added files:

BasicMapEntry.java, Bucket.java, Dictionary.java, HashMap.java,
 HashSet.java, Hashtable.java

1 files changed, 128 insertions, 0 deletions

diff --git a/java/util/BasicMapEntry.java b/java/util/BasicMapEntry.java
new file mode 100644
index 000000000..ea23cefed
--- /dev/null
+++ b/java/util/BasicMapEntry.java
@@ -0,0 +1,128 @@
+/////////////////////////////////////////////////////////////////////////////
+// BasicMapEntry.java -- a class providing a plain-vanilla implementation of
+//                       the Map.Entry interface; could be used anywhere in
+//                       java.util
+//
+// Copyright (c) 1998 by Jon A. Zeppieri (jon@eease.com)
+//
+// This program is free software; you can redistribute it and/or modify
+// it under the terms of the GNU Library General Public License as published
+// by the Free Software Foundation, version 2. (see COPYING.LIB)
+//
+// This program 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 Library General Public License for more details.
+//
+// You should have received a copy of the GNU Library General Public License
+// along with this program; if not, write to the Free Software Foundation
+// Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307 USA
+/////////////////////////////////////////////////////////////////////////////
+
+package java.util;
+
+/**
+ * a class which implements Map.Entry
+ *
+ * @author      Jon Zeppieri
+ * @version     $Revision: 1.1 $
+ * @modified    $Id: BasicMapEntry.java,v 1.1 1998-10-13 00:38:31 jaz Exp $
+ */
+class BasicMapEntry implements Map.Entry
+{
+    /** the key */
+    Object key;
+    /** the value */
+    Object value;
+    
+    /**
+     * construct a new BasicMapEntry with the given key and value
+     *
+     * @param     newKey       the key of this Entry
+     * @param     newValue     the value of this Entry
+     */
+    BasicMapEntry(Object newKey, Object newValue)
+    {
+	key = newKey;
+	value = newValue;
+    }
+    
+    /**
+     * returns true if <pre>o</pre> is a Map.Entry and 
+     * <pre> 
+     * (((o.getKey == null) ? (key == null) : 
+     * o.getKey().equals(key)) && 
+     * ((o.getValue() == null) ? (value == null) : 
+     * o.getValue().equals(value)))
+     * </pre>
+     *
+     * NOTE: the calls to getKey() and getValue() in this implementation
+     * are <i>NOT</i> superfluous and should not be removed.  They insure 
+     * that subclasses such as HashMapEntry work correctly
+     *
+     * @param      o        the Object being tested for equality
+     */
+    public boolean equals(Object o)
+    {
+	Map.Entry tester;
+	Object oTestingKey, oTestingValue;
+	Object oKey, oValue;
+	if (o instanceof Map.Entry)
+	    {
+		tester = (Map.Entry) o;
+		oKey = getKey();
+		oValue = getValue();
+		oTestingKey = tester.getKey();
+		oTestingValue = tester.getValue();
+		return (((oTestingKey == null) ? (oKey == null) : 
+			 oTestingKey.equals(oKey)) && 
+			((oTestingValue == null) ? (oValue == null) : 
+			 oTestingValue.equals(oValue)));
+	    }
+	    return false;
+    }
+
+    /** returns the key */
+    public Object getKey()
+	{
+	    return key;
+	}
+    
+    /** returns the value */
+    public Object getValue()
+    {
+	return value;
+    }
+    
+    /** the hashCode() for a Map.Entry is 
+     * <pre> 
+     * ((getKey() == null) ? 0 : getKey().hashCode()) ^ 
+     * ((getValue() == null) ? 0 : getValue().hashCode());
+     * </pre>
+     *
+     * NOTE: the calls to getKey() and getValue() in this implementation
+     * are <i>NOT</i> superfluous and should not be removed.  They insure 
+     * that subclasses such as HashMapEntry work correctly
+     */
+    public int hashCode()
+    {
+	Object oKey = getKey();
+	Object oValue = getValue();
+	return ((oKey == null) ? 0 : oKey.hashCode()) ^ 
+	    ((oValue == null) ? 0 : oValue.hashCode());
+    }
+    
+    /** 
+     * sets the value of this Map.Entry 
+     *
+     * @param     newValue         the new value of this Map.Entry
+     */
+    public Object setValue(Object newValue)
+	throws UnsupportedOperationException, ClassCastException, 
+	       IllegalArgumentException, NullPointerException
+    {
+	Object oVal = value;
+	value = newValue;
+	return oVal;
+    }
+}