javax.security.auth: static class: SubjectDomainCombiner.WeakKeyValueMap

javax.security.auth
static class: SubjectDomainCombiner.WeakKeyValueMap [javadoc | source]

java.lang.Object
   java.util.AbstractMap<K, V>
      java.util.WeakHashMap<V>
         javax.security.auth.SubjectDomainCombiner$WeakKeyValueMap

All Implemented Interfaces:
Map

A HashMap that has weak keys and values. Key objects in this map are the "current" ProtectionDomain instances received via the combine method. Each "current" PD is mapped to a new PD instance that holds both the contents of the "current" PD, as well as the principals from the Subject associated with this combiner. The newly created "principal-based" PD values must be stored as WeakReferences since they contain strong references to the corresponding key object (the "current" non-principal-based PD), which will prevent the key from being GC'd. Specifically, a "principal-based" PD contains strong references to the CodeSource, signer certs, PermissionCollection and ClassLoader objects in the "current PD".

Fields inherited from java.util.WeakHashMap:
table, modCount

Fields inherited from java.util.AbstractMap:
keySet, values

Method from javax.security.auth.SubjectDomainCombiner$WeakKeyValueMap Summary:
getValue, putValue

Methods from java.util.WeakHashMap:
clear, containsKey, containsValue, entrySet, get, getEntry, isEmpty, keySet, put, putAll, remove, removeMapping, resize, size, unmaskNull, values

Methods from java.util.AbstractMap:
clear, clone, containsKey, containsValue, entrySet, equals, get, hashCode, isEmpty, keySet, put, putAll, remove, size, toString, values

Methods from java.lang.Object:
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Method from javax.security.auth.SubjectDomainCombiner$WeakKeyValueMap Detail:
public V getValue(K key) { WeakReference< V > wr = super.get(key); if (wr != null) { return wr.get(); } return null; }
public V putValue(K key, V value) { WeakReference< V > wr = super.put(key, new WeakReference< V >(value)); if (wr != null) { return wr.get(); } return null; }

Method from javax.security.auth.SubjectDomainCombiner$WeakKeyValueMap Detail:

 public V getValue(K key) {
            WeakReference< V > wr = super.get(key);
            if (wr != null) {
                return wr.get();
            }
            return null;
}

 public V putValue(K key,
    V value) {
            WeakReference< V > wr = super.put(key, new WeakReference< V >(value));
            if (wr != null) {
                return wr.get();
            }
            return null;
}