Tidy up some of the IntMapper/UnicodeString bits with generics

git-svn-id: https://svn.apache.org/repos/asf/poi/trunk@900376 13f79535-47bb-0310-9956-ffa450edef68

src/java/org/apache/poi/hssf/record/SSTDeserializer.java

@@ -31,9 +31,9 @@ import org.apache.poi.util.IntMapper;
 class SSTDeserializer
 {
 
-    private IntMapper strings;
+    private IntMapper<UnicodeString> strings;
 
-    public SSTDeserializer( IntMapper strings )
+    public SSTDeserializer( IntMapper<UnicodeString> strings )
     {
         this.strings = strings;
     }
@@ -46,14 +46,14 @@ class SSTDeserializer
     public void manufactureStrings( int stringCount, RecordInputStream in )
     {
       for (int i=0;i<stringCount;i++) {
-        //Extract exactly the count of strings from the SST record.
+         // Extract exactly the count of strings from the SST record.
          UnicodeString str = new UnicodeString(in);
          addToStringTable( strings, str );
       }
     }
 
-    static public void addToStringTable( IntMapper strings, UnicodeString string )
+    static public void addToStringTable( IntMapper<UnicodeString> strings, UnicodeString string )
     {
-      strings.add(string );
-            }
+      strings.add(string);
     }
+}

src/java/org/apache/poi/hssf/record/SSTRecord.java

@@ -60,7 +60,7 @@ public final class SSTRecord extends ContinuableRecord {
 
     /** according to docs ONLY SST */
     private int field_2_num_unique_strings;
-    private IntMapper field_3_strings;
+    private IntMapper<UnicodeString> field_3_strings;
 
     private SSTDeserializer deserializer;
 
@@ -73,7 +73,7 @@ public final class SSTRecord extends ContinuableRecord {
     {
         field_1_num_strings = 0;
         field_2_num_unique_strings = 0;
-        field_3_strings = new IntMapper();
+        field_3_strings = new IntMapper<UnicodeString>();
         deserializer = new SSTDeserializer(field_3_strings);
     }
 
@@ -130,7 +130,7 @@ public final class SSTRecord extends ContinuableRecord {
      */
     public UnicodeString getString(int id )
     {
-        return (UnicodeString) field_3_strings.get( id );
+        return field_3_strings.get( id );
     }
 
 
@@ -149,7 +149,7 @@ public final class SSTRecord extends ContinuableRecord {
                 .append( Integer.toHexString( getNumUniqueStrings() ) ).append( "\n" );
         for ( int k = 0; k < field_3_strings.size(); k++ )
         {
-          UnicodeString s = (UnicodeString)field_3_strings.get( k );
+          UnicodeString s = field_3_strings.get( k );
             buffer.append( "    .string_" + k + "      = " )
                     .append( s.getDebugInfo() ).append( "\n" );
         }
@@ -245,7 +245,7 @@ public final class SSTRecord extends ContinuableRecord {
         // we initialize our fields
         field_1_num_strings = in.readInt();
         field_2_num_unique_strings = in.readInt();
-        field_3_strings = new IntMapper();
+        field_3_strings = new IntMapper<UnicodeString>();
         deserializer = new SSTDeserializer(field_3_strings);
         deserializer.manufactureStrings( field_2_num_unique_strings, in );
     }
@@ -255,7 +255,7 @@ public final class SSTRecord extends ContinuableRecord {
      * @return an iterator of the strings we hold. All instances are
      *         UnicodeStrings
      */
-    Iterator getStrings()
+    Iterator<UnicodeString> getStrings()
     {
         return field_3_strings.iterator();
     }

src/java/org/apache/poi/hssf/record/SSTSerializer.java

@@ -32,7 +32,7 @@ final class SSTSerializer {
 	private final int _numStrings;
 	private final int _numUniqueStrings;
 
-    private final IntMapper strings;
+    private final IntMapper<UnicodeString> strings;
 
