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git-svn-id: https://svn.code.sf.net/p/jode/code/trunk@946 379699f6-c40d-0410-875b-85095c16579e
stable
jochen 25 years ago
parent 1b3a2fb9cc
commit edca6f13fa
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  1. 134
      jode/jode/util/BasicMapEntry.java
  2. 1380
      jode/jode/util/TreeMap.java
  3. 331
      jode/jode/util/TreeSet.java

134
jode/jode/util/BasicMapEntry.java
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// This class is taken from the Classpath project.
// Please note the different copyright holder!
// The changes I did is this comment, the package line, some
// imports from java.util and some minor jdk12 -> jdk11 fixes.
// -- Jochen Hoenicke <jochen@gnu.org>
/////////////////////////////////////////////////////////////////////////////
// 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 jode.util;
/**
* a class which implements Map.Entry
*
* @author Jon Zeppieri
* @version $Revision$
* @modified $Id$
*/
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;
}
}

1380
jode/jode/util/TreeMap.java
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331
jode/jode/util/TreeSet.java
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// This class is taken from the Classpath project.
// Please note the different copyright holder!
// The changes I did is this comment, the package line, some
// imports from java.util and some minor jdk12 -> jdk11 fixes.
// -- Jochen Hoenicke <jochen@gnu.org>
/////////////////////////////////////////////////////////////////////////////
// TreeSet.java -- a class providing a TreeMap-backet SortedSet
//
// Copyright (c) 1999 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 jode.util;
import java.io.IOException;
import java.io.Serializable;
import java.io.ObjectInputStream;
import java.io.ObjectOutputStream;
/**
* This class provides a TreeMap-backed implementation of the
* SortedSet interface.
*
* Each element in the Set is a key in the backing TreeMap; each key
* maps to a static token, denoting that the key does, in fact, exist.
*
* Most operations are O(log n).
*
* TreeSet is a part of the JDK1.2 Collections API.
*
* @author Jon Zeppieri
* @version $Revision$
* @modified $Id$
*/
public class TreeSet extends AbstractSet
implements SortedSet, Cloneable, Serializable
{
// INSTANCE VARIABLES -------------------------------------------------
/** The TreeMap which backs this Set */
transient SortedMap _oMap;
static final long serialVersionUID = -2479143000061671589L;
// CONSTRUCTORS -------------------------------------------------------
/**
* Construct a new TreeSet whose backing TreeMap using the "natural" ordering
* of keys.
*/
public TreeSet()
{
this((Comparator) null);
}
/**
* Construct a new TreeSet whose backing TreeMap uses the supplied
* Comparator.
*
* @param oComparator the Comparator this Set will use
*/
public TreeSet(Comparator oComparator)
{
_oMap = new TreeMap(oComparator);
}
/**
* Construct a new TreeSet whose backing TreeMap uses the "natural"
* orering of the keys and which contains all of the elements in the
* supplied Collection.
*
* @param oCollection the new Set will be initialized with all
* of the elements in this Collection
*/
public TreeSet(Collection oCollection)
{
this((Comparator) null);
addAll(oCollection);
}
/**
* Construct a new TreeSet, using the same key ordering as the supplied
* SortedSet and containing all of the elements in the supplied SortedSet.
* This constructor runs in linear time.
*
* @param oSortedSet the new TreeSet will use this SortedSet's
* comparator and will initialize itself
* with all of the elements in this SortedSet
*/
public TreeSet(SortedSet oSortedSet)
{
this(oSortedSet.comparator());
TreeMap oMap = (TreeMap) _oMap;
int i = 0;
Map.Entry[] arEntries = new Map.Entry[oSortedSet.size()];
Iterator itEntries = oSortedSet.iterator();
while (itEntries.hasNext())
arEntries[i++] = new BasicMapEntry(itEntries.next(), Boolean.TRUE);
oMap._iSize = i;
oMap.putAllLinear(arEntries);
}
TreeSet(SortedMap oMap)
{
_oMap = oMap;
}
// METHODS -----------------------------------------------------------
/**
* Adds the spplied Object to the Set if it is not already in the Set;
* returns true if the element is added, false otherwise
*
* @param oObject the Object to be added to this Set
*/
public boolean add(Object oObject)
{
if (_oMap.containsKey(oObject))
{
return false;
}
else
{
internalAdd(_oMap, oObject);
return true;
}
}
/**
* Adds all of the elements in the supplied Collection to this TreeSet.
