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 * Copyright (c) 2000, 2017, 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
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 * 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
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/*
 * @author    IBM Corp.
 *
 * Copyright IBM Corp. 1999-2000.  All rights reserved.
 */

package javax.management.modelmbean;

import static com.sun.jmx.defaults.JmxProperties.MODELMBEAN_LOGGER;
import com.sun.jmx.mbeanserver.GetPropertyAction;

import java.io.IOException;
import java.io.ObjectInputStream;
import java.io.ObjectOutputStream;
import java.io.ObjectStreamField;
import java.security.AccessController;
import java.lang.System.Logger.Level;

import javax.management.Descriptor;
import javax.management.DescriptorAccess;
import javax.management.MBeanNotificationInfo;
import javax.management.RuntimeOperationsException;

The ModelMBeanNotificationInfo object describes a notification emitted
by a ModelMBean.
It is a subclass of MBeanNotificationInfo with the addition of an
associated Descriptor and an implementation of the Descriptor interface.

The fields in the descriptor are defined, but not limited to, the following.
Note that when the Type in this table is Number, a String that is the decimal
representation of a Long can also be used.

ModelMBeanNotificationInfo Fields

Name
Type
Meaning


name
String
    
Notification name.
descriptorType
String
    
Must be "notification".
severity
Number
    
0-6 where 0: unknown; 1: non-recoverable;
        2: critical, failure; 3: major, severe;
        4: minor, marginal, error; 5: warning;
        6: normal, cleared, informative
messageID
String
    
Unique key for message text (to allow translation, analysis).
messageText
String
    
Text of notification.
log
String
    
T - log message, F - do not log message.
logfile
String
    
fully qualified file name appropriate for operating system.
visibility
Number
    
1-4 where 1: always visible 4: rarely visible.
presentationString
String
    
XML formatted string to allow presentation of data.


The default descriptor contains the name, descriptorType,
displayName and severity(=6) fields.  The default value of the name
and displayName fields is the name of the Notification class (as
specified by the name parameter of the
ModelMBeanNotificationInfo constructor).
The serialVersionUID of this class is -7445681389570207141L.
Since:
1.5/**
 * <p>The ModelMBeanNotificationInfo object describes a notification emitted
 * by a ModelMBean.
 * It is a subclass of MBeanNotificationInfo with the addition of an
 * associated Descriptor and an implementation of the Descriptor interface.</p>
 *
 * <P id="descriptor">
 * The fields in the descriptor are defined, but not limited to, the following.
 * Note that when the Type in this table is Number, a String that is the decimal
 * representation of a Long can also be used.</P>
 *
 * <table class="striped">
 * <caption style="display:none">ModelMBeanNotificationInfo Fields</caption>
 * <thead>
 * <tr><th scope="col">Name</th><th scope="col">Type</th><th scope="col">Meaning</th></tr>
 * </thead>
 * <tbody style="text-align:left">
 * <tr><th scope="row">name</th><td>String</td>
 *     <td>Notification name.</td></tr>
 * <tr><th scope="row">descriptorType</th><td>String</td>
 *     <td>Must be "notification".</td></tr>
 * <tr><th scope="row">severity</th><td>Number</td>
 *     <td>0-6 where 0: unknown; 1: non-recoverable;
 *         2: critical, failure; 3: major, severe;
 *         4: minor, marginal, error; 5: warning;
 *         6: normal, cleared, informative</td></tr>
 * <tr><th scope="row">messageID</th><td>String</td>
 *     <td>Unique key for message text (to allow translation, analysis).</td></tr>
 * <tr><th scope="row">messageText</th><td>String</td>
 *     <td>Text of notification.</td></tr>
 * <tr><th scope="row">log</th><td>String</td>
 *     <td>T - log message, F - do not log message.</td></tr>
 * <tr><th scope="row">logfile</th><td>String</td>
 *     <td>fully qualified file name appropriate for operating system.</td></tr>
 * <tr><th scope="row">visibility</th><td>Number</td>
 *     <td>1-4 where 1: always visible 4: rarely visible.</td></tr>
 * <tr><th scope="row">presentationString</th><td>String</td>
 *     <td>XML formatted string to allow presentation of data.</td></tr>
 * </tbody>
 * </table>
 *
 * <p>The default descriptor contains the name, descriptorType,
 * displayName and severity(=6) fields.  The default value of the name
 * and displayName fields is the name of the Notification class (as
 * specified by the <code>name</code> parameter of the
 * ModelMBeanNotificationInfo constructor).</p>
 *
 * <p>The <b>serialVersionUID</b> of this class is <code>-7445681389570207141L</code>.
 *
 * @since 1.5
 */

