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Java Source Code / Java Documentation » Byte Code » PROSE » ch.ethz.inf.iks.jvmai.jvmdi   Source Cross Reference   Class Diagram   Java Document (Java Doc)   java.lang.Object    ch.ethz.inf.iks.jvmai.jvmdi.HotSwapFieldWeaver HotSwapFieldWeaver public class HotSwapFieldWeaver (Code) Remembers the fields where a callback should be inserted. For each method that references the specified field, a callback is woven using the MethodWeaver class. author:    Angela Nicoara author:    Johann Gyger version:    $Id$ Field Summary final protected static  int FW_ACCESS_ENABLED      final protected static  int FW_MODIFICATION_ENABLED      final protected static  int FW_MODIFIED      final protected static  int FW_REGISTERED      final protected static  int FW_UNCHANGED      final protected static  int FW_WOVEN      protected static  Field fieldMap      Maps unique field ids to the field objects. protected static  UniqueIdArrayManager idMgr      Manages unique method ids. protected  String key      Unique identifiere string for the target of this weaver. protected  int status      Holds the state of the weaver. protected  Field target      Field bound to this weaver. protected  int targetId      Unique numerical identifier for {#link: #target target}, created with HotSwapFieldWeaver.createNewFieldId createNewFieldId() . protected static  Map weaverNames      Maps the string identifier for each field weaver to the weaver. protected static  Map weavers      Collection of all field weavers. Constructor Summary protected   HotSwapFieldWeaver(Field target)      Create a new field weaver. Method Summary public static  void commit()      Re-weave all modified f and activate them in the VM. static  int createNewFieldId(Field field)      Returns an identifier for method and stores the association, so that HotSwapFieldWeaver.idToMethod(int) idToMethod() may be used to get the method using the id. Note: only the id is unique, if createNewMethodId(Method) is called more than one time with the same argument, each call will create a new id and a new map entry. Parameters:   field - that will be associated with a new identifier. public  String debugString()      public  String getKey()      Returns a unique String identifier for the target field. public  Field getTarget()      Returns the target of this FieldWeaver. public  int getTargetId()      Returns the unique id of the target of this field. public static synchronized  HotSwapFieldWeaver getWeaver(Field target)      Get a unique field weaver for `target'. public static  Field idToField(int fieldId)      Returns the Method object associated to methodId or null, if methodID is not a valid id. The ids must be created with HotSwapFieldWeaver.createNewFieldId createNewFieldId() . Parameters:   fieldId - id for the Method that will be returned. public static  void resetAll()      Reset all field weavers. public  void setFieldAccessEnabled(boolean flag)      Enable field access join point. public  void setFieldModificationEnabled(boolean flag)      Enable field modification join point. protected  void weave()      Weave advice that are associated with the field in this weaver. Field Detail FW_ACCESS_ENABLED final protected static int FW_ACCESS_ENABLED(Code) FW_MODIFICATION_ENABLED final protected static int FW_MODIFICATION_ENABLED(Code) FW_MODIFIED final protected static int FW_MODIFIED(Code) FW_REGISTERED final protected static int FW_REGISTERED(Code) FW_UNCHANGED final protected static int FW_UNCHANGED(Code) FW_WOVEN final protected static int FW_WOVEN(Code) fieldMap protected static Field fieldMap(Code) Maps unique field ids to the field objects. idMgr protected static UniqueIdArrayManager idMgr(Code) Manages unique method ids. key protected String key(Code) Unique identifiere string for the target of this weaver. The format is ClassName#FieldName#JNISignature. status protected int status(Code) Holds the state of the weaver. target protected Field target(Code) Field bound to this weaver. targetId protected int targetId(Code) Unique numerical identifier for {#link: #target target}, created with HotSwapFieldWeaver.createNewFieldId createNewFieldId() . weaverNames protected static Map weaverNames(Code) Maps the string identifier for each field weaver to the weaver. weavers protected static Map weavers(Code) Collection of all field weavers. For each field there exists exactly one field weaver in the system. Constructor Detail HotSwapFieldWeaver protected HotSwapFieldWeaver(Field target)(Code) Create a new field weaver. Parameters:   target - target field for which callbacks will be woven Method Detail commit public static void commit()(Code) Re-weave all modified f and activate them in the VM. createNewFieldId static int createNewFieldId(Field field)(Code) Returns an identifier for method and stores the association, so that HotSwapFieldWeaver.idToMethod(int) idToMethod() may be used to get the method using the id. Note: only the id is unique, if createNewMethodId(Method) is called more than one time with the same argument, each call will create a new id and a new map entry. Parameters:   field - that will be associated with a new identifier. new identifier for method. debugString public String debugString()(Code) getKey public String getKey()(Code) Returns a unique String identifier for the target field. The format is ClassName#FieldName#JNISignature. String identifier for the target field. getTarget public Field getTarget()(Code) Returns the target of this FieldWeaver. Field getTargetId public int getTargetId()(Code) Returns the unique id of the target of this field. This is used as parameter for the advice callback function. int target's id getWeaver public static synchronized HotSwapFieldWeaver getWeaver(Field target)(Code) Get a unique field weaver for `target'. Parameters:   target - field that will be woven idToField public static Field idToField(int fieldId)(Code) Returns the Method object associated to methodId or null, if methodID is not a valid id. The ids must be created with HotSwapFieldWeaver.createNewFieldId createNewFieldId() . Parameters:   fieldId - id for the Method that will be returned. Method associated to methodID or null. throws:   ArrayOutOfBoundException - resetAll public static void resetAll()(Code) Reset all field weavers. setFieldAccessEnabled public void setFieldAccessEnabled(boolean flag)(Code) Enable field access join point. Parameters:   flag - enable/disable setFieldModificationEnabled public void setFieldModificationEnabled(boolean flag)(Code) Enable field modification join point. Parameters:   flag - enable/disable weave protected void weave() throws ClassNotFoundException(Code) Weave advice that are associated with the field in this weaver. The weaving is actually done by the MethodWeaver. This method only informs the MethodWeaver instances that are involved. throws:   java.lang.ClassNotFoundException - can not load the class definingthe field (this will only be thrown for private fields). 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)