/* * Copyright (c) 1999, 2005, Oracle and/or its affiliates. All rights reserved. * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. * * This code is free software; you can redistribute it and/or modify it * under the terms of the GNU General Public License version 2 only, as * published by the Free Software Foundation. Oracle designates this * particular file as subject to the "Classpath" exception as provided * by Oracle in the LICENSE file that accompanied this code. * * This code is distributed in the hope that it will be useful, but WITHOUT * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License * version 2 for more details (a copy is included in the LICENSE file that * accompanied this code). * * You should have received a copy of the GNU General Public License version * 2 along with this work; if not, write to the Free Software Foundation, * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. * * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA * or visit www.oracle.com if you need additional information or have any * questions. */package com.sun.jndi.cosnaming;import javax.naming.*;import javax.naming.spi.NamingManager;import java.util.NoSuchElementException;import java.util.Hashtable;import org.omg.CosNaming.*;import org.omg.CosNaming.NamingContextPackage.*;import org.omg.CORBA.*;/** * Implements the JNDI NamingEnumeration interface for COS * Naming. Gets hold of a list of bindings from the COS Naming Server * and allows the client to iterate through them. * * @author Raj Krishnamurthy * @author Rosanna Lee */final class CNBindingEnumeration implements NamingEnumeration { private static final int DEFAULT_BATCHSIZE = 100; private BindingListHolder _bindingList; // list of bindings private BindingIterator _bindingIter; // iterator for getting list of bindings private int counter; // pointer in _bindingList private int batchsize = DEFAULT_BATCHSIZE; // how many to ask for each time private CNCtx _ctx; // ctx to list private Hashtable _env; // environment for getObjectInstance private boolean more = false; // iterator done? private boolean isLookedUpCtx = false; // iterating on a context beneath this context ? /** * Creates a CNBindingEnumeration object. * @param ctx Context to enumerate */ CNBindingEnumeration(CNCtx ctx, boolean isLookedUpCtx, Hashtable env) { // Get batch size to use String batch = (env != null ? (String)env.get(javax.naming.Context.BATCHSIZE) : null); if (batch != null) { try { batchsize = Integer.parseInt(batch); } catch (NumberFormatException e) { throw new IllegalArgumentException("Batch size not numeric: " + batch); } } _ctx = ctx; _ctx.incEnumCount(); this.isLookedUpCtx = isLookedUpCtx; _env = env; _bindingList = new BindingListHolder(); BindingIteratorHolder _bindingIterH = new BindingIteratorHolder(); // Perform listing and request that bindings be returned in _bindingIter // Upon return,_bindingList returns a zero length list _ctx._nc.list(0, _bindingList, _bindingIterH); _bindingIter = _bindingIterH.value; // Get first batch using _bindingIter if (_bindingIter != null) { more = _bindingIter.next_n(batchsize, _bindingList); } else { more = false; } counter = 0; } /** * Returns the next binding in the list. * @exception NamingException any naming exception. */ public java.lang.Object next() throws NamingException { if (more && counter >= _bindingList.value.length) { getMore(); } if (more && counter < _bindingList.value.length) { org.omg.CosNaming.Binding bndg = _bindingList.value[counter]; counter++; return mapBinding(bndg); } else { throw new NoSuchElementException(); } } /** * Returns true or false depending on whether there are more bindings. * @return boolean value */ public boolean hasMore() throws NamingException { // If there's more, check whether current bindingList has been exhausted, // and if so, try to get more. // If no more, just say so. return more ? (counter < _bindingList.value.length || getMore()) : false; } /** * Returns true or false depending on whether there are more bindings. * Need to define this to satisfy the Enumeration api requirement. * @return boolean value */ public boolean hasMoreElements() { try { return hasMore(); } catch (NamingException e) { return false; } } /** * Returns the next binding in the list. * @exception NoSuchElementException Thrown when the end of the * list is reached. */ public java.lang.Object