org.jboss.cache.util
Class Util

java.lang.Object
  org.jboss.cache.util.Util

public final class Util
extends java.lang.Object

General utility methods used throughout the JBC code base.

Version:

$Revision: 7168 $

Author:

Brian Stansberry

Nested Class Summary

static class

Util.MapModifications Static inner class that holds 3 maps - for data added, removed and modified.

Method Summary

static Util.MapModifications	diffNodeData(java.util.Map<java.lang.Object,java.lang.Object> pre, java.util.Map<java.lang.Object,java.lang.Object> post) Calculates the diffs between data maps passed in to NodeModifiedEvent.getData() before and after modification.
static <T> T	getInstance(java.lang.Class<T> clazz)
static java.lang.Object	getInstance(java.lang.String classname)
static java.lang.Class	loadClass(java.lang.String classname) Loads the specified class using this class's classloader, or, if it is null (i.e. this class was loaded by the bootstrap classloader), the system classloader.
static boolean	safeEquals(java.lang.Object a, java.lang.Object b) Null-safe equality test.

Methods inherited from class java.lang.Object

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

Method Detail

loadClass

public static java.lang.Class loadClass(java.lang.String classname)
                                 throws java.lang.ClassNotFoundException

Loads the specified class using this class's classloader, or, if it is null (i.e. this class was loaded by the bootstrap classloader), the system classloader.

If loadtime instrumentation via GenerateInstrumentedClassLoader is used, this class may be loaded by the bootstrap classloader.

Parameters:

classname - name of the class to load

Returns:

the class

Throws:

java.lang.ClassNotFoundException

getInstance

public static <T> T getInstance(java.lang.Class<T> clazz)
                     throws java.lang.Exception

Throws:

java.lang.Exception

getInstance

public static java.lang.Object getInstance(java.lang.String classname)
                                    throws java.lang.Exception

Throws:

java.lang.Exception

diffNodeData

public static Util.MapModifications diffNodeData(java.util.Map<java.lang.Object,java.lang.Object> pre,
                                                 java.util.Map<java.lang.Object,java.lang.Object> post)

Calculates the diffs between data maps passed in to NodeModifiedEvent.getData() before and after modification. This only makes sense if the modification type is NodeModifiedEvent.ModificationType.PUT_MAP. Refer to NodeModifiedEvent and NodeModified.

Parameters:

pre - map of data before the node was modified

post - Map of data after the node was modified

Returns:

MapModifications containing the differences.

safeEquals

public static boolean safeEquals(java.lang.Object a,
                                 java.lang.Object b)

Null-safe equality test.

Parameters:

a - first object to compare

b - second object to compare

Returns:

true if the objects are equals or both null, false otherwise.