Examples of IdentityMap

com.esotericsoftware.kryo.util.IdentityMap
An unordered map that uses identity comparison for keys. This implementation is a cuckoo hash map using 3 hashes, random walking, and a small stash for problematic keys. Null keys are not allowed. Null values are allowed. No allocation is done except when growing the table size.

This map performs very fast get, containsKey, and remove (typically O(1), worst case O(log(n))). Put may be a bit slower, depending on hash collisions. Load factors greater than 0.91 greatly increase the chances the map will have to rehash to the next higher POT size. @author Nathan Sweet
com.go.trove.util.IdentityMap
An IdentityMap is like WeakHashMap, except it uses a key's identity hashcode and equals methods. IdentityMap is not thread-safe and must be wrapped with Collections.synchronizedMap to be made thread-safe. Most of the implementation for this class is ripped off from java.util.HashMap, but not java.util.WeakHashMap, in order to acheive greater efficiency.
The documentation for WeakHashMap states that it is intended primarily for use with key objects whose equals methods test for object identity using the == operator. Because WeakHashMap uses a key's own equals and hashcode methods, it is better suited for implementing methods that behave like {@link String#intern}. However, because WeakHashMap stongly references values, {@link Utils#intern Utils.intern} provides a safer intern mechanism.
In this implementation, all key objects are tested for equality using the == operator, and null keys are not permitted. IdentityMap is therefore better suited for "canonicalized" mappings.
Note: Weakly referenced entries may be automatically removed during either accessor or mutator operations, possibly causing a concurrent modification to be detected. Therefore, even if multiple threads are only accessing this map, be sure to synchronize this map first. Also, do not rely on the value returned by size() when using an iterator from this map. The iterators may return less entries than the amount reported by size(). @author Brian S O'Neill @version 19 , 00/12/18 @see java.util.WeakHashMap @see java.util.HashMap
eu.stratosphere.pact.compiler.util.IdentityMap
org.apache.commons.collections.map.IdentityMap
A Map implementation that matches keys and values based on == not equals().
This map will violate the detail of various Map and map view contracts. As a general rule, don't compare this map to other maps.
Note that IdentityMap is not synchronized and is not thread-safe. If you wish to use this map from multiple threads concurrently, you must use appropriate synchronization. The simplest approach is to wrap this map using {@link java.util.Collections#synchronizedMap(Map)}. This class may throw exceptions when accessed by concurrent threads without synchronization. @since Commons Collections 3.0 @version $Revision: 646777 $ $Date: 2008-04-10 13:33:15 +0100 (Thu, 10 Apr 2008) $ @author java util HashMap @author Stephen Colebourne
org.apache.flink.compiler.util.IdentityMap
org.apache.lenya.transaction.IdentityMap
Identity map. @version $Id: IdentityMap.java 473861 2006-11-12 03:51:14Z gregor $
org.castor.core.util.IdentityMap
An IdentityMap that uses reference-equality instead of object-equality. According to its special function it violates some design contracts of the Map interface. @author Ralf Joachim @version $Revision: 7491 $ $Date: 2006-04-13 10:49:49 -0600 (Thu, 13 Apr 2006) $ @since 0.9.9
org.eclipse.core.internal.databinding.identity.IdentityMap
A {@link Map} whose keys are added, removed and compared by identity. Thekeys in the map are compared using == instead of {@link #equals(Object)}.
This class is not a strict implementation the {@link Map} interface.It intentionally violates the {@link Map} contract, which requires the use of{@link #equals(Object)} when comparing keys. @since 1.2
org.eclipse.persistence.internal.identitymaps.IdentityMap

Purpose: Provides the interface for IdentityMap interaction.
Responsibilities: Provides access to all of the public interface for the EclipseLink IdentityMaps. This interface can be used if implementing custom identity maps that are radically different than the stock IdentityMaps otherwise simply extending the appropriate IdentityMap implementation is the best approach. @see CacheKey @since EclipseLink 1.0M7

