org.apache.sling.api.wrappers

Class CompositeValueMap

java.lang.Object

org.apache.sling.api.wrappers.CompositeValueMap

All Implemented Interfaces:

java.util.Map<java.lang.String,java.lang.Object>, ValueMap

public class CompositeValueMap
extends java.lang.Object
implements ValueMap

An implementation of the ValueMap based on two ValueMaps: - One containing the properties - Another one containing the defaults to use in case the properties map does not contain the values. In case you would like to avoid duplicating properties on multiple resources, you can use a CompositeValueMap to get a concatenated map of properties.

Since:

2.3 (Sling API Bundle 2.5.0)

Nested Class Summary

Nested classes/interfaces inherited from interface java.util.Map

java.util.Map.Entry<K,V>

Field Summary

Fields inherited from interface org.apache.sling.api.resource.ValueMap

EMPTY

Constructor Summary

Constructors

Constructor and Description
CompositeValueMap(ValueMap properties, ValueMap defaults) Constructor
CompositeValueMap(ValueMap properties, ValueMap defaults, boolean merge) Constructor

Method Summary

Modifier and Type	Method and Description
void	clear()
boolean	containsKey(java.lang.Object key)
boolean	containsValue(java.lang.Object value)
java.util.Set<java.util.Map.Entry<java.lang.String,java.lang.Object>>	entrySet()
java.lang.Object	get(java.lang.Object key)
<T> T	get(java.lang.String key, java.lang.Class<T> type) Get a named property and convert it into the given type.
<T> T	get(java.lang.String key, T defaultValue) Get a named property and convert it into the given type.
boolean	isEmpty()
java.util.Set<java.lang.String>	keySet()
java.lang.Object	put(java.lang.String aKey, java.lang.Object value)
void	putAll(java.util.Map<? extends java.lang.String,?> properties)
java.lang.Object	remove(java.lang.Object key)
int	size()
java.util.Collection<java.lang.Object>	values()

Methods inherited from class java.lang.Object

equals, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Methods inherited from interface java.util.Map

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

Constructor Detail

CompositeValueMap

public CompositeValueMap(ValueMap properties,
                         ValueMap defaults)

Constructor

Parameters:

properties - The ValueMap to read from

defaults - The default ValueMap to use as fallback

CompositeValueMap

public CompositeValueMap(ValueMap properties,
                         ValueMap defaults,
                         boolean merge)

Constructor

Parameters:

properties - The ValueMap to read from

defaults - The default ValueMap to use as fallback

merge - Merge flag - If true, getting a key would return the current property map's value (if available), even if the corresponding default does not exist. - If false, getting a key would return null if the corresponding default does not exist

Method Detail

get

public <T> T get(java.lang.String key,
                 java.lang.Class<T> type)

Get a named property and convert it into the given type. This method does not support conversion into a primitive type or an array of a primitive type. It should return null in this case.

Specified by:

get in interface ValueMap

Type Parameters:

T - The class of the type

Parameters:

key - The name of the property

type - The class of the type

Returns:

Return named value converted to type T or null if non existing or can't be converted.

get

public <T> T get(java.lang.String key,
                 T defaultValue)

Get a named property and convert it into the given type. This method does not support conversion into a primitive type or an array of a primitive type. It should return the default value in this case.

Implementation hint: In the past it was allowed to call this with a 2nd parameter being null. Therefore all implementations should internally call Map.get(Object) when the 2nd parameter has value null.

Specified by:

get in interface ValueMap

Type Parameters:

T - The expected type

Parameters:

key - The name of the property

defaultValue - The default value to use if the named property does not exist or cannot be converted to the requested type. The default value is also used to define the type to convert the value to. Must not be null. If you want to return null by default rather rely on ValueMap.get(String, Class).

Returns:

Return named value converted to type T or the default value if non existing or can't be converted.

size

public int size()

Specified by:

size in interface java.util.Map<java.lang.String,java.lang.Object>

isEmpty

public boolean isEmpty()

Specified by:

isEmpty in interface java.util.Map<java.lang.String,java.lang.Object>

containsKey

public boolean containsKey(java.lang.Object key)

Specified by:

containsKey in interface java.util.Map<java.lang.String,java.lang.Object>

containsValue

public boolean containsValue(java.lang.Object value)

Specified by:

containsValue in interface java.util.Map<java.lang.String,java.lang.Object>

get

public java.lang.Object get(java.lang.Object key)

Specified by:

get in interface java.util.Map<java.lang.String,java.lang.Object>

put

public java.lang.Object put(java.lang.String aKey,
                            java.lang.Object value)

Specified by:

put in interface java.util.Map<java.lang.String,java.lang.Object>

remove

public java.lang.Object remove(java.lang.Object key)

Specified by:

remove in interface java.util.Map<java.lang.String,java.lang.Object>

putAll

public void putAll(java.util.Map<? extends java.lang.String,?> properties)

Specified by:

putAll in interface java.util.Map<java.lang.String,java.lang.Object>

clear

public void clear()

Specified by:

clear in interface java.util.Map<java.lang.String,java.lang.Object>

keySet

public java.util.Set<java.lang.String> keySet()

Specified by:

keySet in interface java.util.Map<java.lang.String,java.lang.Object>

values

public java.util.Collection<java.lang.Object> values()

Specified by:

values in interface java.util.Map<java.lang.String,java.lang.Object>

entrySet

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

Specified by:

entrySet in interface java.util.Map<java.lang.String,java.lang.Object>