import org.apache.commons.collections4.map.ReferenceMap; //导入依赖的package包/类
AbstractTransaction(String id, StorageAccessIF access) {
  this.id = id;
  this.access = access;
  this.mapping = access.getStorage().getMapping();

  // Map containing named queries
  this.querymap = new HashMap<String, QueryIF>();
  
  // Identity map - maintains the relationships between object
  // identities and the single(ton) instances used with the
  // transaction. This enforces the constraint that only one
  // instance per object identity should exist at a given time in a
  // transaction.
  
  // NOTE: Even though it's the keys that are garbage collected
  // there is a strict mapping between IdentityIF and PersistentIF
  // that lets us do this, i.e. the objects reference their
  // identities, so the identity will not be garbage collected as
  // long as the object is reachable.
  this.identity_map = new ReferenceMap<IdentityIF, PersistentIF>(AbstractReferenceMap.ReferenceStrength.HARD, AbstractReferenceMap.ReferenceStrength.SOFT);

  log.debug(getId() + ": Transaction created.");
  this.timestamp = System.currentTimeMillis();
}
 

import org.apache.commons.collections4.map.ReferenceMap; //导入依赖的package包/类
public ResourceClassLoader getCustomResourceClassLoader(Resource[] resources) throws IOException{

		if (ArrayUtil.isEmpty(resources))
			return this;

		String key = hash(resources);
		ResourceClassLoader rcl = (customCLs == null) ? null : customCLs.get(key);

		if (rcl != null)
			return rcl;
		
		resources = ResourceUtil.merge(this.getResources(), resources);
		rcl = new ResourceClassLoader(resources, getParent());

		if (customCLs == null)
			customCLs = new ReferenceMap<String,ResourceClassLoader>();

		customCLs.put(key, rcl);
		return rcl;
	}
 

import org.apache.commons.collections4.map.ReferenceMap; //导入依赖的package包/类
@SuppressWarnings("unchecked")
private ResourceManager() {
  // resources = new HashMap<String, IResource>();
  resources = new ReferenceMap(AbstractReferenceMap.ReferenceStrength.SOFT,
      AbstractReferenceMap.ReferenceStrength.SOFT, true);
  random = new SecureRandom();
}
 

import org.apache.commons.collections4.map.ReferenceMap; //导入依赖的package包/类
/**
 * Constructs a new {@code BasicRemotePeerRegistry} instance.
 */
@SuppressWarnings("unchecked")
public BasicRemotePeerRegistry() {
  backingStore = new RemotePeerReferenceMap(AbstractReferenceMap.ReferenceStrength.WEAK,
      AbstractReferenceMap.ReferenceStrength.WEAK, true);
  automationBackingStore = new ReferenceMap(AbstractReferenceMap.ReferenceStrength.WEAK,
      AbstractReferenceMap.ReferenceStrength.WEAK, true);
  automationIndices = new HashMap<>();
  setAutomationEnabled(true);
}
 

import org.apache.commons.collections4.map.ReferenceMap; //导入依赖的package包/类
public LocatorLookup(String qname, TransactionIF txn, TopicMapIF tm, int lrusize, E nullObject) {
  this.qname = qname;
  this.txn = txn;
  this.tm = tm;
  this.lrusize = lrusize;
  this.cache = new ReferenceMap<LocatorIF, E>(AbstractReferenceMap.ReferenceStrength.SOFT, AbstractReferenceMap.ReferenceStrength.HARD);
  this.lru = new LRUMap<LocatorIF, E>(lrusize);
  NULLOBJECT = nullObject;
}
 

import org.apache.commons.collections4.map.ReferenceMap; //导入依赖的package包/类
public QueryLookup(String qname, TransactionIF txn, int lrusize, V nullObject) {
   this.qname = qname;
   this.txn = txn;
   this.cache = new ReferenceMap(AbstractReferenceMap.ReferenceStrength.SOFT, AbstractReferenceMap.ReferenceStrength.HARD);
   this.lru = new LRUMap(lrusize);
NULLOBJECT = nullObject;
 }
 

import org.apache.commons.collections4.map.ReferenceMap; //导入依赖的package包/类
public PhysicalClassLoader getCustomClassLoader(Resource[] resources, boolean reload) throws IOException{
	if(ArrayUtil.isEmpty(resources)) return this;
	String key = hash(resources);
	
	if(reload && customCLs!=null) customCLs.remove(key);
	
