first commit

hrmsEjb/org/apache/xerces/util/SymbolHash.java

@@ -0,0 +1,105 @@
+package org.apache.xerces.util;
+
+public class SymbolHash {
+  protected int fTableSize = 101;
+  
+  protected Entry[] fBuckets;
+  
+  protected int fNum = 0;
+  
+  public SymbolHash() {
+    this.fBuckets = new Entry[this.fTableSize];
+  }
+  
+  public SymbolHash(int size) {
+    this.fTableSize = size;
+    this.fBuckets = new Entry[this.fTableSize];
+  }
+  
+  public void put(Object key, Object value) {
+    int bucket = (key.hashCode() & Integer.MAX_VALUE) % this.fTableSize;
+    Entry entry = search(key, bucket);
+    if (entry != null) {
+      entry.value = value;
+    } else {
+      entry = new Entry(key, value, this.fBuckets[bucket]);
+      this.fBuckets[bucket] = entry;
+      this.fNum++;
+    } 
+  }
+  
+  public Object get(Object key) {
+    int bucket = (key.hashCode() & Integer.MAX_VALUE) % this.fTableSize;
+    Entry entry = search(key, bucket);
+    if (entry != null)
+      return entry.value; 
+    return null;
+  }
+  
+  public int getLength() {
+    return this.fNum;
+  }
+  
+  public int getValues(Object[] elements, int from) {
+    for (int i = 0, j = 0; i < this.fTableSize && j < this.fNum; i++) {
+      for (Entry entry = this.fBuckets[i]; entry != null; entry = entry.next) {
+        elements[from + j] = entry.value;
+        j++;
+      } 
+    } 
+    return this.fNum;
+  }
+  
+  public SymbolHash makeClone() {
+    SymbolHash newTable = new SymbolHash(this.fTableSize);
+    newTable.fNum = this.fNum;
+    for (int i = 0; i < this.fTableSize; i++) {
+      if (this.fBuckets[i] != null)
+        newTable.fBuckets[i] = this.fBuckets[i].makeClone(); 
+    } 
+    return newTable;
+  }
+  
+  public void clear() {
+    for (int i = 0; i < this.fTableSize; i++)
+      this.fBuckets[i] = null; 
+    this.fNum = 0;
+  }
+  
+  protected Entry search(Object key, int bucket) {
+    for (Entry entry = this.fBuckets[bucket]; entry != null; entry = entry.next) {
+      if (key.equals(entry.key))
+        return entry; 
+    } 
+    return null;
+  }
+  
+  protected static final class Entry {
+    public Object key;
+    
+    public Object value;
+    
+    public Entry next;
+    
+    public Entry() {
+      this.key = null;
+      this.value = null;
+      this.next = null;
+    }
+    
+    public Entry(Object key, Object value, Entry next) {
+      this.key = key;
+      this.value = value;
+      this.next = next;
+    }
+    
+    public Entry makeClone() {
+      Entry entry = new Entry();
+      entry.key = this.key;
+      entry.value = this.value;
+      if (this.next != null)
+        entry.next = this.next.makeClone(); 
+      return entry;
+    }
+  }
+}