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////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
// Copyright (c) 2018-2022 Saxonica Limited
// This Source Code Form is subject to the terms of the Mozilla Public License, v. 2.0.
// If a copy of the MPL was not distributed with this file, You can obtain one at http://mozilla.org/MPL/2.0/.
// This Source Code Form is "Incompatible With Secondary Licenses", as defined by the Mozilla Public License, v. 2.0.
////////////////////////////////////////////////////////////////////////////////////////////////////////////////////

package net.sf.saxon.z;

/**
 * Interface defining a map from integers to integers
 */
public interface IntToIntMap {
    /**
     * Set the value to be returned to indicate an unused entry
     *
     * @param defaultValue the value to be returned by {@link #get(int)} if no entry
     *                     exists for the supplied key
     */
    void setDefaultValue(int defaultValue);

    /**
     * Get the default value used to indicate an unused entry
     *
     * @return the value to be returned by {@link #get(int)} if no entry
     *         exists for the supplied key
     */

    int getDefaultValue();

    /**
     * Clear the map.
     */
    void clear();

    /**
     * Finds whether a key is present in the map.
     *
     * @param key Key
     * @return true if the key is mapped
     */
    boolean contains(int key);

    /**
     * Gets the value for this key.
     *
     * @param key Key
     * @return the value, or the default value if not found.
     */
    int get(int key);

    /**
     * Gets the size of the map.
     *
     * @return the size
     */
    int size();

    /**
     * Removes a key from the map.
     *
     * @param key Key to remove
     * @return true if the value was removed
     */
    boolean remove(int key);

    /**
     * Adds a key-value pair to the map.
     *
     * @param key   Key
     * @param value Value
     */
    void put(int key, int value);

    /**
     * Get an iterator over the integer key values held in the hash map
     *
     * @return an iterator whose next() call returns the key values (in arbitrary order)
     */

    /*@NotNull*/ IntIterator keyIterator();
}