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public class BeanWrapperImpl extends AbstractPropertyAccessor implements BeanWrapper {
@SuppressWarnings("unchecked")
private void setPropertyValue(PropertyTokenHolder tokens, PropertyValue pv) throws BeansException {
String propertyName = tokens.canonicalName;
String actualName = tokens.actualName;
if (tokens.keys != null) {
// Apply indexes and map keys: fetch value for all keys but the last one.
PropertyTokenHolder getterTokens = new PropertyTokenHolder();
getterTokens.canonicalName = tokens.canonicalName;
getterTokens.actualName = tokens.actualName;
getterTokens.keys = new String[tokens.keys.length - 1];
System.arraycopy(tokens.keys, 0, getterTokens.keys, 0, tokens.keys.length - 1);
Object propValue;
try {
propValue = getPropertyValue(getterTokens);
}
catch (NotReadablePropertyException ex) {
throw new NotWritablePropertyException(getRootClass(), this.nestedPath + propertyName,
"Cannot access indexed value in property referenced " +
"in indexed property path '" + propertyName + "'", ex);
}
// Set value for last key.
String key = tokens.keys[tokens.keys.length - 1];
if (propValue == null) {
throw new NullValueInNestedPathException(getRootClass(), this.nestedPath + propertyName,
"Cannot access indexed value in property referenced " +
"in indexed property path '" + propertyName + "': returned null");
}
else if (propValue.getClass().isArray()) {
PropertyDescriptor pd = getCachedIntrospectionResults().getPropertyDescriptor(actualName);
Class requiredType = propValue.getClass().getComponentType();
int arrayIndex = Integer.parseInt(key);
Object oldValue = null;
try {
if (isExtractOldValueForEditor()) {
oldValue = Array.get(propValue, arrayIndex);
}
Object convertedValue = convertIfNecessary(propertyName, oldValue, pv.getValue(), requiredType,
new PropertyTypeDescriptor(pd, new MethodParameter(pd.getReadMethod(), -1), requiredType));
Array.set(propValue, arrayIndex, convertedValue);
}
catch (IndexOutOfBoundsException ex) {
throw new InvalidPropertyException(getRootClass(), this.nestedPath + propertyName,
"Invalid array index in property path '" + propertyName + "'", ex);
}
}
else if (propValue instanceof List) {
PropertyDescriptor pd = getCachedIntrospectionResults().getPropertyDescriptor(actualName);
Class requiredType = GenericCollectionTypeResolver.getCollectionReturnType(
pd.getReadMethod(), tokens.keys.length);
List list = (List) propValue;
int index = Integer.parseInt(key);
Object oldValue = null;
if (isExtractOldValueForEditor() && index < list.size()) {
oldValue = list.get(index);
}
Object convertedValue = convertIfNecessary(propertyName, oldValue, pv.getValue(), requiredType,
new PropertyTypeDescriptor(pd, new MethodParameter(pd.getReadMethod(), -1), requiredType));
if (index < list.size()) {
list.set(index, convertedValue);
}
else if (index >= list.size()) {
for (int i = list.size(); i < index; i++) {
try {
list.add(null);
}
catch (NullPointerException ex) {
throw new InvalidPropertyException(getRootClass(), this.nestedPath + propertyName,
"Cannot set element with index " + index + " in List of size " +
list.size() + ", accessed using property path '" + propertyName +
"': List does not support filling up gaps with null elements");
}
}
list.add(convertedValue);
}
}
else if (propValue instanceof Map) {
//...
}
}
}
}
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