/*
* @(#)file SnmpVarBindList.java
* @(#)author Sun Microsystems, Inc.
* @(#)version 1.4
* @(#)date 05/08/26
*
* Copyright 2004 Sun Microsystems, Inc. All rights reserved.
* SUN PROPRIETARY/CONFIDENTIAL. Use is subject to license terms.
*
*/
// Copyright (c) 1995-96 by Cisco Systems, Inc.
package com.sun.jmx.snmp;
import java.util.Vector;
import java.util.Enumeration;
/**
* Contains a list of <CODE>SnmpVarBind</CODE> objects.
* This class helps to create an <CODE>SnmpVarBindList</CODE> from a list of MIB variable names.
* In addition, it contains different forms of methods which can copy or clone the list.
* This list is required by any SNMP entity which specifies a list of variables to query.
* <p><b>This API is a Sun Microsystems internal API and is subject
* to change without notice.</b></p>
*/
public class SnmpVarBindList extends Vector {
/**
* A name given to the <CODE>SnmpVarBindList</CODE>. Useful for debugging.
* The default name is "VarBindList".
*/
public String identity = "VarBindList " ; // name identifying this list.
/**
* Timestamp when this <CODE>SnmpVarBindList</CODE> was updated.
* Valid only for <CODE>SnmpGet</CODE> and <CODE>SnmpGetNext</CODE> operations.
* <CODE>SnmpTimestamp</CODE> is null by default.
* Also, when the list is cloned without value the timestamp is not copied.
*/
Timestamp timestamp ;
// CONSTRUCTORS
//-------------
/**
* Prepares an empty list.
* The initial capacity and the capacity increment are initialized to 5.
*/
public SnmpVarBindList() {
super(5, 5) ;
}
/**
* Prepares an empty list.
* @param initialCapacity The initial capacity of the <CODE>SnmpVarBindList</CODE>.
*/
public SnmpVarBindList(int initialCapacity) {
super(initialCapacity) ;
}
/**
* Prepares an empty list with a <CODE>String</CODE> to print while debugging.
* @param name The name of the newly created <CODE>SnmpVarBindList</CODE>.
*/
public SnmpVarBindList(String name) {
super(5, 5) ;
identity = name ;
}
/**
* Similar to the copy constructor. Does a shallow copy of the elements.
* Individual elements are not cloned.
* @param list The <CODE>SnmpVarBindList</CODE> to copy.
*/
public SnmpVarBindList(SnmpVarBindList list) {
super(list.size(), 5) ;
list.copyInto(elementData) ;
elementCount = list.size() ;
}
/**
* Creates a new <CODE>SnmpVarBindList</CODE> object from a plain vector of <CODE>SnmpVarBind</CODE> objects.
* Objects in the specified vector can be <CODE>SnmpVarBind</CODE> objects or derivatives.
* @param list The vector of <CODE>SnmpVarBind</CODE> objects to copy.
*/
public SnmpVarBindList(Vector list) {
super(list.size(), 5);
for (Enumeration e = list.elements(); e.hasMoreElements();) {
final SnmpVarBind varBind = (SnmpVarBind)e.nextElement();
addElement((SnmpVarBind)varBind.clone());
}
}
/**
* Creates a new <CODE>SnmpVarBindList</CODE> object from a plain vector of <CODE>SnmpVarBind</CODE> objects.
* Objects in the specified vector can be <CODE>SnmpVarBind</CODE> objects or derivatives.
* @param name The name of the newly created <CODE>SnmpVarBindList</CODE>.
* @param list The vector of <CODE>SnmpVarBind</CODE> objects to copy.
*/
public SnmpVarBindList(String name, Vector list) {
this(list);
identity = name;
}
// GETTER/SETTER
//--------------
/**
* Gets the <CODE>timestamp</CODE> associated with this <CODE>SnmpVarBindList</CODE>.
* @return The <CODE>timestamp</CODE>.
*/
public Timestamp getTimestamp() {
return timestamp ;
}
/**
* Records the <CODE>sysUpTime</CODE> and the actual time when this <CODE>SnmpVarBindList</CODE>
* was changed or created.
* This needs to be set explicitly.
* @param tstamp The <CODE>SnmpTimestamp</CODE> of the device for which the values hold <CODE>true</CODE>.
