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 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License

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 * accompanied this code).

 *

 * You should have received a copy of the GNU General Public License version

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package javax.management.openmbean;

// java import

//

import java.util.Set;

import java.lang.Comparable; // to be substituted for jdk1.1.x

// jmx import

//

/**

 * <p>Describes a parameter used in one or more operations or

 * constructors of an open MBean.</p>

 *

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

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

 * interface (typically {@link OpenMBeanParameterInfoSupport}) should

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

 *

 *

 * @since 1.5

 */

public interface OpenMBeanParameterInfo {

    // Re-declares methods that are in class MBeanParameterInfo of JMX 1.0

    // (these will be removed when MBeanParameterInfo is made a parent interface of this interface)

    /**

     * Returns a human readable description of the parameter

     * described by this <tt>OpenMBeanParameterInfo</tt> instance.

     *

     * @return the description.

     */

    public String getDescription() ;

    /**

     * Returns the name of the parameter

     * described by this <tt>OpenMBeanParameterInfo</tt> instance.

     *

     * @return the name.

     */

    public String getName() ;

    // Now declares methods that are specific to open MBeans

    //

    /**

     * Returns the <i>open type</i> of the values of the parameter

     * described by this <tt>OpenMBeanParameterInfo</tt> instance.

     *

     * @return the open type.

     */

    public OpenType<?> getOpenType() ;

    /**

     * Returns the default value for this parameter, if it has one, or

     * <tt>null</tt> otherwise.

     *

     * @return the default value.

     */

    public Object getDefaultValue() ;

    /**

     * Returns the set of legal values for this parameter, if it has

     * one, or <tt>null</tt> otherwise.

     *

     * @return the set of legal values.

     */

    public Set<?> getLegalValues() ;

    /**

     * Returns the minimal value for this parameter, if it has one, or

     * <tt>null</tt> otherwise.

     *

     * @return the minimum value.

     */

    public Comparable<?> getMinValue() ;

    /**

     * Returns the maximal value for this parameter, if it has one, or

     * <tt>null</tt> otherwise.

     *

     * @return the maximum value.

     */

    public Comparable<?> getMaxValue() ;

    /**

     * Returns <tt>true</tt> if this parameter has a specified default

     * value, or <tt>false</tt> otherwise.

     *

     * @return true if there is a default value.

     */

    public boolean hasDefaultValue() ;

    /**

     * Returns <tt>true</tt> if this parameter has a specified set of

     * legal values, or <tt>false</tt> otherwise.

     *

     * @return true if there is a set of legal values.

     */

    public boolean hasLegalValues() ;

    /**

     * Returns <tt>true</tt> if this parameter has a specified minimal

     * value, or <tt>false</tt> otherwise.

     *

     * @return true if there is a minimum value.

     */

    public boolean hasMinValue() ;

    /**

     * Returns <tt>true</tt> if this parameter has a specified maximal

     * value, or <tt>false</tt> otherwise.

     *

     * @return true if there is a maximum value.

     */

    public boolean hasMaxValue() ;

    /**

     * Tests whether <var>obj</var> is a valid value for the parameter

     * described by this <code>OpenMBeanParameterInfo</code> instance.

     *

     * @param obj the object to be tested.

     *

     * @return <code>true</code> if <var>obj</var> is a valid value

     * for the parameter described by this

     * <code>OpenMBeanParameterInfo</code> instance,

     * <code>false</code> otherwise.

     */

    public boolean isValue(Object obj) ;

    /**

     * Compares the specified <var>obj</var> parameter with this <code>OpenMBeanParameterInfo</code> instance for equality.

     * <p>

     * Returns <tt>true</tt> 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>OpenMBeanParameterInfo</code> interface,</li>

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

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

     * <li>their default, min, max and legal values are equal.</li>

     * </ul>

     * This ensures that this <tt>equals</tt> method works properly for <var>obj</var> parameters which are

     * different implementations of the <code>OpenMBeanParameterInfo</code> interface.

     * <br>&nbsp;

     * @param  obj  the object to be compared for equality with this <code>OpenMBeanParameterInfo</code> instance;

     *

     * @return  <code>true</code> if the specified object is equal to this <code>OpenMBeanParameterInfo</code> instance.

     */

    public boolean equals(Object obj);

    /**

     * Returns the hash code value for this <code>OpenMBeanParameterInfo</code> instance.

     * <p>

     * The hash code of an <code>OpenMBeanParameterInfo</code> instance is the sum of the hash codes

     * of all elements of information used in <code>equals</code> comparisons

     * (ie: its name, its <i>open type</i>, and its default, min, max and legal values).

     * <p>

     * This ensures that <code> t1.equals(t2) </code> implies that <code> t1.hashCode()==t2.hashCode() </code>

     * for any two <code>OpenMBeanParameterInfo</code> instances <code>t1</code> and <code>t2</code>,

     * as required by the general contract of the method

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

     *

     * @return  the hash code value for this <code>OpenMBeanParameterInfo</code> instance

     */

    public int hashCode();

    /**

     * Returns a string representation of this <code>OpenMBeanParameterInfo</code> instance.

     * <p>

     * The string representation consists of the name of this class (ie <code>javax.management.openmbean.OpenMBeanParameterInfo</code>),

     * the string representation of the name and open type of the described parameter,

     * and the string representation of its default, min, max and legal values.

     *

     * @return  a string representation of this <code>OpenMBeanParameterInfo</code> instance

     */

    public String toString();

}