Class CaseInsensitiveMap

java.lang.Object

java.util.AbstractMap<String,Object>

org.apache.camel.util.CaseInsensitiveMap

All Implemented Interfaces:

Serializable, Map<String,Object>

public class CaseInsensitiveMap
extends AbstractMap<String,Object>
implements Serializable

A map that uses case insensitive keys, but preserves the original key cases.

The map uses a custom hash table with case-insensitive hashing and comparison, providing O(1) for get, put, containsKey and remove operations without allocating temporary strings. Entries are stored in insertion order.

This map is not designed to be thread safe as concurrent access to it is not supposed to be performed by the Camel routing engine.

See Also:

• Serialized Form

Nested Class Summary

Nested classes/interfaces inherited from class AbstractMap

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

Nested classes/interfaces inherited from interface Map

Map.Entry<K,V>

Constructor Summary

Constructors

Constructor	Description
CaseInsensitiveMap()
CaseInsensitiveMap(Map<? extends String, ?> map)

Method Summary

Modifier and Type	Method	Description
void	clear()
boolean	containsKey(Object key)
boolean	containsValue(Object value)
Set<Map.Entry<String,Object>>	entrySet()
Object	get(Object key)
boolean	isEmpty()
Object	put(String key, Object value)
void	putAll(Map<? extends String, ?> m)
static void	registerKnownKeys(Collection<String> keys)	Registers a set of well-known header key strings for deduplication.
Object	remove(Object key)
int	size()

Methods inherited from class AbstractMap

clone, equals, hashCode, keySet, toString, values

Methods inherited from class Object

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

Methods inherited from interface Map

compute, computeIfAbsent, computeIfPresent, forEach, getOrDefault, merge, putIfAbsent, remove, replace, replace, replaceAll

Constructor Details

CaseInsensitiveMap

public CaseInsensitiveMap()

CaseInsensitiveMap

public CaseInsensitiveMap(Map<? extends String, ?> map)

Method Details

registerKnownKeys

public static void registerKnownKeys(Collection<String> keys)

Registers a set of well-known header key strings for deduplication. When a key passed to put(String, Object) matches one of these strings (case-insensitive), the canonical reference from this set is stored instead of the caller's string, reducing memory when many map instances carry the same headers (e.g. deserialized exchanges).

This method is intended to be called once during framework startup.

get

public Object get(Object key)

Specified by:

get in interface Map<String,Object>

Overrides:

get in class AbstractMap<String,Object>

containsKey

public boolean containsKey(Object key)

Specified by:

containsKey in interface Map<String,Object>

Overrides:

containsKey in class AbstractMap<String,Object>

containsValue

public boolean containsValue(Object value)

Specified by:

containsValue in interface Map<String,Object>

Overrides:

containsValue in class AbstractMap<String,Object>

put

public Object put(String key,
 Object value)

Specified by:

put in interface Map<String,Object>

Overrides:

put in class AbstractMap<String,Object>

remove

public Object remove(Object key)

Specified by:

remove in interface Map<String,Object>

Overrides:

remove in class AbstractMap<String,Object>

size

public int size()

Specified by:

size in interface Map<String,Object>

Overrides:

size in class AbstractMap<String,Object>

isEmpty

public boolean isEmpty()

Specified by:

isEmpty in interface Map<String,Object>

Overrides:

isEmpty in class AbstractMap<String,Object>

clear

public void clear()

Specified by:

clear in interface Map<String,Object>

Overrides:

clear in class AbstractMap<String,Object>

putAll

public void putAll(Map<? extends String, ?> m)

Specified by:

putAll in interface Map<String,Object>

Overrides:

putAll in class AbstractMap<String,Object>

entrySet

public Set<Map.Entry<String,Object>> entrySet()

Specified by:

entrySet in interface Map<String,Object>

Specified by:

entrySet in class AbstractMap<String,Object>