1 files changed, 103 insertions, 0 deletions
diff --git a/src/proguard/classfile/attribute/preverification/VerificationType.java b/src/proguard/classfile/attribute/preverification/VerificationType.java
new file mode 100644
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--- /dev/null
+++ b/src/proguard/classfile/attribute/preverification/VerificationType.java
@@ -0,0 +1,103 @@
+/*
+ * 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.preverification;
+
+import proguard.classfile.*;
+import proguard.classfile.attribute.CodeAttribute;
+import proguard.classfile.attribute.preverification.visitor.VerificationTypeVisitor;
+
+/**
+ * This abstract class represents a verification type of a local variable or
+ * a stack element. Specific verification types are subclassed from it.
+ *
+ * @author Eric Lafortune
+ */
+public abstract class VerificationType implements VisitorAccepter
+{
+    public static final int TOP_TYPE                = 0;
+    public static final int INTEGER_TYPE            = 1;
+    public static final int FLOAT_TYPE              = 2;
+    public static final int DOUBLE_TYPE             = 3;
+    public static final int LONG_TYPE               = 4;
+    public static final int NULL_TYPE               = 5;
+    public static final int UNINITIALIZED_THIS_TYPE = 6;
+    public static final int OBJECT_TYPE             = 7;
+    public static final int UNINITIALIZED_TYPE      = 8;
+
+
+    /**
+     * An extra field in which visitors can store information.
+     */
+    public Object visitorInfo;
+
+
+    /**
+     * Returns the tag of the verification type.
+     */
+    public abstract int getTag();
+
+
+    /**
+     * Accepts the given visitor in the context of a method's code, either on
+     * a stack or as a variable.
+     */
+    public abstract void accept(Clazz clazz, Method method, CodeAttribute codeAttribute, int instructionOffset, VerificationTypeVisitor verificationTypeVisitor);
+
+
+    /**
+     * Accepts the given visitor in the context of a stack in a method's code .
+     */
+    public abstract void stackAccept(Clazz clazz, Method method, CodeAttribute codeAttribute, int instructionOffset, int stackIndex, VerificationTypeVisitor verificationTypeVisitor);
+
+
+    /**
+     * Accepts the given visitor in the context of a variable in a method's code.
+     */
+    public abstract void variablesAccept(Clazz clazz, Method method, CodeAttribute codeAttribute, int instructionOffset, int variableIndex, VerificationTypeVisitor verificationTypeVisitor);
+
+
+    // Implementations for VisitorAccepter.
+
+    public Object getVisitorInfo()
+    {
+        return visitorInfo;
+    }
+
+    public void setVisitorInfo(Object visitorInfo)
+    {
+        this.visitorInfo = visitorInfo;
+    }
+
+
+    // Implementations for Object.
+
+    public boolean equals(Object object)
+    {
+        return object != null &&
+               this.getClass() == object.getClass();
+    }
+
+
+    public int hashCode()
+    {
+        return this.getClass().hashCode();
+    }
+}