@SuppressWarnings("serial")  // serialVersionUID is not constant
public class ModelMBeanNotificationInfo
    extends MBeanNotificationInfo
    implements DescriptorAccess {

    // Serialization compatibility stuff:
    // Two serial forms are supported in this class. The selected form
    // depends on system property "jmx.serial.form":
    //  - "1.0" for JMX 1.0
    //  - any other value for JMX 1.1 and higher
    //
    // Serial version for old serial form
    private static final long oldSerialVersionUID = -5211564525059047097L;
    //
    // Serial version for new serial form
    private static final long newSerialVersionUID = -7445681389570207141L;
    //
    // Serializable fields in old serial form
    private static final ObjectStreamField[] oldSerialPersistentFields =
    {
      new ObjectStreamField("notificationDescriptor", Descriptor.class),
      new ObjectStreamField("currClass", String.class)
    };
    //
    // Serializable fields in new serial form
    private static final ObjectStreamField[] newSerialPersistentFields =
    {
      new ObjectStreamField("notificationDescriptor", Descriptor.class)
    };
    //
    // Actual serial version and serial form
    private static final long serialVersionUID;
    
@serialField
notificationDescriptor Descriptor The descriptor
  containing the appropriate metadata for this instance/**
     * @serialField notificationDescriptor Descriptor The descriptor
     *   containing the appropriate metadata for this instance
     */
    private static final ObjectStreamField[] serialPersistentFields;
    private static boolean compat = false;
    static {
        try {
            GetPropertyAction act = new GetPropertyAction("jmx.serial.form");
            String form = AccessController.doPrivileged(act);
            compat = (form != null && form.equals("1.0"));
        } catch (Exception e) {
            // OK: No compat with 1.0
        }
        if (compat) {
            serialPersistentFields = oldSerialPersistentFields;
            serialVersionUID = oldSerialVersionUID;
        } else {
            serialPersistentFields = newSerialPersistentFields;
            serialVersionUID = newSerialVersionUID;
        }
    }
    //
    // END Serialization compatibility stuff

    
@serial
The descriptor containing the appropriate metadata for
        this instance/**
     * @serial The descriptor containing the appropriate metadata for
     *         this instance
     */
    private Descriptor notificationDescriptor;

    private static final String currClass = "ModelMBeanNotificationInfo";

    
Constructs a ModelMBeanNotificationInfo object with a default
descriptor.
Params:
notifTypes – The array of strings (in dot notation) containing
    the notification types that may be emitted.
name – The name of the Notification class.
description – A human readable description of the
    Notification. Optional./**
     * Constructs a ModelMBeanNotificationInfo object with a default
     * descriptor.
     *
     * @param notifTypes The array of strings (in dot notation) containing
     *     the notification types that may be emitted.
     * @param name The name of the Notification class.
     * @param description A human readable description of the
     *     Notification. Optional.
     **/
    public ModelMBeanNotificationInfo(String[] notifTypes,
                                      String name,
                                      String description) {
        this(notifTypes,name,description,null);
    }

    
Constructs a ModelMBeanNotificationInfo object.
Params:
notifTypes – The array of strings (in dot notation)
       containing the notification types that may be emitted.
name – The name of the Notification class.
description – A human readable description of the Notification.
       Optional.
descriptor – An instance of Descriptor containing the
       appropriate metadata for this instance of the
       MBeanNotificationInfo. If it is null a default descriptor
       will be created. If the descriptor does not contain the
       fields "displayName" or "severity",
       the missing ones are added with their default values.
Throws:
RuntimeOperationsException – Wraps an IllegalArgumentException. The descriptor is invalid, or descriptor field "name" is not equal to parameter name, or descriptor field "descriptorType" is not equal to "notification"./**
     * Constructs a ModelMBeanNotificationInfo object.
     *
     * @param notifTypes The array of strings (in dot notation)
     *        containing the notification types that may be emitted.
     * @param name The name of the Notification class.
     * @param description A human readable description of the Notification.
     *        Optional.
     * @param descriptor An instance of Descriptor containing the
     *        appropriate metadata for this instance of the
     *        MBeanNotificationInfo. If it is null a default descriptor
     *        will be created. If the descriptor does not contain the
     *        fields "displayName" or "severity",
     *        the missing ones are added with their default values.
     *
     * @exception RuntimeOperationsException Wraps an
     *    {@link IllegalArgumentException}. The descriptor is invalid, or
     *    descriptor field "name" is not equal to parameter name, or
     *    descriptor field "descriptorType" is not equal to "notification".
     *
     **/
    public ModelMBeanNotificationInfo(String[] notifTypes,
                                      String name,
                                      String description,
                                      Descriptor descriptor) {
        super(notifTypes, name, description);
        if (MODELMBEAN_LOGGER.isLoggable(Level.TRACE)) {
            MODELMBEAN_LOGGER.log(Level.TRACE, "Entry");
        }
        notificationDescriptor = validDescriptor(descriptor);
    }

