Package org.springframework.web.servlet.mvc.support

Class RedirectAttributesModelMap

java.lang.Object

java.util.AbstractMap<K,V>

java.util.HashMap<K,V>

java.util.LinkedHashMap<String,Object>

org.springframework.ui.ModelMap

org.springframework.web.servlet.mvc.support.RedirectAttributesModelMap

All Implemented Interfaces:

Serializable, Cloneable, Map<String,Object>, Model, RedirectAttributes

public class RedirectAttributesModelMap
extends ModelMap
implements RedirectAttributes

A ModelMap implementation of RedirectAttributes that formats values as Strings using a DataBinder. Also provides a place to store flash attributes so they can survive a redirect without the need to be embedded in the redirect URL.

Since:

3.1

Author:

Rossen Stoyanchev

See Also:

• Serialized Form

Nested Class Summary

Nested classes/interfaces inherited from class java.util.AbstractMap

AbstractMap.SimpleEntry<K extends Object,V extends Object>, AbstractMap.SimpleImmutableEntry<K extends Object,V extends Object>

Constructor Summary

Constructors

Constructor	Description
RedirectAttributesModelMap()	Default constructor without a DataBinder.
RedirectAttributesModelMap(DataBinder dataBinder)	Constructor with a DataBinder.

Method Summary

Modifier and Type	Method	Description
RedirectAttributesModelMap	addAllAttributes(Collection<?> attributeValues)	Copy all attributes in the supplied Collection into this Map, using attribute name generation for each element.
RedirectAttributesModelMap	addAllAttributes(Map<String,?> attributes)	Copy all attributes in the supplied Map into this Map.
RedirectAttributesModelMap	addAttribute(Object attributeValue)	Add the supplied attribute to this Map using a generated name.
RedirectAttributesModelMap	addAttribute(String attributeName, Object attributeValue)	Add the supplied attribute under the supplied name.
RedirectAttributes	addFlashAttribute(Object attributeValue)	Add the given flash storage using a generated name.
RedirectAttributes	addFlashAttribute(String attributeName, Object attributeValue)	Add the given flash attribute.
Map<String,Object>	asMap()	Return the current set of model attributes as a Map.
Map<String,?>	getFlashAttributes()	Return the attributes candidate for flash storage or an empty Map.
RedirectAttributesModelMap	mergeAttributes(Map<String,?> attributes)	Copy all attributes in the supplied Map into this Map, with existing objects of the same name taking precedence (i.e.
Object	put(String key, Object value)
void	putAll(Map<? extends String,? extends Object> map)

Methods inherited from class org.springframework.ui.ModelMap

containsAttribute, getAttribute

Methods inherited from class java.util.LinkedHashMap

clear, containsValue, entrySet, forEach, get, getOrDefault, keySet, removeEldestEntry, replaceAll, values

Methods inherited from class java.util.HashMap

clone, compute, computeIfAbsent, computeIfPresent, containsKey, isEmpty, merge, putIfAbsent, remove, remove, replace, replace, size

Methods inherited from class java.util.AbstractMap

equals, hashCode, toString

Methods inherited from class java.lang.Object

finalize, getClass, notify, notifyAll, wait, wait, wait

Methods inherited from interface java.util.Map

compute, computeIfAbsent, computeIfPresent, containsKey, equals, hashCode, isEmpty, merge, putIfAbsent, remove, remove, replace, replace, size

Methods inherited from interface org.springframework.ui.Model

containsAttribute, getAttribute

Constructor Details

RedirectAttributesModelMap

public RedirectAttributesModelMap()

Default constructor without a DataBinder. Attribute values are converted to String via AbstractMap.toString().

RedirectAttributesModelMap

public RedirectAttributesModelMap(@Nullable
 DataBinder dataBinder)

Constructor with a DataBinder.

Parameters:

dataBinder - used to format attribute values as Strings

Method Details

getFlashAttributes

public Map<String,?> getFlashAttributes()

Return the attributes candidate for flash storage or an empty Map.

Specified by:

getFlashAttributes in interface RedirectAttributes

addAttribute

public RedirectAttributesModelMap addAttribute(String attributeName,
 @Nullable
 Object attributeValue)

Add the supplied attribute under the supplied name.

Formats the attribute value as a String before adding it.

Specified by:

addAttribute in interface Model

Specified by:

addAttribute in interface RedirectAttributes

Overrides:

addAttribute in class ModelMap

Parameters:

attributeName - the name of the model attribute (never null)

attributeValue - the model attribute value (can be null)

addAttribute

public RedirectAttributesModelMap addAttribute(Object attributeValue)

Add the supplied attribute to this Map using a generated name.

Note: Empty Collections are not added to the model when using this method because we cannot correctly determine the true convention name. View code should check for null rather than for empty collections as is already done by JSTL tags.

Formats the attribute value as a String before adding it.

Specified by:

addAttribute in interface Model

Specified by:

addAttribute in interface RedirectAttributes

Overrides:

addAttribute in class ModelMap

Parameters:

attributeValue - the model attribute value (never null)

addAllAttributes

public RedirectAttributesModelMap addAllAttributes(@Nullable
 Collection<?> attributeValues)

Copy all attributes in the supplied Collection into this Map, using attribute name generation for each element.

Each attribute value is formatted as a String before being added.

Specified by:

addAllAttributes in interface Model

Specified by:

addAllAttributes in interface RedirectAttributes

Overrides:

addAllAttributes in class ModelMap

See Also:

• ModelMap.addAttribute(Object)

addAllAttributes

public RedirectAttributesModelMap addAllAttributes(@Nullable
 Map<String,?> attributes)

Copy all attributes in the supplied Map into this Map.

Each attribute value is formatted as a String before being added.

Specified by:

addAllAttributes in interface Model

Overrides:

addAllAttributes in class ModelMap

See Also:

• ModelMap.addAttribute(String, Object)

mergeAttributes

public RedirectAttributesModelMap mergeAttributes(@Nullable
 Map<String,?> attributes)

Copy all attributes in the supplied Map into this Map, with existing objects of the same name taking precedence (i.e. not getting replaced).

Each attribute value is formatted as a String before being merged.

Specified by:

mergeAttributes in interface Model

Specified by:

mergeAttributes in interface RedirectAttributes

Overrides:

mergeAttributes in class ModelMap

asMap

public Map<String,Object> asMap()

Description copied from interface: Model

Return the current set of model attributes as a Map.

Specified by:

asMap in interface Model

put

public Object put(String key,
 @Nullable
 Object value)

The value is formatted as a String before being added.

Specified by:

put in interface Map<String,Object>

Overrides:

put in class HashMap<String,Object>

putAll

public void putAll(@Nullable
 Map<? extends String,? extends Object> map)

Each value is formatted as a String before being added.

Specified by:

putAll in interface Map<String,Object>

Overrides:

putAll in class HashMap<String,Object>

addFlashAttribute

public RedirectAttributes addFlashAttribute(String attributeName,
 @Nullable
 Object attributeValue)

Description copied from interface: RedirectAttributes

Add the given flash attribute.

Specified by:

addFlashAttribute in interface RedirectAttributes

Parameters:

attributeName - the attribute name; never null

attributeValue - the attribute value; may be null

addFlashAttribute

public RedirectAttributes addFlashAttribute(Object attributeValue)

Description copied from interface: RedirectAttributes

Add the given flash storage using a generated name.

Specified by:

addFlashAttribute in interface RedirectAttributes

Parameters:

attributeValue - the flash attribute value; never null