Source Code Cross Referenced for ModelMBeanConstructorInfo.java in  » EJB-Server-JBoss-4.2.1 » jmx » javax » management » modelmbean » Java Source Code / Java DocumentationJava Source Code and Java Documentation

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Java Source Code / Java Documentation » EJB Server JBoss 4.2.1 » jmx » javax.management.modelmbean 
Source Cross Referenced  Class Diagram Java Document (Java Doc) 


001:        /*
002:         * JBoss, Home of Professional Open Source.
003:         * Copyright 2006, Red Hat Middleware LLC, and individual contributors
004:         * as indicated by the @author tags. See the copyright.txt file in the
005:         * distribution for a full listing of individual contributors.
006:         *
007:         * This is free software; you can redistribute it and/or modify it
008:         * under the terms of the GNU Lesser General Public License as
009:         * published by the Free Software Foundation; either version 2.1 of
010:         * the License, or (at your option) any later version.
011:         *
012:         * This software is distributed in the hope that it will be useful,
013:         * but WITHOUT ANY WARRANTY; without even the implied warranty of
014:         * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
015:         * Lesser General Public License for more details.
016:         *
017:         * You should have received a copy of the GNU Lesser General Public
018:         * License along with this software; if not, write to the Free
019:         * Software Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
020:         * 02110-1301 USA, or see the FSF site: http://www.fsf.org.
021:         */
022:        package javax.management.modelmbean;
023:
024:        import java.lang.reflect.Constructor;
025:
026:        import java.io.IOException;
027:        import java.io.ObjectInputStream;
028:        import java.io.ObjectOutputStream;
029:        import java.io.ObjectStreamField;
030:        import java.io.StreamCorruptedException;
031:
032:        import java.util.Arrays;
033:
034:        import javax.management.Descriptor;
035:        import javax.management.DescriptorAccess;
036:        import javax.management.MBeanConstructorInfo;
037:        import javax.management.MBeanParameterInfo;
038:        import javax.management.RuntimeOperationsException;
039:
040:        import org.jboss.mx.modelmbean.ModelMBeanConstants;
041:        import org.jboss.mx.util.Serialization;
042:
043:        /**
044:         * Represents constructor.
045:         *
046:         * @see javax.management.modelmbean.ModelMBeanInfo
047:         * @see javax.management.modelmbean.ModelMBeanInfoSupport
048:         *
049:         * @author  <a href="mailto:juha@jboss.org">Juha Lindfors</a>.
050:         * @author  <a href="mailto:adrian.brock@happeningtimes.com">Adrian Brock</a>.
051:         * @author  <a href="mailto:thomas.diesler@jboss.com">Thomas Diesler</a>.
052:         * @version $Revision: 57200 $
053:         *
054:         * <p><b>20020715 Adrian Brock:</b>
055:         * <ul>
056:         * <li> Serialization
057:         * </ul>  
058:         */
059:        public class ModelMBeanConstructorInfo extends MBeanConstructorInfo
060:                implements  DescriptorAccess, Cloneable {
061:
062:            // Attributes ----------------------------------------------------
063:
064:            /**
065:             * The descriptor associated with this constructor.
066:             */
067:            private Descriptor descriptor = null;
068:
069:            // Static --------------------------------------------------------
070:
071:            private static final long serialVersionUID;
072:            private static final ObjectStreamField[] serialPersistentFields;
073:
074:            static {
075:                switch (Serialization.version) {
076:                case Serialization.V1R0:
077:                    serialVersionUID = -4440125391095574518L;
078:                    break;
079:                default:
080:                    serialVersionUID = 3862947819818064362L;
081:                }
082:                serialPersistentFields = new ObjectStreamField[] { new ObjectStreamField(
083:                        "consDescriptor", Descriptor.class) };
084:            }
085:
086:            // Constructors --------------------------------------------------
087:            /**
088:             * Creates a new constructor info with a default descriptor.
089:             *
090:             * @param   description human readable description string
091:             * @param   constructorMethod a <tt>Constructor</tt> instance representing the MBean constructor
092:             */
093:            public ModelMBeanConstructorInfo(String description,
094:                    Constructor constructorMethod) {
095:                super (description, constructorMethod);
096:                setDescriptor(createDefaultDescriptor());
097:            }
098:
099:            /**
100:             * Creates a new constructor info with a given descriptor. If a <tt>null</tt> or invalid descriptor
101:             * is passed as a parameter, a default descriptor will be created for the constructor.
102:             *
103:             * @param   description human readable description string
104:             * @param   constructorMethod a <tt>Constructor</tt> instance representing the MBean constructor
105:             * @param   descriptor a descriptor to associate with this constructor
106:             */
107:            public ModelMBeanConstructorInfo(String description,
108:                    Constructor constructorMethod, Descriptor descriptor) {
109:                super (description, constructorMethod);
110:                setDescriptor(descriptor);
111:            }
112:
113:            /**
114:             * Creates a new constructor info with default descriptor.
115:             *
116:             * @param   name  name for the constructor
117:             * @param   description human readable description string
118:             * @param   signature constructor signature
119:             */
120:            public ModelMBeanConstructorInfo(String name, String description,
121:                    MBeanParameterInfo[] signature) {
122:                super (name, description, signature);
123:                setDescriptor(createDefaultDescriptor());
124:            }
125:
126:            /**
127:             * Creates a new constructor info with a given descriptor. If a <tt>null</tt> or invalid descriptor
128:             * is passed as a parameter, a default descriptor will be created for the constructor.
