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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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*
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* accompanied this code).
*
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package javax.management.openmbean;
// java import
//
import java.util.Collection;
// jmx import
//
/**
* The {@code CompositeData} interface specifies
* the behavior of a specific type of complex <i>open data</i> objects
* which represent <i>composite data</i> structures.
*
*
* @since 1.5
*/
public interface CompositeData {
/**
* Returns the <i>composite type </i> of this <i>composite data</i> instance.
*
* @return the type of this CompositeData.
*/
public CompositeType getCompositeType();
/**
* Returns the value of the item whose name is {@code key}.
*
* @param key the name of the item.
*
* @return the value associated with this key.
*
* @throws IllegalArgumentException if {@code key} is a null or empty String.
*
* @throws InvalidKeyException if {@code key} is not an
* existing item name for this {@code CompositeData} instance.
*/
public Object get(String key) ;
/**
* Returns an array of the values of the items whose names
* are specified by {@code keys}, in the same order as {@code keys}.
*
* @param keys the names of the items.
*
* @return the values corresponding to the keys.
*
* @throws IllegalArgumentException if an element in {@code keys} is a null or empty String.
*
* @throws InvalidKeyException if an element in {@code keys}
* is not an existing item name for this {@code CompositeData} instance.
*/
public Object[] getAll(String[] keys) ;
/**
* Returns {@code true} if and only if this {@code CompositeData} instance contains
* an item whose name is {@code key}.
* If {@code key} is a null or empty String, this method simply returns false.
*
* @param key the key to be tested.
*
* @return true if this {@code CompositeData} contains the key.
*/
public boolean containsKey(String key) ;
/**
* Returns {@code true} if and only if this {@code CompositeData} instance contains an item
* whose value is {@code value}.
*
* @param value the value to be tested.
*
* @return true if this {@code CompositeData} contains the value.
*/
public boolean containsValue(Object value) ;
/**
* Returns an unmodifiable Collection view of the item values
* contained in this {@code CompositeData} instance.
* The returned collection's iterator will return the values
* in the ascending lexicographic order of the corresponding
* item names.
*
* @return the values.
*/
public Collection<?> values() ;
/**
* Compares the specified <var>obj</var> parameter with this
* {@code CompositeData} 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 CompositeData} interface,</li>
* <li>their composite types are equal</li>
* <li>their contents, i.e. (name, value) pairs are equal. If a value contained in
* the content is an array, the value comparison is done as if by calling
* the {@link java.util.Arrays#deepEquals(Object[], Object[]) deepEquals} method
* for arrays of object reference types or the appropriate overloading of
* {@code Arrays.equals(e1,e2)} for arrays of primitive types</li>
* </ul>
* <p>
* This ensures that this {@code equals} method works properly for
* <var>obj</var> parameters which are different implementations of the
* {@code CompositeData} interface, with the restrictions mentioned in the
* {@link java.util.Collection#equals(Object) equals}
* method of the {@code java.util.Collection} interface.
*
* @param obj the object to be compared for equality with this
* {@code CompositeData} instance.
* @return {@code true} if the specified object is equal to this
* {@code CompositeData} instance.
*/
public boolean equals(Object obj) ;
/**
* Returns the hash code value for this {@code CompositeData} instance.
* <p>
* The hash code of a {@code CompositeData} instance is the sum of the hash codes
* of all elements of information used in {@code equals} comparisons
* (ie: its <i>composite type</i> and all the item values).
* <p>
* This ensures that {@code t1.equals(t2)} implies that {@code t1.hashCode()==t2.hashCode()}
* for any two {@code CompositeData} instances {@code t1} and {@code t2},
* as required by the general contract of the method
* {@link Object#hashCode() Object.hashCode()}.
* <p>
* Each item value's hash code is added to the returned hash code.
* If an item value is an array,
* its hash code is obtained as if by calling the
* {@link java.util.Arrays#deepHashCode(Object[]) deepHashCode} method
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