/* |
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* Copyright (c) 2000, 2007, Oracle and/or its affiliates. All rights reserved. |
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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
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* |
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* This code is free software; you can redistribute it and/or modify it |
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* under the terms of the GNU General Public License version 2 only, as |
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* published by the Free Software Foundation. Oracle designates this |
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* particular file as subject to the "Classpath" exception as provided |
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* by Oracle in the LICENSE file that accompanied this code. |
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* |
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* This code is distributed in the hope that it will be useful, but WITHOUT |
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
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* version 2 for more details (a copy is included in the LICENSE file that |
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* accompanied this code). |
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* |
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* You should have received a copy of the GNU General Public License version |
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* 2 along with this work; if not, write to the Free Software Foundation, |
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* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
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* |
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* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
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* or visit www.oracle.com if you need additional information or have any |
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* questions. |
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*/ |
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package javax.management.openmbean; |
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// java import |
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// |
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// jmx import |
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// |
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import javax.management.MBeanParameterInfo; |
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/** |
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* <p>Describes an operation of an Open MBean.</p> |
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* |
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* <p>This interface declares the same methods as the class {@link |
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* javax.management.MBeanOperationInfo}. A class implementing this |
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* interface (typically {@link OpenMBeanOperationInfoSupport}) should |
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* extend {@link javax.management.MBeanOperationInfo}.</p> |
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* |
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* <p>The {@link #getSignature()} method should return at runtime an |
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* array of instances of a subclass of {@link MBeanParameterInfo} |
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* which implements the {@link OpenMBeanParameterInfo} interface |
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* (typically {@link OpenMBeanParameterInfoSupport}).</p> |
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* |
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* |
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* @since 1.5 |
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*/ |
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public interface OpenMBeanOperationInfo { |
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// Re-declares fields and methods that are in class MBeanOperationInfo of JMX 1.0 |
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// (fields and methods will be removed when MBeanOperationInfo is made a parent interface of this interface) |
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/** |
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* Returns a human readable description of the operation |
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* described by this <tt>OpenMBeanOperationInfo</tt> instance. |
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* |
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* @return the description. |
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*/ |
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public String getDescription() ; |
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/** |
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* Returns the name of the operation |
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* described by this <tt>OpenMBeanOperationInfo</tt> instance. |
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* |
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* @return the name. |
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*/ |
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public String getName() ; |
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/** |
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* Returns an array of <tt>OpenMBeanParameterInfo</tt> instances |
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* describing each parameter in the signature of the operation |
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* described by this <tt>OpenMBeanOperationInfo</tt> instance. |
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* Each instance in the returned array should actually be a |
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* subclass of <tt>MBeanParameterInfo</tt> which implements the |
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* <tt>OpenMBeanParameterInfo</tt> interface (typically {@link |
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* OpenMBeanParameterInfoSupport}). |
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* |
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* @return the signature. |
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*/ |
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public MBeanParameterInfo[] getSignature() ; |
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/** |
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* Returns an <tt>int</tt> constant qualifying the impact of the |
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* operation described by this <tt>OpenMBeanOperationInfo</tt> |
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* instance. |
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* |
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* The returned constant is one of {@link |
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* javax.management.MBeanOperationInfo#INFO}, {@link |
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* javax.management.MBeanOperationInfo#ACTION}, {@link |
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* javax.management.MBeanOperationInfo#ACTION_INFO}, or {@link |
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* javax.management.MBeanOperationInfo#UNKNOWN}. |
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* |
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* @return the impact code. |
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*/ |
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public int getImpact() ; |
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/** |
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* Returns the fully qualified Java class name of the values |
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* returned by the operation described by this |
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* <tt>OpenMBeanOperationInfo</tt> instance. This method should |
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* return the same value as a call to |
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* <tt>getReturnOpenType().getClassName()</tt>. |
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* |
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* @return the return type. |
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*/ |
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public String getReturnType() ; |
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// Now declares methods that are specific to open MBeans |
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// |
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/** |
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* Returns the <i>open type</i> of the values returned by the |
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* operation described by this <tt>OpenMBeanOperationInfo</tt> |
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* instance. |
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* |
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* @return the return type. |
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*/ |
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public OpenType<?> getReturnOpenType() ; // open MBean specific method |
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// commodity methods |
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// |
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/** |
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* Compares the specified <var>obj</var> parameter with this <code>OpenMBeanOperationInfo</code> instance for equality. |
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* <p> |
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* Returns <tt>true</tt> if and only if all of the following statements are true: |
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* <ul> |
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* <li><var>obj</var> is non null,</li> |
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* <li><var>obj</var> also implements the <code>OpenMBeanOperationInfo</code> interface,</li> |
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* <li>their names are equal</li> |
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* <li>their signatures are equal</li> |
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* <li>their return open types are equal</li> |
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* <li>their impacts are equal</li> |
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* </ul> |
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* This ensures that this <tt>equals</tt> method works properly for <var>obj</var> parameters which are |
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* different implementations of the <code>OpenMBeanOperationInfo</code> interface. |
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* <br> |
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* @param obj the object to be compared for equality with this <code>OpenMBeanOperationInfo</code> instance; |
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* |
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* @return <code>true</code> if the specified object is equal to this <code>OpenMBeanOperationInfo</code> instance. |
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*/ |
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public boolean equals(Object obj); |
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/** |
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* Returns the hash code value for this <code>OpenMBeanOperationInfo</code> instance. |
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* <p> |
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* The hash code of an <code>OpenMBeanOperationInfo</code> instance is the sum of the hash codes |
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* of all elements of information used in <code>equals</code> comparisons |
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* (ie: its name, return open type, impact and signature, where the signature hashCode is calculated by a call to |
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* <tt>java.util.Arrays.asList(this.getSignature).hashCode()</tt>). |
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* <p> |
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* This ensures that <code> t1.equals(t2) </code> implies that <code> t1.hashCode()==t2.hashCode() </code> |
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* for any two <code>OpenMBeanOperationInfo</code> instances <code>t1</code> and <code>t2</code>, |
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* as required by the general contract of the method |
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* {@link Object#hashCode() Object.hashCode()}. |
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* <p> |
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* |
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* @return the hash code value for this <code>OpenMBeanOperationInfo</code> instance |
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*/ |
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public int hashCode(); |
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/** |
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* Returns a string representation of this <code>OpenMBeanOperationInfo</code> instance. |
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* <p> |
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* The string representation consists of the name of this class (ie <code>javax.management.openmbean.OpenMBeanOperationInfo</code>), |
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* and the name, signature, return open type and impact of the described operation. |
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* |
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* @return a string representation of this <code>OpenMBeanOperationInfo</code> instance |
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*/ |
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public String toString(); |
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} |