Java Doc for JavaVersions.java in  » Database-ORM » openjpa » org » apache » openjpa » lib » util » Java Source Code / Java DocumentationJava Source Code and Java Documentation

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Java Source Code / Java Documentation » Database ORM » openjpa » org.apache.openjpa.lib.util   Source Cross Reference   Class Diagram   Java Document (Java Doc)   java.lang.Object    org.apache.openjpa.lib.util.JavaVersions JavaVersions public class JavaVersions (Code) Utilities for dealing with different Java spec versions. author:    Abe White Field Summary final public static  int VERSION      Java version; one of 2, 3, 4, 5, 6, or 7. Method Summary public static  Throwable getCause(Throwable ex)      Return the cause of the given throwable. public static  Class[] getParameterizedTypes(Field f)      Collects the parameterized type declarations for a given field. public static  Class[] getParameterizedTypes(Method meth)      Collects the parameterized return type declarations for a given method. public static  Class getVersionSpecificClass(Class base)      public static  Class getVersionSpecificClass(String base)      Obtains a subclass of the specific base class that is specific to the current version of Java in use. public static  Throwable initCause(Throwable ex, Throwable cause)      Set the cause of the given throwable. public static  boolean isAnnotation(Class cls)      Return true if the given type is an annotation. public static  boolean isEnumeration(Class cls)      Return true if the given type is an enumeration. public static  void main(String[] args)      public static  boolean transferStackTrace(Throwable from, Throwable to)      Transfer the stack from one throwable to another, or return false if it cannot be done, possibly due to an unsupported Java version. Field Detail VERSION final public static int VERSION(Code) Java version; one of 2, 3, 4, 5, 6, or 7. Method Detail getCause public static Throwable getCause(Throwable ex)(Code) Return the cause of the given throwable. getParameterizedTypes public static Class[] getParameterizedTypes(Field f)(Code) Collects the parameterized type declarations for a given field. getParameterizedTypes public static Class[] getParameterizedTypes(Method meth)(Code) Collects the parameterized return type declarations for a given method. getVersionSpecificClass public static Class getVersionSpecificClass(Class base)(Code) Returns a version-specific instance of the specified class Parameters:   base - the base class to check the JDK-version-specific version of the class See Also:   JavaVersions.getVersionSpecificClass(String) getVersionSpecificClass public static Class getVersionSpecificClass(String base) throws ClassNotFoundException(Code) Obtains a subclass of the specific base class that is specific to the current version of Java in use. The heuristic for the class name to load will be that OpenJPA first checks for the name of the class with the current setting of the JavaVersions.VERSION field, then each number in decreasing order, until ending in the unqualified name. For example, if we are using JDK 1.5.1, and we want to load "org.apache.openjpa.lib.SomeClass", we will try to load the following classes in order and return the first one that is successfully found and loaded: org.apache.openjpa.lib.SomeClass5 org.apache.openjpa.lib.SomeClass4 org.apache.openjpa.lib.SomeClass3 org.apache.openjpa.lib.SomeClass2 org.apache.openjpa.lib.SomeClass1 org.apache.openjpa.lib.SomeClass Parameters:   base - the base name of the class to load the subclass appropriate for the current Java version initCause public static Throwable initCause(Throwable ex, Throwable cause)(Code) Set the cause of the given throwable. isAnnotation public static boolean isAnnotation(Class cls)(Code) Return true if the given type is an annotation. isEnumeration public static boolean isEnumeration(Class cls)(Code) Return true if the given type is an enumeration. main public static void main(String[] args)(Code) transferStackTrace public static boolean transferStackTrace(Throwable from, Throwable to)(Code) Transfer the stack from one throwable to another, or return false if it cannot be done, possibly due to an unsupported Java version. Methods inherited from java.lang.Object native protected Object clone() throws CloneNotSupportedException(Code)(Java Doc) public boolean equals(Object obj)(Code)(Java Doc) protected void finalize() throws Throwable(Code)(Java Doc) final native public Class getClass()(Code)(Java Doc) native public int hashCode()(Code)(Java Doc) final native public void notify()(Code)(Java Doc) final native public void notifyAll()(Code)(Java Doc) public String toString()(Code)(Java Doc) final native public void wait(long timeout) throws InterruptedException(Code)(Java Doc) final public void wait(long timeout, int nanos) throws InterruptedException(Code)(Java Doc) final public void wait() throws InterruptedException(Code)(Java Doc)