1 files changed, 82 insertions, 0 deletions
diff --git a/src/main/javassist/convert/TransformWriteField.java b/src/main/javassist/convert/TransformWriteField.java
new file mode 100644
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+++ b/src/main/javassist/convert/TransformWriteField.java
@@ -0,0 +1,82 @@
+/*
+ * This file is part of the Javassist toolkit.
+ *
+ * The contents of this file are subject to the Mozilla Public License
+ * Version 1.1 (the "License"); you may not use this file except in
+ * compliance with the License.  You may obtain a copy of the License at
+ * either http://www.mozilla.org/MPL/.
+ *
+ * Software distributed under the License is distributed on an "AS IS"
+ * basis, WITHOUT WARRANTY OF ANY KIND, either express or implied.  See
+ * the License for the specific language governing rights and limitations
+ * under the License.
+ *
+ * The Original Code is Javassist.
+ *
+ * The Initial Developer of the Original Code is Shigeru Chiba.  Portions
+ * created by Shigeru Chiba are Copyright (C) 1999-2003 Shigeru Chiba.
+ * All Rights Reserved.
+ *
+ * Contributor(s):
+ *
+ * The development of this software is supported in part by the PRESTO
+ * program (Sakigake Kenkyu 21) of Japan Science and Technology Corporation.
+ */
+
+package javassist.convert;
+
+import javassist.CtClass;
+import javassist.CtField;
+import javassist.bytecode.*;
+import javassist.CannotCompileException;
+
+final public class TransformWriteField extends TransformReadField {
+    public TransformWriteField(Transformer next, CtField field,
+			       String methodClassname, String methodName)
+    {
+	super(next, field, methodClassname, methodName);
+    }
+
+    public int transform(CtClass tclazz, int pos, CodeIterator iterator,
+			 ConstPool cp) throws BadBytecode
+    {
+	int c = iterator.byteAt(pos);
+	if (c == PUTFIELD || c == PUTSTATIC) {
+	    int index = iterator.u16bitAt(pos + 1);
+	    String typedesc = isField(tclazz.getClassPool(), cp,
+				fieldClass, fieldname, isPrivate, index);
+	    if (typedesc != null) {
+		if (c == PUTSTATIC) {
+		    CodeAttribute ca = iterator.get();
+		    iterator.move(pos);
+		    char c0 = typedesc.charAt(0);
+		    if (c0 == 'J' || c0 == 'D') {	// long or double
+			// insertGap() may insert 4 bytes.
+			iterator.insertGap(3);
+			iterator.writeByte(ACONST_NULL, pos);
+			iterator.writeByte(DUP_X2, pos + 1);
+			iterator.writeByte(POP, pos + 2);
+			ca.setMaxStack(ca.getMaxStack() + 2);
+		    }
+		    else {
+			// insertGap() may insert 4 bytes.
+			iterator.insertGap(2);
+			iterator.writeByte(ACONST_NULL, pos);
+			iterator.writeByte(SWAP, pos + 1);
+			ca.setMaxStack(ca.getMaxStack() + 1);
+		    }
+
+		    pos = iterator.next();
+		}
+
+		int mi = cp.addClassInfo(methodClassname);
+		String type = "(Ljava/lang/Object;" + typedesc + ")V";
+		int methodref = cp.addMethodrefInfo(mi, methodName, type);
+		iterator.writeByte(INVOKESTATIC, pos);
+		iterator.write16bit(methodref, pos + 1);
+	    }
+	}
+
+	return pos;
+    }
+}