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 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.

 *

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 * 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.

 *

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package javax.management.openmbean;

// java import

//

// jmx import

//

import javax.management.MBeanParameterInfo;

/**

 * <p>Describes an operation of an Open MBean.</p>

 *

 * <p>This interface declares the same methods as the class {@link

 * javax.management.MBeanOperationInfo}.  A class implementing this

 * interface (typically {@link OpenMBeanOperationInfoSupport}) should

 * extend {@link javax.management.MBeanOperationInfo}.</p>

 *

 * <p>The {@link #getSignature()} method should return at runtime an

 * array of instances of a subclass of {@link MBeanParameterInfo}

 * which implements the {@link OpenMBeanParameterInfo} interface

 * (typically {@link OpenMBeanParameterInfoSupport}).</p>

 *

 *

 * @since 1.5

 */

public interface OpenMBeanOperationInfo  {

    // Re-declares fields and methods that are in class MBeanOperationInfo of JMX 1.0

    // (fields and methods will be removed when MBeanOperationInfo is made a parent interface of this interface)

    /**

     * Returns a human readable description of the operation

     * described by this {@code OpenMBeanOperationInfo} instance.

     *

     * @return the description.

     */

    public String getDescription() ;

    /**

     * Returns the name of the operation

     * described by this {@code OpenMBeanOperationInfo} instance.

     *

     * @return the name.

     */

    public String getName() ;

    /**

     * Returns an array of {@code OpenMBeanParameterInfo} instances

     * describing each parameter in the signature of the operation

     * described by this {@code OpenMBeanOperationInfo} instance.

     * Each instance in the returned array should actually be a

     * subclass of {@code MBeanParameterInfo} which implements the

     * {@code OpenMBeanParameterInfo} interface (typically {@link

     * OpenMBeanParameterInfoSupport}).

     *

     * @return the signature.

     */

    public MBeanParameterInfo[] getSignature() ;

    /**

     * Returns an {@code int} constant qualifying the impact of the

     * operation described by this {@code OpenMBeanOperationInfo}

     * instance.

     *

     * The returned constant is one of {@link

     * javax.management.MBeanOperationInfo#INFO}, {@link

     * javax.management.MBeanOperationInfo#ACTION}, {@link

     * javax.management.MBeanOperationInfo#ACTION_INFO}, or {@link

     * javax.management.MBeanOperationInfo#UNKNOWN}.

     *

     * @return the impact code.

     */

    public int getImpact() ;

    /**

     * Returns the fully qualified Java class name of the values

     * returned by the operation described by this

     * {@code OpenMBeanOperationInfo} instance.  This method should

     * return the same value as a call to

     * {@code getReturnOpenType().getClassName()}.

     *

     * @return the return type.

     */

    public String getReturnType() ;

    // Now declares methods that are specific to open MBeans

    //

    /**

     * Returns the <i>open type</i> of the values returned by the

     * operation described by this {@code OpenMBeanOperationInfo}

     * instance.

     *

     * @return the return type.

     */

    public OpenType<?> getReturnOpenType() ; // open MBean specific method

    // commodity methods

    //

    /**

     * Compares the specified <var>obj</var> parameter with this {@code OpenMBeanOperationInfo} instance for equality.

     * <p>

     * Returns {@code true} if and only if all of the following statements are true:

     * <ul>

     * <li><var>obj</var> is non null,</li>

     * <li><var>obj</var> also implements the {@code OpenMBeanOperationInfo} interface,</li>

     * <li>their names are equal</li>

     * <li>their signatures are equal</li>

     * <li>their return open types are equal</li>

     * <li>their impacts are equal</li>

     * </ul>

     * This ensures that this {@code equals} method works properly for <var>obj</var> parameters which are

     * different implementations of the {@code OpenMBeanOperationInfo} interface.

     * <br>&nbsp;

     * @param  obj  the object to be compared for equality with this {@code OpenMBeanOperationInfo} instance;

     *

     * @return  {@code true} if the specified object is equal to this {@code OpenMBeanOperationInfo} instance.

     */

    public boolean equals(Object obj);

    /**

     * Returns the hash code value for this {@code OpenMBeanOperationInfo} instance.

     * <p>

     * The hash code of an {@code OpenMBeanOperationInfo} instance is the sum of the hash codes

     * of all elements of information used in {@code equals} comparisons

     * (ie: its name, return open type, impact and signature,

     * where the signature hashCode is calculated by a call to

     * {@code java.util.Arrays.asList(this.getSignature).hashCode()}).

     * <p>

     * This ensures that {@code t1.equals(t2)} implies that {@code t1.hashCode()==t2.hashCode()}

     * for any two {@code OpenMBeanOperationInfo} instances {@code t1} and {@code t2},

     * as required by the general contract of the method

     * {@link Object#hashCode() Object.hashCode()}.

     *

     *

     * @return  the hash code value for this {@code OpenMBeanOperationInfo} instance

     */

    public int hashCode();

    /**

     * Returns a string representation of this {@code OpenMBeanOperationInfo} instance.

     * <p>

     * The string representation consists of the name of this class

     * (ie {@code javax.management.openmbean.OpenMBeanOperationInfo}),

     * and the name, signature, return open type and impact of the described operation.

     *

     * @return  a string representation of this {@code OpenMBeanOperationInfo} instance

     */

    public String toString();

}