| /* |
| * Copyright (c) 1997, 2011, 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.jmx.snmp; |
| |
| |
| |
| /** |
| * Represents an SNMP null value. |
| * <p><b>This API is a Sun Microsystems internal API and is subject |
| * to change without notice.</b></p> |
| */ |
| |
| public class SnmpNull extends SnmpValue { |
| private static final long serialVersionUID = 1783782515994279177L; |
| |
| // CONSTRUCTORS |
| //------------- |
| /** |
| * Constructs a new <CODE>SnmpNull</CODE>. |
| */ |
| public SnmpNull() { |
| tag = NullTag ; |
| } |
| |
| /** |
| * Constructs a new <CODE>SnmpNull</CODE>. |
| * <BR>For mibgen private use only. |
| */ |
| public SnmpNull(String dummy) { |
| this(); |
| } |
| |
| /** |
| * Constructs a new <CODE>SnmpNull</CODE> from the specified tag value. |
| * @param t The initialization value. |
| */ |
| public SnmpNull(int t) { |
| tag = t ; |
| } |
| |
| // PUBLIC METHODS |
| //--------------- |
| /** |
| * Returns the tag value of this <CODE>SnmpNull</CODE>. |
| * @return The value. |
| */ |
| public int getTag() { |
| return tag ; |
| } |
| |
| /** |
| * Converts the <CODE>NULL</CODE> value to its ASN.1 <CODE>String</CODE> form. |
| * When the tag is not the universal one, it is preprended |
| * to the <CODE>String</CODE> form. |
| * @return The <CODE>String</CODE> representation of the value. |
| */ |
| public String toString() { |
| String result = "" ; |
| if (tag != 5) { |
| result += "[" + tag + "] " ; |
| } |
| result += "NULL" ; |
| switch(tag) { |
| case errNoSuchObjectTag : |
| result += " (noSuchObject)" ; |
| break ; |
| |
| case errNoSuchInstanceTag : |
| result += " (noSuchInstance)" ; |
| break ; |
| |
| case errEndOfMibViewTag : |
| result += " (endOfMibView)" ; |
| break ; |
| } |
| return result ; |
| } |
| |
| /** |
| * Converts the <CODE>NULL</CODE> value to its <CODE>SnmpOid</CODE> form. |
| * Normally, a <CODE>NULL</CODE> value cannot be used as an index value, |
| * this method triggers an exception. |
| * @return The OID representation of the value. |
| */ |
| public SnmpOid toOid() { |
| throw new IllegalArgumentException() ; |
| } |
| |
| /** |
| * Performs a clone action. This provides a workaround for the |
| * <CODE>SnmpValue</CODE> interface. |
| * @return The SnmpValue clone. |
| */ |
| final synchronized public SnmpValue duplicate() { |
| return (SnmpValue) clone() ; |
| } |
| |
| /** |
| * Clones the <CODE>SnmpNull</CODE> object, making a copy of its data. |
| * @return The object clone. |
| */ |
| final synchronized public Object clone() { |
| SnmpNull newclone = null ; |
| try { |
| newclone = (SnmpNull) super.clone() ; |
| newclone.tag = tag ; |
| } catch (CloneNotSupportedException e) { |
| throw new InternalError(e) ; // vm bug. |
| } |
| return newclone ; |
| } |
| |
| /** |
| * Returns a textual description of the type object. |
| * @return ASN.1 textual description. |
| */ |
| final public String getTypeName() { |
| return name ; |
| } |
| |
| /** |
| * Checks if this <CODE>SnmpNull</CODE> object corresponds to a <CODE>noSuchObject</CODE> value. |
| * @return <CODE>true</CODE> if the tag equals {@link com.sun.jmx.snmp.SnmpDataTypeEnums#errNoSuchObjectTag}, |
| * <CODE>false</CODE> otherwise. |
| */ |
| public boolean isNoSuchObjectValue() { |
| return (tag == SnmpDataTypeEnums.errNoSuchObjectTag); |
| } |
| |
| /** |
| * Checks if this <CODE>SnmpNull</CODE> object corresponds to a <CODE>noSuchInstance</CODE> value. |
| * @return <CODE>true</CODE> if the tag equals {@link com.sun.jmx.snmp.SnmpDataTypeEnums#errNoSuchInstanceTag}, |
| * <CODE>false</CODE> otherwise. |
| */ |
| public boolean isNoSuchInstanceValue() { |
| return (tag == SnmpDataTypeEnums.errNoSuchInstanceTag); |
| } |
| |
| /** |
| * Checks if this <CODE>SnmpNull</CODE> object corresponds to an <CODE>endOfMibView</CODE> value. |
| * @return <CODE>true</CODE> if the tag equals {@link com.sun.jmx.snmp.SnmpDataTypeEnums#errEndOfMibViewTag}, |
| * <CODE>false</CODE> otherwise. |
| */ |
| public boolean isEndOfMibViewValue() { |
| return (tag == SnmpDataTypeEnums.errEndOfMibViewTag); |
| } |
| |
| // VARIABLES |
| //---------- |
| /** |
| * Name of the type. |
| */ |
| final static String name = "Null" ; |
| |
| /** |
| * This is the tag of the NULL value. By default, it is the universal tag value. |
| */ |
| private int tag = 5 ; |
| } |