8012656: cache frequently used name strings for DocImpl classes

Reviewed-by: darcy

langtools/src/share/classes/com/sun/tools/javadoc/ClassDocImpl.java

@@ -341,8 +341,13 @@ public class ClassDocImpl extends ProgramElementDocImpl implements ClassDoc {
      * </pre>
      */
     public String name() {
-        return getClassName(tsym, false);
+        if (name == null) {
+            name = getClassName(tsym, false);
         }
+        return name;
+    }
+
+    private String name;
 
     /**
      * Return the qualified class name as a String.
@@ -354,8 +359,13 @@ public class ClassDocImpl extends ProgramElementDocImpl implements ClassDoc {
      * </pre>
      */
     public String qualifiedName() {
-        return getClassName(tsym, true);
+        if (qualifiedName == null) {
+            qualifiedName = getClassName(tsym, true);
         }
+        return qualifiedName;
+    }
+
+    private String qualifiedName;
 
     /**
      * Return unqualified name of type excluding any dimension information.
@@ -380,8 +390,13 @@ public class ClassDocImpl extends ProgramElementDocImpl implements ClassDoc {
      * Return the simple name of this type.
      */
     public String simpleTypeName() {
-        return tsym.name.toString();
+        if (simpleTypeName == null) {
+            simpleTypeName = tsym.name.toString();
         }
+        return simpleTypeName;
+    }
+
+    private String simpleTypeName;
 
     /**
      * Return the qualified name and any type parameters.

langtools/src/share/classes/com/sun/tools/javadoc/FieldDocImpl.java

@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 1997, 2012, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 1997, 2013, Oracle and/or its affiliates. All rights reserved.
  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
  *
  * This code is free software; you can redistribute it and/or modify it
@@ -252,12 +252,22 @@ public class FieldDocImpl extends MemberDocImpl implements FieldDoc {
     }
 
     public String name() {
-        return sym.name.toString();
+        if (name == null) {
+            name = sym.name.toString();
+        }
+        return name;
     }
 
+    private String name;
+
     public String qualifiedName() {
-        return sym.enclClass().getQualifiedName() + "." + name();
+        if (qualifiedName == null) }
+            qualifiedName = sym.enclClass().getQualifiedName() + "." + name();
         }
+        return qualifiedName;
+    }
+
+    private String qualifiedName;
 
     /**
      * Return the source position of the entity, or null if

langtools/src/share/classes/com/sun/tools/javadoc/MethodDocImpl.java

@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 1997, 2012, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 1997, 2013, Oracle and/or its affiliates. All rights reserved.
  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
  *
  * This code is free software; you can redistribute it and/or modify it
@@ -203,12 +203,22 @@ public class MethodDocImpl
 
 
     public String name() {
-        return sym.name.toString();
+        if (name == null) {
+            name = sym.name.toString();
+        }
+        return name;
     }
 
+    private String name;
+
     public String qualifiedName() {
-        return sym.enclClass().getQualifiedName() + "." + sym.name;
+        if (qualifiedName == null) {
+            qualifiedName =  sym.enclClass().getQualifiedName() + "." + sym.name;
         }
+        return qualifiedName;
+    }
+
+    private String qualifiedName;
 
     /**
      * Returns a string representation of this method.  Includes the

langtools/src/share/classes/com/sun/tools/javadoc/PackageDocImpl.java

@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 1997, 2012, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 1997, 2013, Oracle and/or its affiliates. All rights reserved.
  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
  *
  * This code is free software; you can redistribute it and/or modify it
@@ -334,11 +334,16 @@ public class PackageDocImpl extends DocImpl implements PackageDoc {
      * Get package name.
      */
     public String qualifiedName() {
+        if (qualifiedName == null) {
             Name fullname = sym.getQualifiedName();
             // Some bogus tests depend on the interned "" being returned.
             // See 6457276.
-        return fullname.isEmpty() ? "" : fullname.toString();
+            qualifiedName = fullname.isEmpty() ? "" : fullname.toString();
         }
+        return qualifiedName;
+    }
+
+    private String qualifiedName;
 
     /**
      * set doc path for an unzipped directory