in src/main/java/org/apache/commons/beanutils2/BeanUtilsBean.java [757:909]
public void setProperty(final Object bean, String name, final Object value) throws IllegalAccessException, InvocationTargetException {
// Trace logging (if enabled)
if (LOG.isTraceEnabled()) {
final StringBuilder sb = new StringBuilder(" setProperty(");
sb.append(bean);
sb.append(", ");
sb.append(name);
sb.append(", ");
if (value == null) {
sb.append("<NULL>");
} else if (value instanceof String) {
sb.append((String) value);
} else if (value instanceof String[]) {
final String[] values = (String[]) value;
sb.append('[');
for (int i = 0; i < values.length; i++) {
if (i > 0) {
sb.append(',');
}
sb.append(values[i]);
}
sb.append(']');
} else {
sb.append(value.toString());
}
sb.append(')');
LOG.trace(sb.toString());
}
// Resolve any nested expression to get the actual target bean
Object target = bean;
final Resolver resolver = getPropertyUtils().getResolver();
while (resolver.hasNested(name)) {
try {
target = getPropertyUtils().getProperty(target, resolver.next(name));
if (target == null) { // the value of a nested property is null
return;
}
name = resolver.remove(name);
} catch (final NoSuchMethodException e) {
return; // Skip this property setter
}
}
if (LOG.isTraceEnabled()) {
LOG.trace(" Target bean = " + target);
LOG.trace(" Target name = " + name);
}
// Declare local variables we will require
final String propName = resolver.getProperty(name); // Simple name of target property
Class<?> type = null; // Java type of target property
final int index = resolver.getIndex(name); // Indexed subscript value (if any)
final String key = resolver.getKey(name); // Mapped key value (if any)
// Calculate the property type
if (target instanceof DynaBean) {
final DynaClass dynaClass = ((DynaBean) target).getDynaClass();
final DynaProperty dynaProperty = dynaClass.getDynaProperty(propName);
if (dynaProperty == null) {
return; // Skip this property setter
}
type = dynaPropertyType(dynaProperty, value);
if (index >= 0 && List.class.isAssignableFrom(type)) {
type = Object.class;
}
} else if (target instanceof Map) {
type = Object.class;
} else if (target != null && target.getClass().isArray() && index >= 0) {
type = Array.get(target, index).getClass();
} else {
PropertyDescriptor descriptor = null;
try {
descriptor = getPropertyUtils().getPropertyDescriptor(target, name);
if (descriptor == null) {
return; // Skip this property setter
}
} catch (final NoSuchMethodException e) {
return; // Skip this property setter
}
if (descriptor instanceof MappedPropertyDescriptor) {
if (((MappedPropertyDescriptor) descriptor).getMappedWriteMethod() == null) {
if (LOG.isDebugEnabled()) {
LOG.debug("Skipping read-only property");
}
return; // Read-only, skip this property setter
}
type = ((MappedPropertyDescriptor) descriptor).getMappedPropertyType();
} else if (index >= 0 && descriptor instanceof IndexedPropertyDescriptor) {
if (((IndexedPropertyDescriptor) descriptor).getIndexedWriteMethod() == null) {
if (LOG.isDebugEnabled()) {
LOG.debug("Skipping read-only property");
}
return; // Read-only, skip this property setter
}
type = ((IndexedPropertyDescriptor) descriptor).getIndexedPropertyType();
} else if (index >= 0 && List.class.isAssignableFrom(descriptor.getPropertyType())) {
type = Object.class;
} else if (key != null) {
if (descriptor.getReadMethod() == null) {
if (LOG.isDebugEnabled()) {
LOG.debug("Skipping read-only property");
}
return; // Read-only, skip this property setter
}
type = value == null ? Object.class : value.getClass();
} else {
if (descriptor.getWriteMethod() == null) {
if (LOG.isDebugEnabled()) {
LOG.debug("Skipping read-only property");
}
return; // Read-only, skip this property setter
}
type = descriptor.getPropertyType();
}
}
// Convert the specified value to the required type
Object newValue = null;
if (type.isArray() && index < 0) { // Scalar value into array
if (value == null) {
final String[] values = new String[1];
values[0] = null;
newValue = getConvertUtils().convert(values, type);
} else if (value instanceof String) {
newValue = getConvertUtils().convert(value, type);
} else if (value instanceof String[]) {
newValue = getConvertUtils().convert((String[]) value, type);
} else {
newValue = convert(value, type);
}
} else if (type.isArray()) { // Indexed value into array
if (value instanceof String || value == null) {
newValue = getConvertUtils().convert((String) value, type.getComponentType());
} else if (value instanceof String[]) {
newValue = getConvertUtils().convert(((String[]) value)[0], type.getComponentType());
} else {
newValue = convert(value, type.getComponentType());
}
} else if (value instanceof String) {
newValue = getConvertUtils().convert((String) value, type);
} else if (value instanceof String[]) {
newValue = getConvertUtils().convert(((String[]) value)[0], type);
} else {
newValue = convert(value, type);
}
// Invoke the setter method
try {
getPropertyUtils().setProperty(target, name, newValue);
} catch (final NoSuchMethodException e) {
throw new InvocationTargetException(e, "Cannot set " + propName);
}
}