*/
public void setTimestamp(Timestamp tstamp) {
timestamp = tstamp ;
}
/**
* Gets an <CODE>SnmpVarBind</CODE> object.
* @param pos The position in the list.
* @return The <CODE>SnmpVarBind</CODE> object at the specified position.
* @exception java.lang.ArrayIndexOutOfBoundsException If the specified <CODE>pos</CODE> is beyond range.
*/
public final synchronized SnmpVarBind getVarBindAt(int pos) {
return (SnmpVarBind)(elementAt(pos)) ;
}
/**
* Gets the number of elements in this list.
* @return The number of elements in the list.
*/
public synchronized int getVarBindCount() {
return size() ;
}
/**
* This is a convenience function that returns an enumeration. This can be used to traverse the list.
* This is advantageous as it hides the implementation of the class of the list which keeps the variables.
* @return An enumeration object of <CODE>SnmpVarBind</CODE> objects.
*/
public synchronized Enumeration getVarBindList() {
return elements() ;
}
/**
* Replaces the current variable binding list of <CODE>SnmpVarBind</CODE> with the new specified variable binding
* list of <CODE>SnmpVarBind</CODE> objects.
* This method only clones the vector. It does not clone the <CODE>SnmpVarBind</CODE> objects
* contained in the list.
* @param list A vector of <CODE>SnmpVarBind</CODE> objects.
*/
public final synchronized void setVarBindList(Vector list) {
setVarBindList(list, false) ;
}
/**
* Replaces the current variable binding list of <CODE>SnmpVarBind</CODE> objects with the new variable binding
* list of <CODE>SnmpVarBind</CODE> objects.
* If <CODE>copy</CODE> is <CODE>true</CODE>, it will clone each <CODE>SnmpVarBind</CODE> object
* contained in the list.
* @param list A vector of <CODE>SnmpVarBind</CODE> objects.
* @param copy The flag indicating whether each object in the list should be cloned.
*/
public final synchronized void setVarBindList(Vector list, boolean copy) {
synchronized (list) {
final int max = list.size();
setSize(max) ;
list.copyInto(this.elementData) ;
if (copy) { // do deepcopy of all vars.
for (int i = 0; i < max ; i++) {
SnmpVarBind avar = (SnmpVarBind)elementData[i] ;
elementData[i] = avar.clone() ;
}
}
}
}
// PUBLIC METHODS
//---------------
/**
* Appends an <CODE>SnmpVarBindList</CODE> at the end of the current <CODE>SnmpVarBindList</CODE> object.
* @param list The <CODE>SnmpVarBindList</CODE> to append.
*/
public synchronized void addVarBindList(SnmpVarBindList list) {
ensureCapacity(list.size() + size()) ;
for (int i = 0; i < list.size(); i++) {
addElement(list.getVarBindAt(i)) ;
}
}
/**
* Removes all the <CODE>SnmpVarBind</CODE> objects of the given <CODE>SnmpVarBindList</CODE> from the existing
* <CODE>SnmpVarBindList</CODE>.
* @param list The <CODE>SnmpVarBindList</CODE> to be removed.
* @return <CODE>true</CODE> if all the <CODE>SnmpVarBind</CODE> objects were components of this
* <CODE>SnmpVarBindList</CODE>, <CODE>false</CODE> otherwise.
*/
public synchronized boolean removeVarBindList(SnmpVarBindList list) {
boolean result = true;
for (int i = 0; i < list.size(); i++) {
result = removeElement(list.getVarBindAt(i)) ;
}
return result;
}
/**
* Replaces an element at a specified location with the new element.
* @param var The replacement variable.
* @param pos The location in the <CODE>SnmpVarBindList</CODE>.
* @exception java.lang.ArrayIndexOutOfBoundsException If the specified <CODE>pos</CODE> is beyond range.
*/
public final synchronized void replaceVarBind(SnmpVarBind var, int pos) {
setElementAt(var, pos) ;
}
/**
* Prepares a vector of <CODE>SnmpVarBindList</CODE> from an array of SNMP MIB variables and instances.
* @param list An array of <CODE>String</CODE> containing MIB variable names.
