updates ConstPool to support Module and Package

.gitignore

@@ -4,6 +4,7 @@ target/
 runtest/
 html/
 lib/
+tmp/
 
 .DS_Store
 .classpath

src/main/javassist/bytecode/AccessFlag.java

@@ -41,12 +41,13 @@ public class AccessFlag {
     public static final int MANDATED  = 0x8000;
 
     public static final int SUPER     = 0x0020;
+    public static final int MODULE    = 0x8000;
 
     // Note: 0x0020 is assigned to both ACC_SUPER and ACC_SYNCHRONIZED
     // although java.lang.reflect.Modifier does not recognize ACC_SUPER.
 
     /**
-     * Truns the public bit on.  The protected and private bits are
+     * Turns the public bit on.  The protected and private bits are
      * cleared.
      */
     public static int setPublic(int accflags) {
@@ -54,7 +55,7 @@ public class AccessFlag {
     }
 
     /**
-     * Truns the protected bit on.  The protected and public bits are
+     * Turns the protected bit on.  The protected and public bits are
      * cleared.
      */
     public static int setProtected(int accflags) {

src/main/javassist/bytecode/ConstPool.java

@@ -108,6 +108,16 @@ public final class ConstPool {
      */
     public static final int CONST_InvokeDynamic = InvokeDynamicInfo.tag;
 
+    /**
+     * <code>CONSTANT_Module</code>
+     */
+    public static final int CONST_Module = ModuleInfo.tag;
+
+    /**
+     * <code>CONSTANT_Package</code>
+     */
+    public static final int CONST_Package = PackageInfo.tag;
+
     /**
      * Represents the class using this constant pool table.
      */
@@ -737,6 +747,31 @@ public final class ConstPool {
         }
     }
 
+    /**
+     * Reads the <code>name_index</code> field of the
+     * <code>CONSTANT_Module_info</code> structure at the given index.
+     *
+     * @return the module name at <code>name_index</code>.
+     * @since 3.22
+     */
+    public String getModuleInfo(int index) {
+        ModuleInfo mi = (ModuleInfo)getItem(index);
+        return getUtf8Info(mi.name);
+    }
+
+    /**
+     * Reads the <code>name_index</code> field of the
+     * <code>CONSTANT_Package_info</code> structure at the given index.
+     *
+     * @return the package name at <code>name_index</code>.  It is a slash-separated name
+     * such as com/oracle/net.
+     * @since 3.22
+     */
+    public String getPackageInfo(int index) {
+        PackageInfo mi = (PackageInfo)getItem(index);
+        return getUtf8Info(mi.name);
+    }
+
     /**
      * Determines whether <code>CONSTANT_Methodref_info</code>
      * structure at the given index represents the constructor
@@ -1117,6 +1152,26 @@ public final class ConstPool {
         return addItem(new InvokeDynamicInfo(bootstrap, nameAndType, numOfItems));
     }
 
+    /**
+     * Adds a new <code>CONSTANT_Module_info</code>
+     * @param nameIndex         the index of the Utf8 entry.
+     * @return          the index of the added entry.
+     * @since 3.22
+     */
+    public int addModuleInfo(int nameIndex) {
+        return addItem(new ModuleInfo(nameIndex, numOfItems));
+    }
+
+    /**
+     * Adds a new <code>CONSTANT_Package_info</code>
+     * @param nameIndex         the index of the Utf8 entry.
+     * @return          the index of the added entry.
+     * @since 3.22
+     */
+    public int addPackageInfo(int nameIndex) {
+        return addItem(new PackageInfo(nameIndex, numOfItems));
+    }
+
     /**
      * Get all the class names.
      *
@@ -1240,6 +1295,12 @@ public final class ConstPool {
         case InvokeDynamicInfo.tag :            // 18
             info = new InvokeDynamicInfo(in, numOfItems);
             break;
+        case ModuleInfo.tag :                   // 19
+            info = new ModuleInfo(in, numOfItems);
+            break;
+        case PackageInfo.tag :                  // 20
+            info = new PackageInfo(in, numOfItems);
+            break;
         default :
             throw new IOException("invalid constant type: " + tag + " at " + numOfItems);
         }
@@ -1996,3 +2057,89 @@ class InvokeDynamicInfo extends ConstInfo {
         out.println(nameAndType);
     }
 }
+
+class ModuleInfo extends ConstInfo {
+    static final int tag = 19;
+    int name;
+
+    public ModuleInfo(int moduleName, int index) {
+        super(index);
+        name = moduleName;
+    }
+
+    public ModuleInfo(DataInputStream in, int index) throws IOException {
+        super(index);
+        name = in.readUnsignedShort();
+    }
+
+    public int hashCode() { return name; }
+
+    public boolean equals(Object obj) {
+        return obj instanceof ModuleInfo && ((ModuleInfo)obj).name == name;
+    }
+
+    public int getTag() { return tag; }
+
+    public String getModuleName(ConstPool cp) {
+        return cp.getUtf8Info(name);
+    }
+
+    public int copy(ConstPool src, ConstPool dest, Map map) {
+        String moduleName = src.getUtf8Info(name);
+        int newName = dest.addUtf8Info(moduleName);
+        return dest.addModuleInfo(newName);
+    }
+
+    public void write(DataOutputStream out) throws IOException {
+        out.writeByte(tag);
+        out.writeShort(name);
+    }
+
+    public void print(PrintWriter out) {
+        out.print("Module #");
+        out.println(name);
+    }
+}
+
+class PackageInfo extends ConstInfo {
+    static final int tag = 20;
+    int name;
+
+    public PackageInfo(int moduleName, int index) {
+        super(index);
+        name = moduleName;
+    }
+
+    public PackageInfo(DataInputStream in, int index) throws IOException {
+        super(index);
+        name = in.readUnsignedShort();
+    }
+
+    public int hashCode() { return name; }
+
+    public boolean equals(Object obj) {
+        return obj instanceof PackageInfo && ((PackageInfo)obj).name == name;
+    }
+
+    public int getTag() { return tag; }
+
+    public String getPackageName(ConstPool cp) {
+        return cp.getUtf8Info(name);
+    }
+
+    public int copy(ConstPool src, ConstPool dest, Map map) {
+        String packageName = src.getUtf8Info(name);
+        int newName = dest.addUtf8Info(packageName);
+        return dest.addModuleInfo(newName);
+    }
+
+    public void write(DataOutputStream out) throws IOException {
+        out.writeByte(tag);
+        out.writeShort(name);
+    }
+
+    public void print(PrintWriter out) {
+        out.print("Package #");
+        out.println(name);
+    }
+}