nextElement() { try { return next(); } catch (NamingException ne) { throw new NoSuchElementException(); } } public void close() throws NamingException { more = false; if (_bindingIter != null) { _bindingIter.destroy(); _bindingIter = null; } if (_ctx != null) { _ctx.decEnumCount(); /** * context was obtained by CNCtx, the user doesn't have a handle to * it, close it as we are done enumerating through the context */ if (isLookedUpCtx) { _ctx.close(); } _ctx = null; } } protected void finalize() { try { close(); } catch (NamingException e) { // ignore failures } } /** * Get the next batch using _bindingIter. Update the 'more' field. */ private boolean getMore() throws NamingException { try { more = _bindingIter.next_n(batchsize, _bindingList); counter = 0; // reset } catch (Exception e) { more = false; NamingException ne = new NamingException( "Problem getting binding list"); ne.setRootCause(e); throw ne; } return more; } /** * Constructs a JNDI Binding object from the COS Naming binding * object. * @exception NameNotFound No objects under the name. * @exception CannotProceed Unable to obtain a continuation context * @exception InvalidName Name not understood. * @exception NamingException One of the above. */ private javax.naming.Binding mapBinding(org.omg.CosNaming.Binding bndg) throws NamingException { java.lang.Object obj = _ctx.callResolve(bndg.binding_name); Name cname = CNNameParser.cosNameToName(bndg.binding_name); try { obj = NamingManager.getObjectInstance(obj, cname, _ctx, _env); } catch (NamingException e) { throw e; } catch (Exception e) { NamingException ne = new NamingException( "problem generating object using object factory"); ne.setRootCause(e); throw ne; } // Use cname.toString() instead of bindingName because the name // in the binding should be a composite name String cnameStr = cname.toString(); javax.naming.Binding jbndg = new javax.naming.Binding(cnameStr, obj); NameComponent[] comps = _ctx.makeFullName(bndg.binding_name); String fullName = CNNameParser.cosNameToInsString(comps); jbndg.setNameInNamespace(fullName); return jbndg; }}
/*
* Copyright (c) 1999, 2005, Oracle and/or its affiliates. All rights reserved.
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
*
* This code is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License version 2 only, as
* published by the Free Software Foundation. Oracle designates this
* particular file as subject to the "Classpath" exception as provided
* by Oracle in the LICENSE file that accompanied this code.
*
* This code is distributed in the hope that it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
* version 2 for more details (a copy is included in the LICENSE file that
* accompanied this code).
*
* You should have received a copy of the GNU General Public License version
* 2 along with this work; if not, write to the Free Software Foundation,
* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
*
* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
* or visit www.oracle.com if you need additional information or have any
* questions.
*/
package com.sun.jndi.cosnaming;
import javax.naming.*;
import javax.naming.spi.NamingManager;
import java.util.NoSuchElementException;
import java.util.Hashtable;
import org.omg.CosNaming.*;
import org.omg.CosNaming.NamingContextPackage.*;
import org.omg.CORBA.*;
/**
* Implements the JNDI NamingEnumeration interface for COS
* Naming. Gets hold of a list of bindings from the COS Naming Server
* and allows the client to iterate through them.
*
* @author Raj Krishnamurthy
* @author Rosanna Lee
*/
final class CNBindingEnumeration implements NamingEnumeration {
private static final int DEFAULT_BATCHSIZE = 100;
private BindingListHolder _bindingList; // list of bindings
private BindingIterator _bindingIter; // iterator for getting list of bindings
private int counter; // pointer in _bindingList
private int batchsize = DEFAULT_BATCHSIZE; // how many to ask for each time
private CNCtx _ctx; // ctx to list
private Hashtable _env; // environment for getObjectInstance
private boolean more = false; // iterator done?
private boolean isLookedUpCtx = false; // iterating on a context beneath this context ?
/**
* Creates a CNBindingEnumeration object.
* @param ctx Context to enumerate
*/
CNBindingEnumeration(CNCtx ctx, boolean isLookedUpCtx, Hashtable env) {
// Get batch size to use
String batch = (env != null ?
