JAL-3664 support for user.home, user.dir, user

[jalview.git] / src / jalview / datamodel / features / FeatureAttributes.java

diff --git a/src/jalview/datamodel/features/FeatureAttributes.java b/src/jalview/datamodel/features/FeatureAttributes.java
index bcf404b..655d1eb 100644 (file)
--- a/src/jalview/datamodel/features/FeatureAttributes.java
+++ b/src/jalview/datamodel/features/FeatureAttributes.java
@@ -29,17 +29,29 @@ import java.util.Map;
 import java.util.Map.Entry;
 import java.util.TreeMap;
 
+import jalview.bin.ApplicationSingletonProvider;
+import jalview.bin.ApplicationSingletonProvider.ApplicationSingletonI;
+
 /**
  * A singleton class to hold the set of attributes known for each feature type
  */
-public class FeatureAttributes
+public class FeatureAttributes implements ApplicationSingletonI
 {
   public enum Datatype
   {
     Character, Number, Mixed
   }
 
-  private static FeatureAttributes instance = new FeatureAttributes();
+  public static FeatureAttributes getInstance()
+  {
+    return (FeatureAttributes) ApplicationSingletonProvider
+            .getInstance(FeatureAttributes.class);
+  }
+
+  private FeatureAttributes()
+  {
+    attributes = new HashMap<>();
+  }
 
   /*
    * map, by feature type, of a map, by attribute name, of
@@ -125,7 +137,7 @@ public class FeatureAttributes
          * Parse numeric value unless we have previously
          * seen text data for this attribute type
          */
-        if (type == null || type == Datatype.Number)
+        if (type == null && couldBeNumber(value) || type == Datatype.Number)
         {
           try
           {
@@ -193,21 +205,6 @@ public class FeatureAttributes
   }
 
   /**
-   * Answers the singleton instance of this class
-   * 
-   * @return
-   */
-  public static FeatureAttributes getInstance()
-  {
-    return instance;
-  }
-
-  private FeatureAttributes()
-  {
-    attributes = new HashMap<>();
-  }
-
-  /**
    * Answers the attribute names known for the given feature type, in
    * alphabetical order (not case sensitive), or an empty set if no attributes
    * are known. An attribute name is typically 'simple' e.g. "AC", but may be
@@ -227,6 +224,27 @@ public class FeatureAttributes
   }
 
   /**
+   * This quick check will save significant time avoiding numerous NumberFormatExceptions.
+   * 
+   * @param f
+   * @return
+   */
+  public boolean couldBeNumber(String f)
+  {
+    int len = f.length();
+    if (len == 0)
+      return false;
+    char ch = f.charAt(0);
+    switch (ch) {
+    case '.':
+    case '+':
+    case '-':
+      return len > 1;
+    }
+    return (ch <= '9' &&  ch >= '0');
+  }
+
+  /**
    * Answers true if at least one attribute is known for the given feature type,
    * else false
    *