    
Constructs a new ModelMBeanNotificationInfo object from this
ModelMBeanNotfication Object.
Params:
inInfo – the ModelMBeanNotificationInfo to be duplicated/**
     * Constructs a new ModelMBeanNotificationInfo object from this
     * ModelMBeanNotfication Object.
     *
     * @param inInfo the ModelMBeanNotificationInfo to be duplicated
     *
     **/
    public ModelMBeanNotificationInfo(ModelMBeanNotificationInfo inInfo) {
        this(inInfo.getNotifTypes(),
             inInfo.getName(),
             inInfo.getDescription(),inInfo.getDescriptor());
    }

    
Creates and returns a new ModelMBeanNotificationInfo which is a
duplicate of this ModelMBeanNotificationInfo.
/**
     * Creates and returns a new ModelMBeanNotificationInfo which is a
     * duplicate of this ModelMBeanNotificationInfo.
     **/
    public Object clone () {
        if (MODELMBEAN_LOGGER.isLoggable(Level.TRACE)) {
            MODELMBEAN_LOGGER.log(Level.TRACE, "Entry");
        }
        return(new ModelMBeanNotificationInfo(this));
    }

    
Returns a copy of the associated Descriptor for the
ModelMBeanNotificationInfo.
See Also:
setDescriptor
Returns:
Descriptor associated with the
ModelMBeanNotificationInfo object./**
     * Returns a copy of the associated Descriptor for the
     * ModelMBeanNotificationInfo.
     *
     * @return Descriptor associated with the
     * ModelMBeanNotificationInfo object.
     *
     * @see #setDescriptor
     **/
    public Descriptor getDescriptor() {
        if (MODELMBEAN_LOGGER.isLoggable(Level.TRACE)) {
            MODELMBEAN_LOGGER.log(Level.TRACE, "Entry");
        }

        if (notificationDescriptor == null) {
            // Dead code. Should never happen.
            if (MODELMBEAN_LOGGER.isLoggable(Level.TRACE)) {
                MODELMBEAN_LOGGER.log(Level.TRACE,
                        "Descriptor value is null, " +
                        "setting descriptor to default values");
            }
            notificationDescriptor = validDescriptor(null);
        }

        return((Descriptor)notificationDescriptor.clone());
    }

    
Sets associated Descriptor (full replace) for the
ModelMBeanNotificationInfo If the new Descriptor is null,
then the associated Descriptor reverts to a default
descriptor.  The Descriptor is validated before it is
assigned.  If the new Descriptor is invalid, then a
RuntimeOperationsException wrapping an
IllegalArgumentException is thrown.
Params:
inDescriptor – replaces the Descriptor associated with the
ModelMBeanNotification interface
Throws:
RuntimeOperationsException – Wraps an IllegalArgumentException for invalid Descriptor.
See Also:
getDescriptor/**
     * Sets associated Descriptor (full replace) for the
     * ModelMBeanNotificationInfo If the new Descriptor is null,
     * then the associated Descriptor reverts to a default
     * descriptor.  The Descriptor is validated before it is
     * assigned.  If the new Descriptor is invalid, then a
     * RuntimeOperationsException wrapping an
     * IllegalArgumentException is thrown.
     *
     * @param inDescriptor replaces the Descriptor associated with the
     * ModelMBeanNotification interface
     *
     * @exception RuntimeOperationsException Wraps an
     * {@link IllegalArgumentException} for invalid Descriptor.
     *
     * @see #getDescriptor
     **/
    public void setDescriptor(Descriptor inDescriptor) {
        if (MODELMBEAN_LOGGER.isLoggable(Level.TRACE)) {
            MODELMBEAN_LOGGER.log(Level.TRACE, "Entry");
        }
        notificationDescriptor = validDescriptor(inDescriptor);
    }

    
Returns a human readable string containing
ModelMBeanNotificationInfo.
Returns:
a string describing this object./**
     * Returns a human readable string containing
     * ModelMBeanNotificationInfo.
     *
     * @return a string describing this object.
     **/
    public String toString() {
        if (MODELMBEAN_LOGGER.isLoggable(Level.TRACE)) {
            MODELMBEAN_LOGGER.log(Level.TRACE, "Entry");
        }

        final StringBuilder retStr = new StringBuilder();

        retStr.append("ModelMBeanNotificationInfo: ")
            .append(this.getName());

        retStr.append(" ; Description: ")
            .append(this.getDescription());

        retStr.append(" ; Descriptor: ")
            .append(this.getDescriptor());

        retStr.append(" ; Types: ");
        String[] nTypes = this.getNotifTypes();
        for (int i=0; i < nTypes.length; i++) {
            if (i > 0) retStr.append(", ");
            retStr.append(nTypes[i]);
        }
        return retStr.toString();
    }