(String)env.get(javax.naming.Context.BATCHSIZE) : null);
if (batch != null) {
try {
batchsize = Integer.parseInt(batch);
} catch (NumberFormatException e) {
throw new IllegalArgumentException("Batch size not numeric: " + batch);
}
}
_ctx = ctx;
_ctx.incEnumCount();
this.isLookedUpCtx = isLookedUpCtx;
_env = env;
_bindingList = new BindingListHolder();
BindingIteratorHolder _bindingIterH = new BindingIteratorHolder();
// Perform listing and request that bindings be returned in _bindingIter
// Upon return,_bindingList returns a zero length list
_ctx._nc.list(0, _bindingList, _bindingIterH);
_bindingIter = _bindingIterH.value;
// Get first batch using _bindingIter
if (_bindingIter != null) {
more = _bindingIter.next_n(batchsize, _bindingList);
} else {
more = false;
}
counter = 0;
}
/**
* Returns the next binding in the list.
* @exception NamingException any naming exception.
*/
public java.lang.Object next() throws NamingException {
if (more && counter >= _bindingList.value.length) {
getMore();
}
if (more && counter < _bindingList.value.length) {
org.omg.CosNaming.Binding bndg = _bindingList.value[counter];
counter++;
return mapBinding(bndg);
} else {
throw new NoSuchElementException();
}
}
/**
* Returns true or false depending on whether there are more bindings.
* @return boolean value
*/
public boolean hasMore() throws NamingException {
// If there's more, check whether current bindingList has been exhausted,
// and if so, try to get more.
// If no more, just say so.
return more ? (counter < _bindingList.value.length || getMore()) : false;
}
/**
* Returns true or false depending on whether there are more bindings.
* Need to define this to satisfy the Enumeration api requirement.
* @return boolean value
*/
public boolean hasMoreElements() {
try {
return hasMore();
} catch (NamingException e) {
return false;
}
}
/**
* Returns the next binding in the list.
* @exception NoSuchElementException Thrown when the end of the
* list is reached.
*/
public java.lang.Object nextElement() {
try {
return next();
} catch (NamingException ne) {
throw new NoSuchElementException();
}
}
public void close() throws NamingException {
more = false;
if (_bindingIter != null) {
_bindingIter.destroy();
_bindingIter = null;
}
if (_ctx != null) {
_ctx.decEnumCount();
/**
* context was obtained by CNCtx, the user doesn't have a handle to
* it, close it as we are done enumerating through the context
*/
if (isLookedUpCtx) {
_ctx.close();
}
_ctx = null;
}
}
protected void finalize() {
try {
close();
} catch (NamingException e) {
// ignore failures
}
}
/**
* Get the next batch using _bindingIter. Update the 'more' field.
*/
private boolean getMore() throws NamingException {
try {
more = _bindingIter.next_n(batchsize, _bindingList);
counter = 0; // reset
} catch (Exception e) {
more = false;
NamingException ne = new NamingException(
"Problem getting binding list");
ne.setRootCause(e);
throw ne;
}
return more;
}
/**
* Constructs a JNDI Binding object from the COS Naming binding
* object.
* @exception NameNotFound No objects under the name.
* @exception CannotProceed Unable to obtain a continuation context
* @exception InvalidName Name not understood.
* @exception NamingException One of the above.
*/
private javax.naming.Binding mapBinding(org.omg.CosNaming.Binding bndg)
throws NamingException {
java.lang.Object obj = _ctx.callResolve(bndg.binding_name);
Name cname = CNNameParser.cosNameToName(bndg.binding_name);
try {
obj = NamingManager.getObjectInstance(obj, cname, _ctx, _env);
} catch (NamingException e) {
throw e;
} catch (Exception e) {
NamingException ne = new NamingException(
"problem generating object using object factory");
ne.setRootCause(e);
throw ne;
}
// Use cname.toString() instead of bindingName because the name
// in the binding should be a composite name
String cnameStr = cname.toString();
javax.naming.Binding jbndg = new javax.naming.Binding(cnameStr, obj);
NameComponent[] comps = _ctx.makeFullName(bndg.binding_name);
String fullName = CNNameParser.cosNameToInsString(comps);
jbndg.setNameInNamespace(fullName);
return jbndg;
}
}