Java Code Examples for org.springframework.util.ObjectUtils#unwrapOptional()

/**
 * Switch the target object, replacing the cached introspection results only
 * if the class of the new object is different to that of the replaced object.
 * @param object the new target object
 * @param nestedPath the nested path of the object
 * @param rootObject the root object at the top of the path
 */
public void setWrappedInstance(Object object, @Nullable String nestedPath, @Nullable Object rootObject) {
	this.wrappedObject = ObjectUtils.unwrapOptional(object);
	Assert.notNull(this.wrappedObject, "Target object must not be null");
	this.nestedPath = (nestedPath != null ? nestedPath : "");
	this.rootObject = (!this.nestedPath.isEmpty() ? rootObject : this.wrappedObject);
	this.nestedPropertyAccessors = null;
	this.typeConverterDelegate = new TypeConverterDelegate(this, this.wrappedObject);
}
 

/**
 * Retrieve a Property accessor for the given nested property.
 * Create a new one if not found in the cache.
 * <p>Note: Caching nested PropertyAccessors is necessary now,
 * to keep registered custom editors for nested properties.
 * @param nestedProperty property to create the PropertyAccessor for
 * @return the PropertyAccessor instance, either cached or newly created
 */
private AbstractNestablePropertyAccessor getNestedPropertyAccessor(String nestedProperty) {
	if (this.nestedPropertyAccessors == null) {
		this.nestedPropertyAccessors = new HashMap<>();
	}
	// Get value of bean property.
	PropertyTokenHolder tokens = getPropertyNameTokens(nestedProperty);
	String canonicalName = tokens.canonicalName;
	Object value = getPropertyValue(tokens);
	if (value == null || (value instanceof Optional && !((Optional) value).isPresent())) {
		if (isAutoGrowNestedPaths()) {
			value = setDefaultValue(tokens);
		}
		else {
			throw new NullValueInNestedPathException(getRootClass(), this.nestedPath + canonicalName);
		}
	}

	// Lookup cached sub-PropertyAccessor, create new one if not found.
	AbstractNestablePropertyAccessor nestedPa = this.nestedPropertyAccessors.get(canonicalName);
	if (nestedPa == null || nestedPa.getWrappedInstance() != ObjectUtils.unwrapOptional(value)) {
		if (logger.isTraceEnabled()) {
			logger.trace("Creating new nested " + getClass().getSimpleName() + " for property '" + canonicalName + "'");
		}
		nestedPa = newNestedPropertyAccessor(value, this.nestedPath + canonicalName + NESTED_PROPERTY_SEPARATOR);
		// Inherit all type-specific PropertyEditors.
		copyDefaultEditorsTo(nestedPa);
		copyCustomEditorsTo(nestedPa, canonicalName);
		this.nestedPropertyAccessors.put(canonicalName, nestedPa);
	}
	else {
		if (logger.isTraceEnabled()) {
			logger.trace("Using cached nested property accessor for property '" + canonicalName + "'");
		}
	}
	return nestedPa;
}
 

/**
 * Switch the target object, replacing the cached introspection results only
 * if the class of the new object is different to that of the replaced object.
 * @param object the new target object
 * @param nestedPath the nested path of the object
 * @param rootObject the root object at the top of the path
 */
public void setWrappedInstance(Object object, @Nullable String nestedPath, @Nullable Object rootObject) {
	this.wrappedObject = ObjectUtils.unwrapOptional(object);
	Assert.notNull(this.wrappedObject, "Target object must not be null");
	this.nestedPath = (nestedPath != null ? nestedPath : "");
	this.rootObject = (!this.nestedPath.isEmpty() ? rootObject : this.wrappedObject);
	this.nestedPropertyAccessors = null;
	this.typeConverterDelegate = new TypeConverterDelegate(this, this.wrappedObject);
}
 

/**
 * Retrieve a Property accessor for the given nested property.
 * Create a new one if not found in the cache.
 * <p>Note: Caching nested PropertyAccessors is necessary now,
 * to keep registered custom editors for nested properties.
 * @param nestedProperty property to create the PropertyAccessor for
 * @return the PropertyAccessor instance, either cached or newly created
 */
private AbstractNestablePropertyAccessor getNestedPropertyAccessor(String nestedProperty) {
	if (this.nestedPropertyAccessors == null) {
		this.nestedPropertyAccessors = new HashMap<>();
	}
	// Get value of bean property.
	PropertyTokenHolder tokens = getPropertyNameTokens(nestedProperty);
	String canonicalName = tokens.canonicalName;
	Object value = getPropertyValue(tokens);
	if (value == null || (value instanceof Optional && !((Optional) value).isPresent())) {
		if (isAutoGrowNestedPaths()) {
			value = setDefaultValue(tokens);
		}
		else {
			throw new NullValueInNestedPathException(getRootClass(), this.nestedPath + canonicalName);
		}
	}

	// Lookup cached sub-PropertyAccessor, create new one if not found.
	AbstractNestablePropertyAccessor nestedPa = this.nestedPropertyAccessors.get(canonicalName);
	if (nestedPa == null || nestedPa.getWrappedInstance() != ObjectUtils.unwrapOptional(value)) {
		if (logger.isTraceEnabled()) {
			logger.trace("Creating new nested " + getClass().getSimpleName() + " for property '" + canonicalName + "'");
		}
		nestedPa = newNestedPropertyAccessor(value, this.nestedPath + canonicalName + NESTED_PROPERTY_SEPARATOR);
		// Inherit all type-specific PropertyEditors.
		copyDefaultEditorsTo(nestedPa);
		copyCustomEditorsTo(nestedPa, canonicalName);
		this.nestedPropertyAccessors.put(canonicalName, nestedPa);
	}
	else {
		if (logger.isTraceEnabled()) {
			logger.trace("Using cached nested property accessor for property '" + canonicalName + "'");
		}
	}
	return nestedPa;
}
 

@Nullable
private Object unwrapReturnValue(Object returnValue) {
	return ObjectUtils.unwrapOptional(returnValue);
}
 

@Nullable
private Object unwrapReturnValue(Object returnValue) {
	return ObjectUtils.unwrapOptional(returnValue);
}
 

/**
 * Create a new DataBinder instance.
 * @param target the target object to bind onto (or {@code null}
 * if the binder is just used to convert a plain parameter value)
 * @param objectName the name of the target object
 */
public DataBinder(@Nullable Object target, String objectName) {
	this.target = ObjectUtils.unwrapOptional(target);
	this.objectName = objectName;
}
 

/**
 * Create a new DataBinder instance.
 * @param target the target object to bind onto (or {@code null}
 * if the binder is just used to convert a plain parameter value)
 * @param objectName the name of the target object
 */
public DataBinder(@Nullable Object target, String objectName) {
	this.target = ObjectUtils.unwrapOptional(target);
	this.objectName = objectName;
}