* @param inst A common instance for each of the MIB variables in <CODE>vlist</CODE>.
* @exception SnmpStatusException An error occurred while accessing a MIB node.
*/
public final synchronized void addVarBind(String list[], String inst) throws SnmpStatusException {
for (int i = 0; i < list.length; i++) {
SnmpVarBind avar = new SnmpVarBind(list[i]) ;
avar.addInstance(inst) ;
addElement(avar) ;
}
}
/**
* Removes the array of SNMP MIB variables and instances from the existing <CODE>SnmpVarBindList</CODE>.
* @param list An array of <CODE>String</CODE> containing MIB variable names.
* @param inst A common instance for each of the MIB variables in <CODE>vlist</CODE>.
* @return <CODE>true</CODE> if all the SNMP MIB variables were components of this <CODE>SnmpVarBindList</CODE>,
* <CODE>false</CODE> otherwise.
* @exception SnmpStatusException An error occurred while accessing a MIB node.
*/
public synchronized boolean removeVarBind(String list[], String inst) throws SnmpStatusException {
boolean result = true;
for (int i = 0; i < list.length; i++) {
SnmpVarBind avar = new SnmpVarBind(list[i]) ;
avar.addInstance(inst) ;
int indexOid = indexOfOid(avar) ;
try {
removeElementAt(indexOid) ;
} catch (ArrayIndexOutOfBoundsException e) {
result = false ;
}
}
return result ;
}
/**
* Adds an array of MIB variable names to the list. For example:
* <P>
* <CODE>
* String mylist[] = {"sysUpTime.0", "ifInOctets.0"}
* <BR>
* vb.addVarBind(mylist) ;
* </BR>
* </CODE>
* @param list The array of MIB variable names.
* @exception SnmpStatusException An error occurred while accessing a MIB node.
*/
public synchronized void addVarBind(String list[]) throws SnmpStatusException {
addVarBind(list, null) ;
}
/**
* Removes the array of SNMP MIB variables from the existing <CODE>SnmpVarBindList</CODE>.
* @param list Array of strings containing MIB variable names.
* @return <CODE>true</CODE> if all the SNMP MIB variables were components of this <CODE>SnmpVarBindList</CODE>,
* <CODE>false</CODE> otherwise.
* @exception SnmpStatusException An error occurred while accessing a MIB node.
*/
public synchronized boolean removeVarBind(String list[]) throws SnmpStatusException {
return removeVarBind(list, null) ;
}
/**
* Creates an <CODE>SnmpVarBind</CODE> object from the given MIB variable and appends it to the existing
* <CODE>SnmpVarBindList</CODE>.
* It creates a new <CODE>SnmpVarBindList</CODE> if one did not exist.
* @param name A MIB variable name.
* @exception SnmpStatusException An error occurred while accessing a MIB node.
*/
public synchronized void addVarBind(String name) throws SnmpStatusException {
SnmpVarBind avar ;
avar = new SnmpVarBind(name) ;
addVarBind(avar) ;
}
/**
* Removes the <CODE>SnmpVarBind</CODE> object corresponding to the given MIB variable from the existing
* <CODE>SnmpVarBindList</CODE>.
* @param name A MIB variable name.
* @return <CODE>true</CODE> if the SNMP MIB variable was a component of this <CODE>SnmpVarBindList</CODE>,
* <CODE>false</CODE> otherwise.
* @exception SnmpStatusException An error occurred while accessing a MIB node.
*/
public synchronized boolean removeVarBind(String name) throws SnmpStatusException {
SnmpVarBind avar ;
int indexOid ;
avar = new SnmpVarBind(name) ;
indexOid = indexOfOid(avar) ;
try {
removeElementAt(indexOid) ;
return true ;
} catch (ArrayIndexOutOfBoundsException e) {
return false ;
}
}
/**
* Appends the given <CODE>SnmpVarBind</CODE> object to the existing <CODE>SnmpVarBindList</CODE>.
* It creates a new <CODE>SnmpVarBindList</CODE> if one did not exist.
* @param var The <CODE>SnmpVarBind</CODE> object to be appended.
*/
public synchronized void addVarBind(SnmpVarBind var) {
addElement(var) ;
}
/**
* Removes the given <CODE>SnmpVarBind</CODE> object from the existing <CODE>SnmpVarBindList</CODE>.
