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diff --git a/api/src/main/java/org/osjava/jardiff/AbstractInfo.java b/api/src/main/java/org/osjava/jardiff/AbstractInfo.java
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+/*
+ * org.osjava.jardiff.AbstractInfo
+ *
+ * $Id: IOThread.java 1952 2005-08-28 18:03:41Z cybertiger $
+ * $URL: https://svn.osjava.org/svn/osjava/trunk/osjava-nio/src/java/org/osjava/nio/IOThread.java $
+ * $Rev: 1952 $
+ * $Date: 2005-08-28 18:03:41 +0000 (Sun, 28 Aug 2005) $
+ * $Author: cybertiger $
+ *
+ * Copyright (c) 2005, Antony Riley
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are met:
+ *
+ * + Redistributions of source code must retain the above copyright notice,
+ *   this list of conditions and the following disclaimer.
+ *
+ * + Redistributions in binary form must reproduce the above copyright notice,
+ *   this list of conditions and the following disclaimer in the documentation
+ *   and/or other materials provided with the distribution.
+ *
+ * + Neither the name JarDiff nor the names of its contributors may
+ *   be used to endorse or promote products derived from this software without
+ *   specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED.  IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
+ * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGE.
+ */
+package org.osjava.jardiff;
+
+import org.objectweb.asm.Opcodes;
+
+/**
+ * An abstract class representing information about a class, method or field.
+ *
+ * @author <a href="mailto:[email protected]">Antony Riley</a>
+ */
+public abstract class AbstractInfo
+{
+    /**
+     * The string used to represent a class, method or field with public 
+     * access.
+     */
+    public final String ACCESS_PUBLIC = "public";
+    
+    /**
+     * The string used to represent a class, method or field with protected 
+     * access.
+     */
+    public final String ACCESS_PROTECTED = "protected";
+
+    /**
+     * The string used to represent a class, method or field with package
+     * private access.
+     * Package private access is the default access level used by java when
+     * you do not specify one of public, protected or private.
+     */
+    public final String ACCESS_PACKAGE = "package";
+
+    /**
+     * The string used to represent a class, method or field with private
+     * access.
+     */
+    public final String ACCESS_PRIVATE = "private";
+
+    /**
+     * The access flags for this class, method or field.
+     */
+    private final int access;
+    
+    /**
+     * The internal name of this class, method or field.
+     */
+    private final String name;
+    
+    /**
+     * Construct a new AbstractInfo with the specified access and name.
+     *
+     * @param access The access flags for this class, method or field.
+     * @param name The internal name of this class, method or field.
+     */
+    public AbstractInfo(int access, String name) {
+        this.access = access;
+        this.name = name;
+    }
+    
+    /**
+     * Get the access flags for this class, method or field.
+     *
+     * @return the access flags.
+     */
+    public final int getAccess() {
+        return access;
+    }
+    
+    /**
+     * Get the internal name of this class, method or field.
+     *
+     * @return the name
+     */
+    public final String getName() {
+        return name;
+    }
+    
+    /**
+     * Test if this class, method or field is public.
+     *
+     * @return true if it is public.
+     */
+    public final boolean isPublic() {
+        return (access & Opcodes.ACC_PUBLIC) != 0;
+    }
+    
+    /**
+     * Test if this class, method or field is protected.
+     *
+     * @return true if it is protected.
+     */
+    public final boolean isProtected() {
+        return (access & Opcodes.ACC_PROTECTED) != 0;
+    }
+    
+    /**
+     * Test if this class, method or field is package private.
+     *
+     * @return true if it is package private.
+     */
+    public final boolean isPackagePrivate() {
+        return (access & (Opcodes.ACC_PUBLIC | Opcodes.ACC_PROTECTED | 
+                    Opcodes.ACC_PRIVATE)) == 0;
+    }
+    
+    /**
+     * Test if this class, method or field is private.
+     *
+     * @return true if it is private.
+     */
+    public final boolean isPrivate() {
+        return (access & Opcodes.ACC_PRIVATE) != 0;
+    }
+    
+    /**
+     * Test if this class, method or field is abstract.
+     *
+     * @return true if it is abstract.