     /** Offsets from the beginning of the SST record (even across continuations) */
     private final int[] bucketAbsoluteOffsets;
@@ -40,7 +40,7 @@ final class SSTSerializer {
     private final int[] bucketRelativeOffsets;
     int startOfSST, startOfRecord;
 
-    public SSTSerializer( IntMapper strings, int numStrings, int numUniqueStrings )
+    public SSTSerializer( IntMapper<UnicodeString> strings, int numStrings, int numUniqueStrings )
     {
         this.strings = strings;
 		_numStrings = numStrings;
@@ -78,9 +78,9 @@ final class SSTSerializer {
         return getUnicodeString(strings, index);
     }
 
-    private static UnicodeString getUnicodeString( IntMapper strings, int index )
+    private static UnicodeString getUnicodeString( IntMapper<UnicodeString> strings, int index )
     {
-        return ( (UnicodeString) strings.get( index ) );
+        return ( strings.get( index ) );
     }
 
     public int[] getBucketAbsoluteOffsets()

src/java/org/apache/poi/hssf/record/common/UnicodeString.java

@@ -34,10 +34,9 @@ import org.apache.poi.util.LittleEndianOutput;
  * Title: Unicode String<p/>
  * Description:  Unicode String - just standard fields that are in several records.
  *               It is considered more desirable then repeating it in all of them.<p/>
+ *               This is often called a XLUnicodeRichExtendedString in MS documentation.<p/>
  * REFERENCE:  PG 264 Microsoft Excel 97 Developer's Kit (ISBN: 1-57231-498-2)<p/>
- * @author  Andrew C. Oliver
- * @author Marc Johnson (mjohnson at apache dot org)
- * @author Glen Stampoultzis (glens at apache.org)
+ * REFERENCE:  PG 951 Excel Binary File Format (.xls) Structure Specification v20091214 
  */
 public final class UnicodeString implements Comparable<UnicodeString> {
     private short             field_1_charCount;
@@ -46,6 +45,7 @@ public final class UnicodeString implements Comparable<UnicodeString> {
     private List<FormatRun> field_4_format_runs;
     private byte[] field_5_ext_rst;
     private static final BitField   highByte  = BitFieldFactory.getInstance(0x1);
+    // 0x2 is reserved
     private static final BitField   extBit    = BitFieldFactory.getInstance(0x4);
     private static final BitField   richText  = BitFieldFactory.getInstance(0x8);
 

src/java/org/apache/poi/util/IntMapper.java

@@ -34,10 +34,10 @@ import java.util.*;
  * @author Jason Height
  */
 
-public class IntMapper
+public class IntMapper<T>
 {
-  private List elements;
-  private Map valueKeyMap;
+  private List<T> elements;
+  private Map<T,Integer> valueKeyMap;
 
   private static final int _default_size = 10;
 
@@ -52,8 +52,8 @@ public class IntMapper
 
     public IntMapper(final int initialCapacity)
     {
-        elements = new ArrayList(initialCapacity);
-        valueKeyMap = new HashMap(initialCapacity);
+        elements = new ArrayList<T>(initialCapacity);
+        valueKeyMap = new HashMap<T,Integer>(initialCapacity);
     }
 
     /**
@@ -64,12 +64,11 @@ public class IntMapper
      * @return true (as per the general contract of the Collection.add
      *         method).
      */
-
-    public boolean add(final Object value)
+    public boolean add(final T value)
     {
       int index = elements.size();
       elements.add(value);
-      valueKeyMap.put(value, Integer.valueOf(index));
+      valueKeyMap.put(value, index);
       return true;
     }
 
@@ -77,18 +76,18 @@ public class IntMapper
       return elements.size();
     }
 
-    public Object get(int index) {
+    public T get(int index) {
       return elements.get(index);
     }
 
-    public int getIndex(Object o) {
-      Integer i = ((Integer)valueKeyMap.get(o));
+    public int getIndex(T o) {
+      Integer i = valueKeyMap.get(o);
       if (i == null)
         return -1;
       return i.intValue();
     }
 
-    public Iterator iterator() {
+    public Iterator<T> iterator() {
       return elements.iterator();
     }
 }   // end public class IntMapper