1 files changed, 142 insertions, 0 deletions
diff --git a/src/proguard/classfile/attribute/Attribute.java b/src/proguard/classfile/attribute/Attribute.java
new file mode 100644
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+++ b/src/proguard/classfile/attribute/Attribute.java
@@ -0,0 +1,142 @@
+/*
+ * ProGuard -- shrinking, optimization, obfuscation, and preverification
+ *             of Java bytecode.
+ *
+ * Copyright (c) 2002-2009 Eric Lafortune (eric@graphics.cornell.edu)
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License as published by the Free
+ * Software Foundation; either version 2 of the License, or (at your option)
+ * any later version.
+ *
+ * This program is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
+ * more details.
+ *
+ * You should have received a copy of the GNU General Public License along
+ * with this program; if not, write to the Free Software Foundation, Inc.,
+ * 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+ */
+package proguard.classfile.attribute;
+
+import proguard.classfile.*;
+import proguard.classfile.attribute.visitor.AttributeVisitor;
+
+/**
+ * This abstract class represents an attribute that is attached to a class,
+ * a class member, or a code attribute. Specific types of attributes are
+ * subclassed from it.
+ *
+ * @author Eric Lafortune
+ * @noinspection AbstractClassWithoutAbstractMethods
+ */
+public abstract class Attribute implements VisitorAccepter
+{
+    public int u2attributeNameIndex;
+    //public int  u4attributeLength;
+    //public byte info[];
+
+    /**
+     * An extra field in which visitors can store information.
+     */
+    public Object visitorInfo;
+
+
+    /**
+     * Create an uninitialized Attribute.
+     */
+    protected Attribute()
+    {
+    }
+
+
+    /**
+     * Create an initialized Attribute.
+     */
+    protected Attribute(int u2attributeNameIndex)
+    {
+        this.u2attributeNameIndex = u2attributeNameIndex;
+    }
+
+
+    /**
+     * Returns the String name of the attribute.
+     */
+    public String getAttributeName(Clazz clazz)
+    {
+        return clazz.getString(u2attributeNameIndex);
+    }
+
+
+    // Methods to be implemented by extensions, if applicable.
+
+    /**
+     * Accepts the given visitor.
+     */
+    public void accept(Clazz clazz, AttributeVisitor attributeVisitor)
+    {
+        throw new UnsupportedOperationException("Method must be overridden in ["+this.getClass().getName()+"] if ever called");
+    }
+
+    /**
+     * Accepts the given visitor in the context of the given field.
+     */
+    public void accept(Clazz clazz, Field field, AttributeVisitor attributeVisitor)
+    {
+        // Delegate the default invocation if the field is null anyway.
+        if (field == null)
+        {
+            accept(clazz, attributeVisitor);
+        }
+        else
+        {
+            throw new UnsupportedOperationException("Method must be overridden in ["+this.getClass().getName()+"] if ever called");
+        }
+    }
+
+    /**
+     * Accepts the given visitor in the context of the given method.
+     */
+    public void accept(Clazz clazz, Method method, AttributeVisitor attributeVisitor)
+    {
+        // Delegate the default invocation if the method is null anyway.
+        if (method == null)
+        {
+            accept(clazz, (Field)null, attributeVisitor);
+        }
+        else
+        {
+            throw new UnsupportedOperationException("Method must be overridden in ["+this.getClass().getName()+"] if ever called");
+        }
+    }
+
+    /**
+     * Accepts the given visitor in the context of the given code attribute.
+     */
+    public void accept(Clazz clazz, Method method, CodeAttribute codeAttribute, AttributeVisitor attributeVisitor)
+    {
+        // Delegate the default invocation if the code attribute is null anyway.
+        if (codeAttribute == null)
+        {
+            accept(clazz, method, attributeVisitor);
+        }
+        else
+        {
+            throw new UnsupportedOperationException("Method must be overridden in ["+this.getClass().getName()+"] if ever called");
+        }
+    }
+
+
+    // Implementations for VisitorAccepter.
+
+    public Object getVisitorInfo()
+    {
+        return visitorInfo;
+    }
+
+    public void setVisitorInfo(Object visitorInfo)
+    {
+        this.visitorInfo = visitorInfo;
+    }
+}