SnmpMibOidpublic class SnmpMibOid extends SnmpMibNode implements Serializable| Represents a node in an SNMP MIB which is neither a group nor a variable.
This class defines a list of sub-nodes and the methods that allow to
manipulate the sub-nodes.
This class is used internally and by the class generated by
mibgen.
You should not need to use this class directly.
This API is a Sun Microsystems internal API and is subject
to change without notice. |
| Fields Summary |
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| private NonSyncVector | childrenContains the list of sub nodes. | | private int | nbChildrenThe number of sub nodes. |
| Constructors Summary |
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public SnmpMibOid()Default constructor.
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| Methods Summary |
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| public void | check(SnmpMibSubRequest req, int depth)Generic handling of the check operation.
This method should be overridden in subclasses.
for (Enumeration e= req.getElements(); e.hasMoreElements();) {
SnmpVarBind var= (SnmpVarBind) e.nextElement();
SnmpStatusException x =
new SnmpStatusException(SnmpStatusException.noAccess);
req.registerCheckException(var,x);
}
| | void | exportChildren(com.sun.jmx.snmp.agent.SnmpMibOid brother)Export this node's children to a brother node that will replace
this node in the OID tree.
This method is a patch that fixes the problem of registering
a subnode before its father node.
if (brother == null) return;
final long[] oid = new long[1];
for (int i=0; i<nbChildren; i++) {
final SnmpMibNode child = (SnmpMibNode)children.elementAt(i);
if (child == null) continue;
oid[0] = varList[i];
brother.registerNode(oid,0,child);
}
| | void | findHandlingNode(com.sun.jmx.snmp.SnmpVarBind varbind, long[] oid, int depth, SnmpRequestTree handlers)
final int length = oid.length;
SnmpMibNode node = null;
if (handlers == null)
throw new SnmpStatusException(SnmpStatusException.snmpRspGenErr);
if (depth > length) {
// Nothing is left... the oid is not valid
throw noSuchObjectException;
} else if (depth == length) {
// The oid is not complete...
throw noSuchInstanceException;
} else {
// Some children variable or subobject is being querried
// getChild() will raise an exception if no child is found.
//
final SnmpMibNode child= getChild(oid[depth]);
// XXXX zzzz : what about null children?
// (variables for nested groups)
// if child==null, then we're dealing with a variable or
// a table: we register this node.
// This behaviour should be overriden in subclasses,
// in particular in group meta classes: the group
// meta classes that hold tables should take care
// of forwarding this call to all the tables involved.
//
if (child == null)
handlers.add(this,depth,varbind);
else
child.findHandlingNode(varbind,oid,depth+1,handlers);
}
| | long[] | findNextHandlingNode(com.sun.jmx.snmp.SnmpVarBind varbind, long[] oid, int pos, int depth, SnmpRequestTree handlers, AcmChecker checker)
final int length = oid.length;
SnmpMibNode node = null;
long[] result = null;
if (handlers == null)
// This should be considered as a genErr, but we do not want to
// abort the whole request, so we're going to throw
// a noSuchObject...
//
throw noSuchObjectException;
final Object data = handlers.getUserData();
final int pduVersion = handlers.getRequestPduVersion();
if (pos >= length) {
long[] newOid= new long[1];
newOid[0]= getNextVarId(-1,data,pduVersion);
result = findNextHandlingNode(varbind,newOid,0,depth,handlers,
checker);
return result;
}
// search the element specified in the oid
//
long[] newOid= new long[1];
long index= oid[pos];
while (true) {
try {
final SnmpMibNode child = getChild(index);
// SnmpOid result = null;
if (child == null) {
// shouldn't happen
throw noSuchObjectException;
// validateVarId(index);
// handlers.add(this,varbind,depth);
// result = new SnmpOid(0);
} else {
checker.add(depth, index);
try {
result = child.findNextHandlingNode(varbind,oid,pos+1,
depth+1,handlers,
checker);
} finally {
checker.remove(depth);
}
}
// Build up the leaf OID
result[depth] = index;
return result;
} catch(SnmpStatusException e) {
// If there is no such element go one level up ...
//
index= getNextVarId(index,data,pduVersion);
// There is no need to carry the original oid ...
newOid[0]=index;
pos= 1;
oid=newOid;
}
}
| | public void | get(SnmpMibSubRequest req, int depth)Generic handling of the get operation.
This method should be overridden in subclasses.
for (Enumeration e= req.getElements(); e.hasMoreElements();) {
SnmpVarBind var= (SnmpVarBind) e.nextElement();
SnmpStatusException x =
new SnmpStatusException(SnmpStatusException.noSuchObject);
req.registerGetException(var,x);
}
| | SnmpMibNode | getChild(long id)
// first we need to retrieve the identifier in the list of children
//
final int pos= getInsertAt(id);
if (pos >= nbChildren)
throw noSuchObjectException;
if (varList[pos] != (int) id)
throw noSuchObjectException;
// Access the node
//
SnmpMibNode child = null;
try {
child = (SnmpMibNode) children.elementAtNonSync(pos);
} catch(ArrayIndexOutOfBoundsException e) {
throw noSuchObjectException;
}
if (child == null)
throw noSuchInstanceException;
return child;
| | private int | getInsertAt(long val)
int low= 0;
final int index= (int) val;
if (varList == null)
return -1;
int max= varList.length -1 ;
int elmt=0;
//final int[] v = varList;
//if (index > a[max])
//return max +1;
int curr= low + (max-low)/2;
while (low <= max) {
elmt= varList[curr];
// never know ...we might find something ...
