
Object value = PropertyUtils.getSimpleProperty(src, name);
Valorizer.set(dst, name, value, locale);
} catch (NoSuchMethodException nsme) {
logger.warn(nsme);
} catch (IllegalAccessException iae) {
logger.warn(iae);
} catch (InvocationTargetException ite) {
logger.warn(ite);
}
}
}
}
}
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