Source Code Cross Referenced for Descriptor.java in  » JMX » mx4j » javax » management » Java Source Code / Java DocumentationJava Source Code and Java Documentation

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Java Source Code / Java Documentation » JMX » mx4j » javax.management 
Source Cross Referenced  Class Diagram Java Document (Java Doc) 


01:        /*
02:         * Copyright (C) The MX4J Contributors.
03:         * All rights reserved.
04:         *
05:         * This software is distributed under the terms of the MX4J License version 1.0.
06:         * See the terms of the MX4J License in the documentation provided with this software.
07:         */
08:
09:        package javax.management;
10:
11:        import java.io.Serializable;
12:
13:        /**
14:         * A set of name-value pairs that allow ModelMBean metadata to have additional information attached to.
15:         * Descriptor is cloneable since represent a snapshot of what the client passed in to the ModelMBean.
16:         * This ensures that if the client nulls out some value, the descriptor is still valid, since it has been cloned
17:         * prior the client modification. The client can always re-set the descriptor on the model mbean.
18:         *
19:         * @version $Revision: 1.6 $
20:         */
21:        public interface Descriptor extends Cloneable, Serializable {
22:            /**
23:             * Returns the value of a given field name.
24:             *
25:             * @param fieldName The field name
26:             * @return Object The value for the given field name. Returns null if not found.
27:             * @throws RuntimeOperationsException if the value for field name is illegal
28:             */
29:            public Object getFieldValue(String fieldName)
30:                    throws RuntimeOperationsException;
31:
32:            /**
33:             * Sets a value for the given field name. The field value will be checked
34:             * before being set. This will either add a new field or update it if it
35:             * already exists.
36:             *
37:             * @param fieldName  The name of the field
38:             * @param fieldValue The value for the given field name
39:             * @throws RuntimeOperationsException If values for fieldName or fieldValue
40:             *                                    are illegal or the description construction fails
41:             */
42:            public void setField(String fieldName, Object fieldValue)
43:                    throws RuntimeOperationsException;
44:
45:            /**
46:             * Removes the named field. If the field is not present, does nothing.
47:             *
48:             * @param fieldName The field to be removed.
49:             */
50:            public void removeField(String fieldName);
51:
52:            /**
53:             * Returns the names of all existing fields. If no fields are present, an empty array is returned.
54:             */
55:            public String[] getFieldNames();
56:
57:            /**
58:             * Return the values of the specified fields, in order.
59:             *
60:             * @param fieldNames The names of the fields
61:             * @return Object[] The values of the fields
62:             */
63:            public Object[] getFieldValues(String[] fieldNames);
64:
65:            /**
66:             * Returns the names and values of all existing fields.
67:             *
68:             * @return String[] The String array in the format fieldName=fieldValue.
69:             *         An empty descriptor will result in an empty array returned.
70:             */
71:            public String[] getFields();
72:
73:            /**
74:             * Sets the given fieldValues for the given fieldNames.
75:             * The size of both given array should match.
76:             *
77:             * @param fieldNames  The names of the fields.
78:             * @param fieldValues The values of the fields.
79:             * @throws RuntimeOperationsException if fieldNames or fieldValues contains illegal values.
80:             */
81:            public void setFields(String[] fieldNames, Object[] fieldValues)
82:                    throws RuntimeOperationsException;
83:
84:            /**
85:             * Returns a copy of this Descriptor
86:             */
87:            public Object clone() throws RuntimeOperationsException;
88:
89:            /**
90:             * Returns true when the values for the fields of this Descriptor are valid values, false otherwise.
91:             *
92:             * @throws RuntimeOperationsException If the field names or values are illegal
93:             */
94:            public boolean isValid() throws RuntimeOperationsException;
95:        }
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