    
Clones the passed in Descriptor, sets default values, and checks for validity.
If the Descriptor is invalid (for instance by having the wrong "name"),
this indicates programming error and a RuntimeOperationsException will be thrown.
The following fields will be defaulted if they are not already set:
descriptorType="notification",displayName=this.getName(),
name=this.getName(),severity="6"
Params:
in – Descriptor to be checked, or null which is equivalent to an
empty Descriptor.
Throws:
RuntimeOperationsException – if Descriptor is invalid/**
     * Clones the passed in Descriptor, sets default values, and checks for validity.
     * If the Descriptor is invalid (for instance by having the wrong "name"),
     * this indicates programming error and a RuntimeOperationsException will be thrown.
     *
     * The following fields will be defaulted if they are not already set:
     * descriptorType="notification",displayName=this.getName(),
     * name=this.getName(),severity="6"
     *
     *
     * @param in Descriptor to be checked, or null which is equivalent to an
     * empty Descriptor.
     * @exception RuntimeOperationsException if Descriptor is invalid
     */
    private Descriptor validDescriptor(final Descriptor in) throws RuntimeOperationsException {
        Descriptor clone;
        boolean defaulted = (in == null);
        if (defaulted) {
            clone = new DescriptorSupport();
            MODELMBEAN_LOGGER.log(Level.TRACE, "Null Descriptor, creating new.");
        } else {
            clone = (Descriptor) in.clone();
        }

        //Setting defaults.
        if (defaulted && clone.getFieldValue("name")==null) {
            clone.setField("name", this.getName());
            MODELMBEAN_LOGGER.log(Level.TRACE, "Defaulting Descriptor name to " + this.getName());
        }
        if (defaulted && clone.getFieldValue("descriptorType")==null) {
            clone.setField("descriptorType", "notification");
            MODELMBEAN_LOGGER.log(Level.TRACE, "Defaulting descriptorType to \"notification\"");
        }
        if (clone.getFieldValue("displayName") == null) {
            clone.setField("displayName",this.getName());
            MODELMBEAN_LOGGER.log(Level.TRACE, "Defaulting Descriptor displayName to " + this.getName());
        }
        if (clone.getFieldValue("severity") == null) {
            clone.setField("severity", "6");
            MODELMBEAN_LOGGER.log(Level.TRACE, "Defaulting Descriptor severity field to 6");
        }

        //Checking validity
        if (!clone.isValid()) {
             throw new RuntimeOperationsException(new IllegalArgumentException("Invalid Descriptor argument"),
                "The isValid() method of the Descriptor object itself returned false,"+
                "one or more required fields are invalid. Descriptor:" + clone.toString());
        }
        if (!getName().equalsIgnoreCase((String) clone.getFieldValue("name"))) {
                throw new RuntimeOperationsException(new IllegalArgumentException("Invalid Descriptor argument"),
                "The Descriptor \"name\" field does not match the object described. " +
                 " Expected: "+ this.getName() + " , was: " + clone.getFieldValue("name"));
        }
        if (!"notification".equalsIgnoreCase((String) clone.getFieldValue("descriptorType"))) {
                 throw new RuntimeOperationsException(new IllegalArgumentException("Invalid Descriptor argument"),
                "The Descriptor \"descriptorType\" field does not match the object described. " +
                 " Expected: \"notification\" ," + " was: " + clone.getFieldValue("descriptorType"));
        }

        return clone;
    }


    
Deserializes a ModelMBeanNotificationInfo from an ObjectInputStream. /**
     * Deserializes a {@link ModelMBeanNotificationInfo} from an
     * {@link ObjectInputStream}.
     **/
    private void readObject(ObjectInputStream in)
        throws IOException, ClassNotFoundException {
        // New serial form ignores extra field "currClass"
        in.defaultReadObject();
    }


    
Serializes a ModelMBeanNotificationInfo to an ObjectOutputStream. /**
     * Serializes a {@link ModelMBeanNotificationInfo} to an
     * {@link ObjectOutputStream}.
     **/
    private void writeObject(ObjectOutputStream out)
        throws IOException {
        if (compat) {
            // Serializes this instance in the old serial form
            //
            ObjectOutputStream.PutField fields = out.putFields();
            fields.put("notificationDescriptor", notificationDescriptor);
            fields.put("currClass", currClass);
            out.writeFields();
        } else {
            // Serializes this instance in the new serial form
            //
            out.defaultWriteObject();
        }
    }

}