*
* @param oCollection All of the elements in this Collection
* will be added to the Set.
*
* @return true if the Set is altered, false otherwise
*/
public boolean addAll(Collection oCollection)
{
boolean boResult = false;
Iterator itElements = oCollection.iterator();
while (itElements.hasNext())
boResult = (boResult || add(itElements.next()));
return boResult;
}
/**
* Removes all elements in this Set.
*/
public void clear()
{
_oMap.clear();
}
/** Returns a shallow copy of this Set. */
public Object clone()
{
TreeSet oClone;
try
{
oClone = (TreeSet) super.clone();
oClone._oMap = _oMap;
}
catch(CloneNotSupportedException e)
{
oClone = null;
}
return oClone;
}
/** Returns this Set's comparator */
public Comparator comparator()
{
return _oMap.comparator();
}
/**
* Returns true if this Set contains the supplied Object,
* false otherwise
*
* @param oObject the Object whose existence in the Set is
* being tested
*/
public boolean contains(Object oObject)
{
return _oMap.containsKey(oObject);
}
/** Returns true if this Set has size 0, false otherwise */
public boolean isEmpty()
{
return _oMap.isEmpty();
}
/** Returns the number of elements in this Set */
public int size()
{
return _oMap.size();
}
/**
* If the supplied Object is in this Set, it is removed, and true is
* returned; otherwise, false is returned.
*
* @param oObject the Object we are attempting to remove
* from this Set
*/
public boolean remove(Object oObject)
{
return (_oMap.remove(oObject) != null);
}
/** Returns the first (by order) element in this Set */
public Object first()
{
return _oMap.firstKey();
}
/** Returns the last (by order) element in this Set */
public Object last()
{
return _oMap.lastKey();
}
/**
* Returns a view of this Set including all elements in the interval
* [oFromElement, oToElement).
*
* @param oFromElement the resultant view will contain all
* elements greater than or equal to this
* element
* @param oToElement the resultant view will contain all
* elements less than this element
*/
public SortedSet subSet(Object oFromElement, Object oToElement)
{
return new TreeSet(_oMap.subMap(oFromElement, oToElement));
}
/**
* Returns a view of this Set including all elements less than oToElement
*
* @param oToElement the resultant view will contain all
* elements less than this element
*/
public SortedSet headSet(Object oToElement)
{
return new TreeSet(_oMap.headMap(oToElement));
}
/**
* Returns a view of this Set including all elements greater than or
* equal to oFromElement.
*
* @param oFromElement the resultant view will contain all
* elements greater than or equal to this
* element
*/
public SortedSet tailSet(Object oFromElement)
{
return new TreeSet(_oMap.tailMap(oFromElement));
}
/** Returns in Iterator over the elements in this TreeSet */
public Iterator iterator()
{
return _oMap.keySet().iterator();
}
private void writeObject(ObjectOutputStream oOut) throws IOException
{
Iterator itElements = iterator();
oOut.writeObject(comparator());
oOut.writeInt(size());
while (itElements.hasNext())
oOut.writeObject(itElements.next());
}
private void readObject(ObjectInputStream oIn)
throws IOException, ClassNotFoundException
{
int i;
Map.Entry[] arEntries;
TreeMap oMap;
Comparator oComparator = (Comparator) oIn.readObject();
int iSize = oIn.readInt();
arEntries = new Map.Entry[iSize];
for (i = 0; i < iSize; i++)
arEntries[iSize] = new BasicMapEntry(oIn.readObject(), Boolean.TRUE);
oMap = new TreeMap(oComparator);
oMap._iSize = iSize;
oMap.putAllLinear(arEntries);
_oMap = oMap;
}
/**
* adds the supplied element to this Set; this private method is used
* internally instead of add(), because add() can be overridden
* to do unexpected things
*
* @param o the Object to add to this Set
*/
private static final void internalAdd(Map oMap, Object oObject)
{
oMap.put(oObject, Boolean.TRUE);
}
}
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