Class ReadOnlyDictionary

java.lang.Object

java.util.Dictionary<String,Object>

org.apache.felix.scr.impl.helper.ReadOnlyDictionary

All Implemented Interfaces:

Comparable<ReadOnlyDictionary>, Map<String,Object>

public class ReadOnlyDictionary
extends Dictionary<String,Object>
implements Map<String,Object>, Comparable<ReadOnlyDictionary>

The ReadOnlyDictionary is both a Dictionary and a Map whose modification methods (like Dictionary.put(Object, Object), remove(Object), etc.) throw an UnsupportedOperationException.

Nested Class Summary

Nested classes/interfaces inherited from interface Map

Map.Entry<K,V>

Field Summary

Fields

Modifier and Type	Field	Description
private final Hashtable<String,Object>	m_delegate
private final org.osgi.framework.ServiceReference<?>	m_serviceReference

Constructor Summary

Constructors

Constructor	Description
ReadOnlyDictionary(Map<String,Object> delegate)	Creates a wrapper for the given delegate dictionary providing read only access to the data.
ReadOnlyDictionary(org.osgi.framework.ServiceReference<?> serviceReference)	Creates a wrapper for the given service reference providing read only access to the reference properties.

Method Summary

Modifier and Type	Method	Description
void	clear()
int	compareTo(ReadOnlyDictionary o)
boolean	containsKey(Object key)
boolean	containsValue(Object value)
Enumeration<Object>	elements()
Set<Map.Entry<String,Object>>	entrySet()
Object	get(Object key)
boolean	isEmpty()
Enumeration<String>	keys()
Set<String>	keySet()
Object	put(String key, Object value)	This method has no effect and always returns null as this instance is read-only and cannot modify and properties.
void	putAll(Map<? extends String, ? extends Object> m)
Object	remove(Object key)	This method has no effect and always returns null as this instance is read-only and cannot modify and properties.
int	size()
String	toString()
Collection<Object>	values()

Methods inherited from class Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait

Methods inherited from interface Map

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

Field Details

m_delegate

private final Hashtable<String,Object> m_delegate

m_serviceReference

private final org.osgi.framework.ServiceReference<?> m_serviceReference

Constructor Details

ReadOnlyDictionary

public ReadOnlyDictionary(Map<String,Object> delegate)

Creates a wrapper for the given delegate dictionary providing read only access to the data.

ReadOnlyDictionary

public ReadOnlyDictionary(org.osgi.framework.ServiceReference<?> serviceReference)

Creates a wrapper for the given service reference providing read only access to the reference properties.

Method Details

elements

public Enumeration<Object> elements()

Specified by:

elements in class Dictionary<String,Object>

get

public Object get(Object key)

Specified by:

get in interface Map<String,Object>

Specified by:

get in class Dictionary<String,Object>

isEmpty

public boolean isEmpty()

Specified by:

isEmpty in interface Map<String,Object>

Specified by:

isEmpty in class Dictionary<String,Object>

keys

public Enumeration<String> keys()

Specified by:

keys in class Dictionary<String,Object>

put

public Object put(String key,
 Object value)

This method has no effect and always returns null as this instance is read-only and cannot modify and properties.

Specified by:

put in interface Map<String,Object>

Specified by:

put in class Dictionary<String,Object>

remove

public Object remove(Object key)

This method has no effect and always returns null as this instance is read-only and cannot modify and properties.

Specified by:

remove in interface Map<String,Object>

Specified by:

remove in class Dictionary<String,Object>

size

public int size()

Specified by:

size in interface Map<String,Object>

Specified by:

size in class Dictionary<String,Object>

toString

public String toString()

Overrides:

toString in class Object

clear

public void clear()

Specified by:

clear in interface Map<String,Object>

containsKey

public boolean containsKey(Object key)

Specified by:

containsKey in interface Map<String,Object>

containsValue

public boolean containsValue(Object value)

Specified by:

containsValue in interface Map<String,Object>

entrySet

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

Specified by:

entrySet in interface Map<String,Object>

keySet

public Set<String> keySet()

Specified by:

keySet in interface Map<String,Object>

putAll

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

Specified by:

putAll in interface Map<String,Object>

values

public Collection<Object> values()

Specified by:

values in interface Map<String,Object>

compareTo

public int compareTo(ReadOnlyDictionary o)

Specified by:

compareTo in interface Comparable<ReadOnlyDictionary>