129:             *
130:             * @param name name for the constructor
131:             * @param description human readable description string
132:             * @param signature constructor signature
133:             * @param descriptor a descriptor to associate with this constructor
134:             */
135:            public ModelMBeanConstructorInfo(String name, String description,
136:                    MBeanParameterInfo[] signature, Descriptor descriptor) {
137:                this (name, description, signature);
138:                setDescriptor(descriptor);
139:            }
140:
141:            // DescriptorAccess implementation -------------------------------
142:
143:            /**
144:             * Returns a copy of the descriptor associated with this constructor.
145:             *
146:             * @return a copy of this constructor's descriptor instance
147:             */
148:            public Descriptor getDescriptor() {
149:                return (Descriptor) descriptor.clone();
150:            }
151:
152:            /**
153:             * Replaces the descriptor associated with this constructor. If the <tt>inDescriptor</tt>
154:             * argument is <tt>null</tt> then the existing descriptor is replaced with a default
155:             * descriptor.
156:             *
157:             * @param   inDescriptor   descriptor used for replacing the existing constructor descriptor
158:             * @throws  IllegalArgumentException if the new descriptor is not valid
159:             */
160:            public void setDescriptor(Descriptor inDescriptor) {
161:                if (inDescriptor == null)
162:                    inDescriptor = createDefaultDescriptor();
163:
164:                if (inDescriptor.isValid()
165:                        && isConstructorDescriptorValid(inDescriptor))
166:                    this .descriptor = inDescriptor;
167:            }
168:
169:            /**
170:             * Validate the descriptor in the context of an attribute
171:             */
172:            private boolean isConstructorDescriptorValid(Descriptor inDescriptor) {
173:                String name = (String) inDescriptor
174:                        .getFieldValue(ModelMBeanConstants.NAME);
175:                if (name.equals(getName()) == false)
176:                    throw new RuntimeOperationsException(
177:                            new IllegalArgumentException(
178:                                    "Invalid name, expected '" + getName()
179:                                            + "' but got: " + name));
180:
181:                String descriptorType = (String) inDescriptor
182:                        .getFieldValue(ModelMBeanConstants.DESCRIPTOR_TYPE);
183:                if (ModelMBeanConstants.OPERATION_DESCRIPTOR
184:                        .equalsIgnoreCase(descriptorType) == false)
185:                    throw new RuntimeOperationsException(
186:                            new IllegalArgumentException(
187:                                    "Invalid descriptorType, for constructor '"
188:                                            + name
189:                                            + "' expected 'operation' but got: "
190:                                            + descriptorType));
191:
192:                String role = (String) inDescriptor
193:                        .getFieldValue(ModelMBeanConstants.ROLE);
194:                if (ModelMBeanConstants.ROLE_CONSTRUCTOR.equals(role) == false)
195:                    throw new RuntimeOperationsException(
196:                            new IllegalArgumentException(
197:                                    "Invalid role, for constructor '"
198:                                            + name
199:                                            + "' expected 'constructor' but got: "
200:                                            + role));
201:
202:                return true;
203:            }
204:
205:            // Cloneable implementation --------------------------------------
206:
207:            public synchronized Object clone() {
208:                return (ModelMBeanConstructorInfo) super .clone();
209:            }
210:
211:            // Object overrides ----------------------------------------------
212:
213:            /**
214:             * @return a human readable string
215:             */
216:            public String toString() {
217:                StringBuffer buffer = new StringBuffer(100);
218:                buffer.append(getClass().getName()).append(":");
219:                buffer.append(" name=").append(getName());
220:                buffer.append(" description=").append(getDescription());
221:                buffer.append(" signature=").append(
222:                        Arrays.asList(getSignature()));
223:                buffer.append(" descriptor=").append(descriptor);
224:                return buffer.toString();
225:            }
226:
227:            // Private -------------------------------------------------------
228:            private Descriptor createDefaultDescriptor() {
229:                DescriptorSupport descr = new DescriptorSupport();
230:                descr.setField(ModelMBeanConstants.NAME, super .getName());
231:                descr.setField(ModelMBeanConstants.DESCRIPTOR_TYPE,
232:                        ModelMBeanConstants.OPERATION_DESCRIPTOR);
233:                descr.setField(ModelMBeanConstants.DISPLAY_NAME, super 
234:                        .getName());
235:                descr.setField(ModelMBeanConstants.ROLE,
236:                        ModelMBeanConstants.ROLE_CONSTRUCTOR);
237:                return descr;
238:            }
239:
240:            private void readObject(ObjectInputStream ois) throws IOException,
241:                    ClassNotFoundException {
242:                ObjectInputStream.GetField getField = ois.readFields();
243:                descriptor = (Descriptor) getField.get("consDescriptor", null);
244:                if (descriptor == null)
245:                    throw new StreamCorruptedException("Null descriptor?");
246:            }
247:
248:            private void writeObject(ObjectOutputStream oos) throws IOException {
249:                ObjectOutputStream.PutField putField = oos.putFields();
250:                putField.put("consDescriptor", descriptor);
251:                oos.writeFields();
252:            }
253:
254:        }
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