* @param var The <CODE>SnmpVarBind</CODE> object to be removed.
* @return <CODE>true</CODE> if the <CODE>SnmpVarBind</CODE> object was a component of this
* <CODE>SnmpVarBindList</CODE>, <CODE>false</CODE> otherwise.
*/
public synchronized boolean removeVarBind(SnmpVarBind var) {
return removeElement(var) ;
}
/**
* Adds the string as an instance part to all OIDs in this list.
* This method should be used with caution because it affects all OIDs in the list.
* @param inst The <CODE>String</CODE> to add as an instance part.
* @exception SnmpStatusException An error occurred while accessing a MIB node.
*/
public synchronized void addInstance(String inst) throws SnmpStatusException {
int max= size();
for (int i = 0; i < max; i++) {
((SnmpVarBind)elementData[i]).addInstance(inst) ;
}
}
/**
* Adds elements in the specified <CODE>SnmpVarBindList</CODE> to this list.
* The elements are not cloned.
* @param list A vector of <CODE>SnmpVarBind</CODE>.
*/
final public synchronized void concat(Vector list) {
ensureCapacity(size() + list.size()) ;
for (Enumeration e = list.elements() ; e.hasMoreElements() ; ) {
addElement(e.nextElement()) ;
}
}
/**
* Returns <CODE>false</CODE> if any of the variables does not contain a valid value.
* Typically used for <CODE>SnmpSet</CODE> operations.
* @return <CODE>false</CODE> if any of the variables does not contain a valid value, <CODE>true</CODE> otherwise.
*/
public synchronized boolean checkForValidValues() {
int max= this.size();
for (int i = 0; i < max ; i++) {
SnmpVarBind avar = (SnmpVarBind)elementData[i] ;
if (avar.isValidValue() == false)
return false ;
}
return true ;
}
/**
* Returns <CODE>true</CODE> if there is a value that is not specified.
* @return <CODE>true</CODE> if there is a value that is not specified, <CODE>false</CODE> otherwise.
*/
public synchronized boolean checkForUnspecifiedValue() {
int max= this.size();
for (int i = 0; i < max ; i++) {
SnmpVarBind avar = (SnmpVarBind)elementData[i] ;
if (avar.isUnspecifiedValue())
return true ;
}
return false ;
}
/**
* Splits the <CODE>SnmpVarBindList</CODE>.
* @param pos The position at which to split the <CODE>SnmpVarBindList</CODE>
* @return The <CODE>SnmpVarBindList</CODE> list from the beginning up to the split position.
*/
public synchronized SnmpVarBindList splitAt(int pos) {
SnmpVarBindList splitVb = null ;
if (pos > elementCount)
return splitVb ;
splitVb = new SnmpVarBindList() ; // size() - atPosition) ;
int max= size();
for (int i = pos; i < max ; i++)
splitVb.addElement(elementData[i]) ;
elementCount = pos ;
trimToSize() ;
return splitVb ;
}
/**
* Gives the index of an OID in the <CODE>SnmpVarBindList</CODE>.
* The index returned must be greater than or equal to the <CODE>start</CODE> parameter
* and smaller than the <CODE>end</CODE> parameter. Otherwise the method returns -1.
* @param var The <CODE>SnmpVarBind</CODE> object with the requested OID.
* @param min The min index in <CODE>SnmpVarBindList</CODE>.
* @param max The max index in <CODE>SnmpVarBindList</CODE>.
* @return The index of the OID in <CODE>SnmpVarBindList</CODE>.
*/
public synchronized int indexOfOid(SnmpVarBind var, int min, int max) {
SnmpOid oidarg = var.getOid() ;
for (int i = min; i < max ; i++) {
SnmpVarBind avar = (SnmpVarBind)elementData[i] ;
if (oidarg.equals(avar.getOid()))
return i ;
}
return -1 ;
}
/**
* Gives the index of an OID in the <CODE>SnmpVarBindList</CODE>.
* @param var The <CODE>SnmpVarBind</CODE> object with the requested OID.
* @return The index of the OID in <CODE>SnmpVarBindList</CODE>.
