edited for improving runtime performance.

git-svn-id: http://anonsvn.jboss.org/repos/javassist/trunk@88 30ef5769-5b8d-40dd-aea6-55b5d6557bb3

src/main/javassist/ClassPool.java

@@ -440,10 +440,10 @@ public class ClassPool {
 
     /* for CtClassType.getClassFile2().  Don't delegate to the parent.
      */
-    byte[] readSource(String classname)
-        throws NotFoundException, IOException, CannotCompileException
+    InputStream openClassfile(String classname)
+        throws NotFoundException
     {
-        return source.readSource(classname);
+        return source.openClassfile(classname);
     }
 
     void writeClassfile(String classname, OutputStream out)

src/main/javassist/ClassPoolTail.java

@@ -224,20 +224,6 @@ final class ClassPoolTail {
         packages.put(name, name);
     }
 
-    /**
-     * @return the contents of the class file. 
-     * @throws NotFoundException    if the file could not be found.
-     */
-    byte[] readSource(String classname)
-        throws NotFoundException, IOException, CannotCompileException
-    {
-        byte[] b = readClassfile(classname);
-        if (b == null)
-            throw new NotFoundException(classname);
-        else
-            return b;
-    }
-
     /**
      * This method does not close the output stream.
      */
@@ -275,32 +261,6 @@ final class ClassPoolTail {
     */
 
 
-    /**
-     * Obtains the contents of the class file for the class
-     * specified by <code>classname</code>.
-     *
-     * @param classname         a fully-qualified class name
-     * @return null                 if the file has not been found.
-     * @throws NotFoundException    if any error is reported by ClassPath.
-     */
-    private byte[] readClassfile(String classname)
-        throws NotFoundException, IOException
-    {
-        InputStream fin = openClassfile(classname);
-        if (fin == null)
-            return null;
-
-        byte[] b;
-        try {
-            b = readStream(fin);
-        }
-        finally {
-            fin.close();
-        }
-
-        return b;
-    }
-
     /**
      * Opens the class file for the class specified by
      * <code>classname</code>.
@@ -309,7 +269,7 @@ final class ClassPoolTail {
      * @return null                 if the file has not been found.
      * @throws NotFoundException    if any error is reported by ClassPath.
      */
-    private InputStream openClassfile(String classname)
+    InputStream openClassfile(String classname)
         throws NotFoundException
     {
         if (packages.get(classname) != null)

src/main/javassist/CtClassType.java

@@ -19,7 +19,6 @@ import javassist.bytecode.*;
 import javassist.compiler.Javac;
 import javassist.compiler.CompileError;
 import javassist.expr.ExprEditor;
-import java.io.ByteArrayInputStream;
 import java.io.InputStream;
 import java.io.DataInputStream;
 import java.io.DataOutputStream;
@@ -108,11 +107,14 @@ class CtClassType extends CtClass {
         if (classfile != null)
             return classfile;
 
+        InputStream fin = null;
         try {
-            byte[] b = classPool.readSource(getName());
-            DataInputStream dis
-                = new DataInputStream(new ByteArrayInputStream(b));
-            return (classfile = new ClassFile(dis));
+            fin = classPool.openClassfile(getName());
+            if (fin == null)
+                throw new NotFoundException(getName());
+
+            classfile = new ClassFile(new DataInputStream(fin));
+            return classfile;
         }
         catch (NotFoundException e) {
             throw new RuntimeException(e.toString());
@@ -120,8 +122,12 @@ class CtClassType extends CtClass {
         catch (IOException e) {
             throw new RuntimeException(e.toString());
         }
-        catch (CannotCompileException e) {
-            throw new RuntimeException(e.toString());
+        finally {
+            if (fin != null)
+                try {
+                    fin.close();
+                }
+                catch (IOException e) {}
         }
     }
 

src/main/javassist/bytecode/ConstPool.java

@@ -21,7 +21,7 @@ import java.io.ByteArrayOutputStream;
 import java.io.PrintWriter;
 import java.io.IOException;
 import java.util.Map;
-import java.util.Hashtable;
+import java.util.HashMap;
 import javassist.CtClass;
 
 /**
@@ -30,10 +30,9 @@ import javassist.CtClass;
 public final class ConstPool {
     LongVector items;
     int       numOfItems;
-    Hashtable classes;
-    Hashtable strings;
+    HashMap classes;
+    HashMap strings;
     int       thisClassInfo;
-    private static final int SIZE = 128;
 
     /**
      * <code>CONSTANT_Class</code>
@@ -103,7 +102,11 @@ public final class ConstPool {
      *                          pool table
      */
     public ConstPool(String thisclass) {
-        this();
+        items = new LongVector();
+        numOfItems = 0;
+        addItem(null);          // index 0 is reserved by the JVM.
+        classes = new HashMap();
+        strings = new HashMap();
         thisClassInfo = addClassInfo(thisclass);
     }
 
@@ -113,17 +116,12 @@ public final class ConstPool {
      * @param in        byte stream.
      */
     public ConstPool(DataInputStream in) throws IOException {
-        this();
-        read(in);
-    }
-
-    private ConstPool() {
-        items = new LongVector(SIZE);
-        numOfItems = 0;
-        addItem(null);          // index 0 is reserved by the JVM.
-        classes = new Hashtable();
-        strings = new Hashtable();
+        classes = new HashMap();
+        strings = new HashMap();
         thisClassInfo = 0;
+        /* read() initializes items and numOfItems, and do addItem(null).
+         */
+        read(in);
     }
 
     /**
@@ -861,6 +859,12 @@ public final class ConstPool {
 
     private void read(DataInputStream in) throws IOException {
         int n = in.readUnsignedShort();
+
+        int size = (n / LongVector.SIZE + 1) * LongVector.SIZE;
+        items = new LongVector(size);
+        numOfItems = 0;
+        addItem(null);          // index 0 is reserved by the JVM.
+
         while (--n > 0) {       // index 0 is reserved by JVM
             int tag = readOne(in);
             if ((tag == LongInfo.tag) || (tag == DoubleInfo.tag)) {

src/main/javassist/bytecode/LongVector.java

@@ -16,10 +16,15 @@
 package javassist.bytecode;
 
 final class LongVector {
+    static final int SIZE = 128;
     private int num;
     private Object[] objects;
     private LongVector next;
 
+    public LongVector() {
+        this(SIZE);
+    }
+
     public LongVector(int initialSize) {
         num = 0;
         objects = new Object[initialSize];
@@ -34,7 +39,7 @@ final class LongVector {
         if (p.num < p.objects.length)
             p.objects[p.num++] = obj;
         else {
-            LongVector q = p.next = new LongVector(p.objects.length);
+            LongVector q = p.next = new LongVector(SIZE);
             q.objects[q.num++] = obj;
         }
     }