+     */
+    public final boolean isAbstract() {
+        return (access & Opcodes.ACC_ABSTRACT) != 0;
+    }
+    
+    /**
+     * Test if this class, method or field is annotation
+     *
+     * @return true if it is annotation.
+     */
+    public final boolean isAnnotation() {
+        return (access & Opcodes.ACC_ANNOTATION) != 0;
+    }
+    
+    /**
+     * Test if this class, method or field is a bridge
+     *
+     * @return true if it is a bridge.
+     */
+    public final boolean isBridge() {
+        return (access & Opcodes.ACC_BRIDGE) != 0;
+    }
+    
+    /**
+     * Test if this class, method or field is deprecated.
+     *
+     * @return true if it is deprecated.
+     */
+    public final boolean isDeprecated() {
+        return (access & Opcodes.ACC_DEPRECATED) != 0;
+    }
+    
+    /**
+     * Test if this class, method or field is an enum.
+     *
+     * @return true if it is an enum.
+     */
+    public final boolean isEnum() {
+        return (access & Opcodes.ACC_ENUM) != 0;
+    }
+    
+    /**
+     * Test if this class, method or field is final.
+     *
+     * @return true if it is final.
+     */
+    public final boolean isFinal() {
+        return (access & Opcodes.ACC_FINAL) != 0;
+    }
+    
+    /**
+     * Test if this class, method or field is an interface.
+     *
+     * @return true if it is an interface.
+     */
+    public final boolean isInterface() {
+        return (access & Opcodes.ACC_INTERFACE) != 0;
+    }
+    
+    /**
+     * Test if this class, method or field is native.
+     *
+     * @return true if it is native.
+     */
+    public final boolean isNative() {
+        return (access & Opcodes.ACC_NATIVE) != 0;
+    }
+    
+    /**
+     * Test if this class, method or field is static.
+     *
+     * @return true if it is static.
+     */
+    public final boolean isStatic() {
+        return (access & Opcodes.ACC_STATIC) != 0;
+    }
+    
+    /**
+     * Test if this class, method or field is string.
+     *
+     * @return true if it is strict.
+     */
+    public final boolean isStrict() {
+        return (access & Opcodes.ACC_STRICT) != 0;
+    }
+    
+    /**
+     * Test if this class, method or field is super.
+     *
+     * @return true if it is super.
+     */
+    public final boolean isSuper() {
+        return (access & Opcodes.ACC_SUPER) != 0;
+    }
+    
+    /**
+     * Test if this class, method or field is synchronized.
+     *
+     * @return true if it is synchronized
+     */
+    public final boolean isSynchronized() {
+        return (access & Opcodes.ACC_SYNCHRONIZED) != 0;
+    }
+    
+    /**
+     * Test if this class, method or field is synthetic.
+     *
+     * @return true if it is synchronized.
+     */
+    public final boolean isSynthetic() {
+        return (access & Opcodes.ACC_SYNTHETIC) != 0;
+    }
+    
+    /**
+     * Test if this class or field is transient.
+     * If this flag is set on a method it means something different.
+     *
+     * @return true if it is transient.
+     */
+    public final boolean isTransient() {
+        return !(this instanceof MethodInfo) &&
+            ((access & Opcodes.ACC_TRANSIENT) != 0);
+    }
+    
+    /**
+     * Test if this method is varargs.
+     * If this flag is set on a class or field it means something different.
+     * Well, it probably shouldn't be set on a class as it would make
+     * no sense, it only really makes sense on fields and methods.
+     *
+     * @return true if it is vargargs.
+     */
+    public final boolean isVarargs() {
+        return (this instanceof MethodInfo) && 
+            ((access & Opcodes.ACC_VARARGS) != 0);
+    }
+    
+    /**
+     * Test if this class, method or field is volatile.
+     * 
+     * @return true if it is volatile.
+     */
+    public final boolean isVolatile() {
+        return (access & Opcodes.ACC_VOLATILE) != 0;
+    }
+    
+    /**
+     * Retrivie the access level for this class, method or field.
+     *
+     * @return the access level
+     */
+    public final String getAccessType() {
+        if (isPublic())
+            return ACCESS_PUBLIC;
+        if (isProtected())
+            return ACCESS_PROTECTED;
+        if (isPrivate())
+            return ACCESS_PRIVATE;
+        return ACCESS_PACKAGE;
+    }
+}