Better indexing for string properties to support path-based lookups

- Normal prefix-index has been shortened to 32 chars (from 64)
 - Added a fully indexed 'string_end' column of 16 characters
 - iBatis queries are optimized to pull short strings from the index
 - Long paths and NodeRefs are well-indexed using this approach


git-svn-id: https://svn.alfresco.com/repos/alfresco-enterprise/alfresco/HEAD/root@15833 c4b6b30b-aa2e-2d43-bbcb-ca4b014f7261

source/java/org/alfresco/repo/domain/propval/PropertyStringValueEntity.java

@@ -37,6 +37,7 @@ public class PropertyStringValueEntity
 {
     private Long id;
     private String stringValue;
+    private String stringEnd;
     
     public PropertyStringValueEntity()
     {
@@ -81,6 +82,23 @@ public class PropertyStringValueEntity
     {
         return new Pair<Long, String>(id, stringValue);
     }
+    
+    /**
+     * Set the string and string-end values
+     */
+    public void setValue(String value)
+    {
+        this.stringValue = value;
+        int len = stringValue.length();
+        if (len > 16)
+        {
+            stringEnd = stringValue.substring(len - 16);
+        }
+        else
+        {
+            stringEnd = stringValue;
+        }
+    }
 
     public Long getId()
     {
@@ -101,4 +119,14 @@ public class PropertyStringValueEntity
     {
         this.stringValue = stringValue;
     }
+    
+    public String getStringEnd()
+    {
+        return stringEnd;
+    }
+
+    public void setStringEnd(String stringEnd)
+    {
+        this.stringEnd = stringEnd;
+    }
 }