	
	PhysicalClassLoader pcl=customCLs==null?null:customCLs.get(key);
	if(pcl!=null) return pcl; 
	pcl=new PhysicalClassLoader(config,getDirectory(),new ClassLoader[]{new ResourceClassLoader(resources,getParent())},true);
	if(customCLs==null)customCLs=new ReferenceMap<String,PhysicalClassLoader>();
	customCLs.put(key, pcl);
	return pcl;
}
 

import org.apache.commons.collections4.map.ReferenceMap; //导入依赖的package包/类
public ResourceClassLoader getCustomResourceClassLoader2(Resource[] resources) throws IOException{
	if(ArrayUtil.isEmpty(resources)) return this;
	String key = hash(resources);
	ResourceClassLoader rcl=customCLs==null?null:customCLs.get(key);
	if(rcl!=null) return rcl; 
	
	rcl=new ResourceClassLoader(resources,this);
	if(customCLs==null)customCLs=new ReferenceMap<String,ResourceClassLoader>();
	customCLs.put(key, rcl);
	return rcl;
}
 

import org.apache.commons.collections4.map.ReferenceMap; //导入依赖的package包/类
@SuppressWarnings("unchecked")
private Map<Serializable, IEntity> createContractStoreMap() {
  return new ReferenceMap(AbstractReferenceMap.ReferenceStrength.HARD, AbstractReferenceMap.ReferenceStrength.WEAK,
      true);
}
 

import org.apache.commons.collections4.map.ReferenceMap; //导入依赖的package包/类
private <K, V> Map<K, V> createSoftHashMap() {
  return new ReferenceMap<K, V>(AbstractReferenceMap.ReferenceStrength.SOFT, AbstractReferenceMap.ReferenceStrength.HARD);
}
 

import org.apache.commons.collections4.map.ReferenceMap; //导入依赖的package包/类
public Map<String,ProcMetaCollection> getProcedureColumnCache() {
	if(procedureColumnCache==null)
		procedureColumnCache=new ReferenceMap<String,ProcMetaCollection>();
	return procedureColumnCache;
}
 

import org.apache.commons.collections4.map.ReferenceMap; //导入依赖的package包/类
public BidiReferenceMap(AbstractReferenceMap.ReferenceStrength keyType, AbstractReferenceMap.ReferenceStrength valueType, int capacity, float loadFactor, boolean purgeValues){
super(new ReferenceMap<K,V>(keyType,valueType,capacity,loadFactor,purgeValues), 
	new ReferenceMap<V,K>(keyType,valueType,capacity,loadFactor,purgeValues),null);
   }
 

import org.apache.commons.collections4.map.ReferenceMap; //导入依赖的package包/类
/**
 * This implementation spares its clients from the unspecified, 
 * generally chaotic ordering provided by normally Struct , 
 * without incurring the increased cost associated with TreeMap. 
 * It can be used to produce a copy of a map that has the same order as the original
 * @param type
 * @param initialCapacity initial capacity - MUST be a power of two.
 */
public StructImpl(int type, int initialCapacity) {
	if(type==TYPE_WEAKED)	map=new SyncMap<Collection.Key, Object>(new WeakHashMapPro<Collection.Key,Object>(initialCapacity));
	else if(type==TYPE_SOFT)	map=new SyncMap<Collection.Key, Object>(new MapProWrapper<Collection.Key, Object>(new ReferenceMap<Collection.Key, Object>(HARD,SOFT,initialCapacity,0.75f),new SerializableObject()));
	else if(type==TYPE_LINKED)		map=new SyncMap<Collection.Key, Object>(new LinkedHashMapPro<Collection.Key,Object>(initialCapacity));
	else if(type==TYPE_LINKED_NOT_SYNC)		map=new LinkedHashMapPro<Collection.Key,Object>(initialCapacity);
	else 						map=MapFactory.getConcurrentMap(initialCapacity);
}