//
if (index == elmt)
return curr;
if (elmt < index) {
low= curr +1;
} else {
max= curr -1;
}
curr= low + (max-low)/2;
}
return curr;
| | public void | getRootOid(java.util.Vector result)Computes the root OID of the MIB.
// If a node has several children, let assume that we are one step to
// far in order to get the MIB root.
//
if (nbChildren != 1)
return;
result.addElement(new Integer(varList[0]));
// Now query our child.
//
((SnmpMibNode)children.firstElement()).getRootOid(result);
| | public void | registerNode(java.lang.String oidString, SnmpMibNode node)Registers a specific node in the tree.
SnmpOid oid= new SnmpOid(oidString);
registerNode(oid.longValue(), 0, node);
| | void | registerNode(long[] oid, int cursor, SnmpMibNode node)Registers a specific node in the tree.
if (cursor >= oid.length)
throw new IllegalAccessException();
// Check if the node is already defined
//
long var= oid[cursor];
//System.out.println("entering registration for val="
// + String.valueOf(var) + " position= " + cursor);
int pos = retrieveIndex(var);
if (pos == nbChildren) {
nbChildren++;
varList= new int[nbChildren];
varList[0]= (int) var;
pos =0;
if ( (cursor + 1) == oid.length) {
// That 's the end of the trip.
// Do not forward the registration
//System.out.println("End of trip for val="
// + String.valueOf(var) + " position= " + cursor);
children.insertElementAt(node,pos);
return;
}
//System.out.println("Create node for val="
// + String.valueOf(var) + " position= " + cursor);
SnmpMibOid child= new SnmpMibOid();
children.insertElementAt(child, pos);
child.registerNode(oid, cursor + 1, node);
return;
}
if (pos == -1) {
// The node is not yet registered
//
int[] tmp= new int[nbChildren + 1];
tmp[nbChildren]= (int) var;
System.arraycopy(varList, 0, tmp, 0, nbChildren);
varList= tmp;
nbChildren++;
SnmpMibNode.sort(varList);
int newPos = retrieveIndex(var);
varList[newPos]= (int) var;
if ( (cursor + 1) == oid.length) {
// That 's the end of the trip.
// Do not forward the registration
//System.out.println("End of trip for val="
// + String.valueOf(var) + " position= " + cursor);
children.insertElementAt(node, newPos);
return;
}
SnmpMibOid child= new SnmpMibOid();
// System.out.println("Create node for val=" +
// String.valueOf(var) + " position= " + cursor);
children.insertElementAt(child, newPos);
child.registerNode(oid, cursor + 1, node);
return;
}
else {
// The node is already registered
//
SnmpMibNode child= (SnmpMibNode) children.elementAt(pos);
if ( (cursor + 1) == oid.length ) {
//System.out.println("Node already registered val=" +
// String.valueOf(var) + " position= " + cursor);
if (child == node) return;
if (child != null && node != null) {
// Now we're going to patch the tree the following way:
// if a subgroup has been registered before its father,
// we're going to replace the father OID node with
// the actual group-node and export the children from
// the temporary OID node to the actual group node.
//
if (node instanceof SnmpMibGroup) {
// `node' is a group => replace `child' with `node'
// export the child's subtree to `node'.
//
((SnmpMibOid)child).exportChildren((SnmpMibOid)node);
children.setElementAt(node,pos);
return;
} else if ((node instanceof SnmpMibOid) &&
(child instanceof SnmpMibGroup)) {
// `node' is a temporary node, and `child' is a
// group => keep child and export the node's
// subtree to `child'.
//
((SnmpMibOid)node).exportChildren((SnmpMibOid)child);
return;
} else if (node instanceof SnmpMibOid) {
// `node' and `child' are both temporary OID nodes
// => replace `child' with `node' and export child's
// subtree to `node'.
//
((SnmpMibOid)child).exportChildren((SnmpMibOid)node);
children.setElementAt(node,pos);
return;
}
}
children.setElementAt(node,pos);
return;
} else {
if (child == null)
throw new IllegalAccessException();
((SnmpMibOid)child).registerNode(oid, cursor + 1, node);
}
}
| | private int | retrieveIndex(long val)
int low= 0;
int cursor= (int) val;
if (varList == null || varList.length < 1)
return nbChildren;
int max= varList.length -1 ;
int curr= low + (max-low)/2;
int elmt= 0;
while (low <= max) {
elmt= varList[curr];
if (cursor == elmt) {
// We need to get the next index ...
//
return curr;
}
if (elmt < cursor) {
low= curr +1;
} else {
max= curr -1;
}
curr= low + (max-low)/2;
}
return -1;
| | public void | set(SnmpMibSubRequest req, int depth)Generic handling of the set operation.
This method should be overridden in subclasses.
for (Enumeration e= req.getElements(); e.hasMoreElements();) {
SnmpVarBind var= (SnmpVarBind) e.nextElement();
SnmpStatusException x =
new SnmpStatusException(SnmpStatusException.noAccess);
req.registerSetException(var,x);
}
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