Examples of org.eclipse.persistence.internal.identitymaps.IdentityMap


     * @return HashMap
     */
    private HashMap buildLowlevelDetailsFor(String mappedClassName) {
        Class mappedClass = (Class)getSession().getDatasourcePlatform().getConversionManager().convertObject(mappedClassName, ClassConstants.CLASS);
        IdentityMap identityMap = getSession().getIdentityMapAccessorInstance().getIdentityMap(mappedClass);
        ClassDescriptor descriptor = getSession().getProject().getDescriptor(mappedClass);


        String cacheType = getCacheTypeFor(identityMap.getClass());
        String configuredSize = "" + identityMap.getMaxSize();
        String currentSize = "";


        //show the current size, including subclasses 
        currentSize = "" + identityMap.getSize(mappedClass, true);


        String parentClassName = "";


        boolean isChildDescriptor = descriptor.isChildDescriptor();

View Full Code Here

Examples of org.eclipse.persistence.internal.identitymaps.IdentityMap


     * @return HashMap
     */
    private ClassSummaryDetail buildLowlevelDetailsForNew(String mappedClassName) {
        Class mappedClass = (Class)getSession().getDatasourcePlatform().getConversionManager().convertObject(mappedClassName, ClassConstants.CLASS);
        IdentityMap identityMap = getSession().getIdentityMapAccessorInstance().getIdentityMap(mappedClass);
        ClassDescriptor descriptor = getSession().getProject().getDescriptor(mappedClass);


        String cacheType = getCacheTypeFor(identityMap.getClass());
        String configuredSize = "" + identityMap.getMaxSize();
        String currentSize = "";


        //show the current size, including subclasses 
        currentSize = "" + identityMap.getSize(mappedClass, true);


        String parentClassName = "";


        boolean isChildDescriptor = descriptor.isChildDescriptor();

View Full Code Here

Examples of org.eclipse.persistence.internal.identitymaps.IdentityMap

    * @param className the fully qualified classname identifying the identity map
    * @exception  thrown then the IdentityMap for that class name could not be found
    */
    public void printObjectsInIdentityMap(String className) throws ClassNotFoundException {
        Class classWithMap = (Class)getSession().getDatasourcePlatform().getConversionManager().convertObject(className, ClassConstants.CLASS);
        IdentityMap map = getSession().getIdentityMapAccessorInstance().getIdentityMap(classWithMap);


        //check if the identity map exists
        if (null == map) {
            ((AbstractSession)session).log(SessionLog.INFO, SessionLog.SERVER, "jmx_mbean_runtime_services_identity_map_non_existent", className);
            return;
        }


        //check if there are any objects in the identity map. Print if so.
        Enumeration objects = map.keys();
        if (!objects.hasMoreElements()) {
            ((AbstractSession)session).log(SessionLog.INFO, SessionLog.SERVER, "jmx_mbean_runtime_services_identity_map_empty", className);
        }


        CacheKey cacheKey;

View Full Code Here

Examples of org.eclipse.persistence.internal.identitymaps.IdentityMap


        //get each identity map, and log the type
        for (int index = 0; index < classesRegistered.size(); index++) {
            registeredClassName = (String)classesRegistered.elementAt(index);
            registeredClass = (Class)getSession().getDatasourcePlatform().getConversionManager().convertObject(registeredClassName, ClassConstants.CLASS);
            IdentityMap map = getSession().getIdentityMapAccessorInstance().getIdentityMap(registeredClass);
            ((AbstractSession)session).log(SessionLog.INFO, SessionLog.SERVER, "jmx_mbean_runtime_services_identity_map_class", 
                    registeredClassName, map.getClass());
        }
    }

View Full Code Here

0 1 2 3 4 5

TOP

All source code are property of their respective owners. Java is a trademark of Sun Microsystems, Inc and owned by ORACLE Inc. Contact coftware#gmail.com.