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package org.hsqldb.lib;import org.hsqldb.store.BaseHashMap;/** * * @author fredt@users * @version 1.7.2 * @since 1.7.2 */public class IntKeyHashMap extends BaseHashMap {    Set        keySet;    Collection values;    public IntKeyHashMap() {        this(16, 0.75f);    }    public IntKeyHashMap(int initialCapacity)    throws IllegalArgumentException {        this(initialCapacity, 0.75f);    }    public IntKeyHashMap(int initialCapacity,                         float loadFactor) throws IllegalArgumentException {        super(initialCapacity, loadFactor, BaseHashMap.intKeyOrValue,              BaseHashMap.objectKeyOrValue, false);    }    public Object get(int key) {        int lookup = getLookup(key);        if (lookup != -1) {            return objectValueTable[lookup];        }        return null;    }    public Object put(int key, Object value) {        return super.addOrRemove(key, 0, null, value, false);    }    public boolean containsValue(Object value) {        return super.containsValue(value);    }    public Object remove(int key) {        return super.addOrRemove(key, 0, null, null, true);    }    public Set keySet() {        if (keySet == null) {            keySet = new KeySet();        }        return keySet;    }    public Collection values() {        if (values == null) {            values = new Values();        }        return values;    }    class KeySet implements Set {        public Iterator iterator() {            return IntKeyHashMap.this.new BaseHashIterator(true);        }        public int size() {            return IntKeyHashMap.this.size();        }        public boolean contains(Object o) {            throw new RuntimeException();        }        public Object get(Object key) {            throw new RuntimeException();        }        public boolean add(Object value) {            throw new RuntimeException();        }        public boolean addAll(Collection c) {            throw new RuntimeException();        }        public boolean remove(Object o) {            throw new RuntimeException();        }        public boolean isEmpty() {            return size() == 0;        }        public void clear() {            IntKeyHashMap.this.clear();        }    }    class Values implements Collection {        public Iterator iterator() {            return IntKeyHashMap.this.new BaseHashIterator(false);        }        public int size() {            return IntKeyHashMap.this.size();        }        public boolean contains(Object o) {            throw new RuntimeException();        }        public boolean add(Object value) {            throw new RuntimeException();        }        public boolean addAll(Collection c) {            throw new RuntimeException();        }        public boolean remove(Object o) {            throw new RuntimeException();        }        public boolean isEmpty() {            return size() == 0;        }        public void clear() {            IntKeyHashMap.this.clear();        }    }}