diff src/com/go/trove/classfile/ConstantClassInfo.java @ 0:3dc0c5604566

Initial checkin of blitz 2.0 fcs - no installer yet.
author Dan Creswell <dan.creswell@gmail.com>
date Sat, 21 Mar 2009 11:00:06 +0000
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--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/src/com/go/trove/classfile/ConstantClassInfo.java	Sat Mar 21 11:00:06 2009 +0000
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+/* ====================================================================
+ * Trove - Copyright (c) 1997-2000 Walt Disney Internet Group
+ * ====================================================================
+ * The Tea Software License, Version 1.1
+ *
+ * Copyright (c) 2000 Walt Disney Internet Group. All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ *
+ * 2. 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.
+ *
+ * 3. The end-user documentation included with the redistribution,
+ *    if any, must include the following acknowledgment:
+ *       "This product includes software developed by the
+ *        Walt Disney Internet Group (http://opensource.go.com/)."
+ *    Alternately, this acknowledgment may appear in the software itself,
+ *    if and wherever such third-party acknowledgments normally appear.
+ *
+ * 4. The names "Tea", "TeaServlet", "Kettle", "Trove" and "BeanDoc" must
+ *    not be used to endorse or promote products derived from this
+ *    software without prior written permission. For written
+ *    permission, please contact opensource@dig.com.
+ *
+ * 5. Products derived from this software may not be called "Tea",
+ *    "TeaServlet", "Kettle" or "Trove", nor may "Tea", "TeaServlet",
+ *    "Kettle", "Trove" or "BeanDoc" appear in their name, without prior
+ *    written permission of the Walt Disney Internet Group.
+ *
+ * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED 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 WALT DISNEY INTERNET GROUP OR ITS
+ * 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.
+ * ====================================================================
+ *
+ * For more information about Tea, please see http://opensource.go.com/.
+ */
+
+package com.go.trove.classfile;
+
+import java.io.*;
+
+/******************************************************************************
+ * This class corresponds to the CONSTANT_Class_info structure as defined in
+ * section 4.4.1 of <i>The Java Virtual Machine Specification</i>.
+ * 
+ * @author Brian S O'Neill
+ * @version
+ * <!--$$Revision: 1.1 $-->, <!--$$JustDate:--> 01/05/14 <!-- $-->
+ */
+public class ConstantClassInfo extends ConstantInfo {
+    private String mClassName;
+    private int mDim;
+    private TypeDescriptor mType;
+    
+    private ConstantUTFInfo mNameConstant;
+    
+    /** 
+     * Will return either a new ConstantClassInfo object or one already in
+     * the constant pool. If it is a new ConstantClassInfo, it will be inserted
+     * into the pool.
+     */
+    static ConstantClassInfo make(ConstantPool cp, String className) {
+        ConstantInfo ci = new ConstantClassInfo(cp, className);
+        return (ConstantClassInfo)cp.addConstant(ci);
+    }
+    
+    /** Used to describe an array class. */
+    static ConstantClassInfo make(ConstantPool cp, 
+                                  String className, int dim) {
+        ConstantInfo ci = new ConstantClassInfo(cp, className, dim);
+        return (ConstantClassInfo)cp.addConstant(ci);
+    }
+    
+    static ConstantClassInfo make(ConstantPool cp,
+                                  TypeDescriptor type) {
+        ConstantInfo ci = new ConstantClassInfo(cp, type);
+        return (ConstantClassInfo)cp.addConstant(ci);
+    }
+
+    ConstantClassInfo(ConstantUTFInfo nameConstant) {
+        super(TAG_CLASS);
+        mNameConstant = nameConstant;
+        String name = nameConstant.getValue();
+        if (!name.endsWith(";") && !name.startsWith("[")) {
+            mClassName = name.replace('/', '.');
+            mDim = 0;
+        }
+        else {
+            TypeDescriptor desc = TypeDescriptor.parseTypeDesc(name);
+            mClassName = desc.getClassName();
+            mDim = desc.getDimensions();
+        }
+    }
+
+    private ConstantClassInfo(ConstantPool cp, String className) {
+        super(TAG_CLASS);
+        
+        mClassName = className;
+        mDim = 0;
+        
+        String desc = className.replace('.', '/');
+        mNameConstant = ConstantUTFInfo.make(cp, desc);
+    }
+    
+    /** Used to describe an array class. */
+    private ConstantClassInfo(ConstantPool cp, String className, int dim) {
+        super(TAG_CLASS);
+        
+        mClassName = className;
+        mDim = dim;
+        
+        String desc;
+        if (dim > 0) {
+            desc = TypeDescriptor.generate(className, dim);
+        }
+        else {
+            desc = className.replace('.', '/');
+        }
+
+        mNameConstant = ConstantUTFInfo.make(cp, desc);
+    }
+    
+    private ConstantClassInfo(ConstantPool cp, TypeDescriptor type) {
+        super(TAG_CLASS);
+
+        mClassName = type.getClassName();
+        mDim = type.getDimensions();
+        mType = type;
+
+        String desc;
+        if (mDim > 0) {
+            desc = type.toString();
+        }
+        else {
+            desc = type.getClassName().replace('.', '/');
+        }
+
+        mNameConstant = ConstantUTFInfo.make(cp, desc);
+    }
+
+    public String getClassName() {
+        return mClassName;
+    }
+
+    public int getDimensions() {
+        return mDim;
+    }
+
+    public TypeDescriptor getTypeDescriptor() {
+        if (mType == null) {
+            mType = new TypeDescriptor(getClassName());
+
+            int dim = getDimensions();
+            if (dim > 0) {
+                mType = new TypeDescriptor(mType, dim);
+            }
+        }
+
+        return mType;
+    }
+
+    public int hashCode() {
+        return mClassName.hashCode();
+    }
+    
+    public boolean equals(Object obj) {
+        if (obj instanceof ConstantClassInfo) {
+            ConstantClassInfo other = (ConstantClassInfo)obj;
+            return mClassName.equals(other.mClassName) && mDim == other.mDim;
+        }
+        
+        return false;
+    }
+    
+    public void writeTo(DataOutput dout) throws IOException {
+        super.writeTo(dout);
+        dout.writeShort(mNameConstant.getIndex());
+    }
+
+    public String toString() {
+        StringBuffer buf = new StringBuffer("CONSTANT_Class_info: ");
+        buf.append(getClassName());
+        for (int i = getDimensions(); i > 0; i--) {
+            buf.append('[');
+            buf.append(']');
+        }
+        return buf.toString();
+    }
+}