*/
public synchronized int indexOfOid(SnmpVarBind var) {
return indexOfOid(var, 0, size()) ;
}
/**
* Gives the index of an OID in the <CODE>SnmpVarBindList</CODE>.
* @param oid The <CODE>SnmpOid</CODE> object with the requested OID.
* @return The index of the OID in <CODE>SnmpVarBindList</CODE>.
*/
public synchronized int indexOfOid(SnmpOid oid) {
int max = size();
for (int i = 0; i < max ; i++) {
SnmpVarBind avar = (SnmpVarBind)elementData[i] ;
if (oid.equals(avar.getOid()))
return i ;
}
return -1 ;
}
/**
* Clones the <CODE>SnmpVarBindList</CODE>. A new copy of the <CODE>SnmpVarBindList</CODE> is created.
* It is a real deep copy.
* @return The <CODE>SnmpVarBindList</CODE> clone.
*/
public synchronized SnmpVarBindList cloneWithValue() {
SnmpVarBindList newvb = new SnmpVarBindList() ;
newvb.setTimestamp(this.getTimestamp()) ;
newvb.ensureCapacity(this.size()) ;
for (int i = 0; i < this.size() ; i++) {
SnmpVarBind avar = (SnmpVarBind)elementData[i] ;
newvb.addElement(avar.clone()) ;
}
return newvb ;
}
/**
* Clones the <CODE>SnmpVarBindList</CODE>. It does not clone the value part of the variable.
* It is a deep copy (except for the value portion).
* @return The <CODE>SnmpVarBindList</CODE> clone.
*/
public synchronized SnmpVarBindList cloneWithoutValue() {
SnmpVarBindList newvb = new SnmpVarBindList() ;
int max = this.size();
newvb.ensureCapacity(max) ;
for (int i = 0; i < max ; i++) {
SnmpVarBind avar = (SnmpVarBind)elementData[i] ;
newvb.addElement(avar.cloneWithoutValue()) ;
}
return newvb ;
}
/**
* Clones the <CODE>SnmpVarBindList</CODE>. A new copy of the <CODE>SnmpVarBindList</CODE> is created.
* It is a real deep copy.
* @return The object clone.
*/
public synchronized Object clone() {
return cloneWithValue() ;
}
/**
* Copies the <CODE>SnmpVarBindList</CODE> into a plain vector of <CODE>SnmpVarBind</CODE> objects.
* If the <code>copy</code> flag is false, does a shallow copy of the list. Otherwise,
* individual elements will be cloned.
* @param copy The flag indicating whether each object in the list should be cloned.
* @return A new vector of <CODE>SnmpVarBind</CODE> objects.
*/
public synchronized Vector toVector(boolean copy) {
final int count = elementCount;
if (copy == false) return (Vector) super.clone();
Vector result = new Vector(count,5);
for (int i = 0; i < count ; i++) {
SnmpVarBind avar = (SnmpVarBind)elementData[i] ;
result.addElement(avar.clone()) ;
}
return result;
}
/**
* Returns a <CODE>String</CODE> containing the ASCII representation of all OIDs in the list.
* @return An ASCII list of all OIDs in this list.
*/
public String oidListToString() {
StringBuffer s = new StringBuffer(300) ;
for (int i = 0 ; i < elementCount ; i++) {
SnmpVarBind avar = (SnmpVarBind)elementData[i] ;
s.append(avar.getOid().toString() + "\n") ;
}
return s.toString() ;
}
/**
* Constructs a <CODE>String</CODE> containing details of each <CODE>SnmpVarBindList</CODE> (oid+value).
* This is typically used in debugging.
* @return A detailed <CODE>String</CODE> of all in the <CODE>SnmpVarBindList</CODE>.
*/
public synchronized String varBindListToString() {
StringBuffer s = new StringBuffer(300) ;
for (int i = 0; i < elementCount ; i++) {
s.append(elementData[i].toString() + "\n") ;
}
return s.toString() ;
}
/**
* Finalizer of the <CODE>SnmpVarBindList</CODE> objects.
* This method is called by the garbage collector on an object
* when garbage collection determines that there are no more references to the object.
* <P>Removes all the elements from this <CODE>SnmpVarBindList</CODE> object.
*/
public void finalize() {
removeAllElements() ;
}
}
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