ASM

2026-07-03 16:49:10 +00:00 · 2014-02-20 01:19:41 +01:00
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+<html>
+<!--
+ * ASM: a very small and fast Java bytecode manipulation framework
+ * Copyright (c) 2000-2011 INRIA, France Telecom
+ * 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. Neither the name of the copyright holders 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.
+-->
+<body>
+Provides some useful class and method adapters. <i>The preferred way of using
+these adapters is by chaining them together and to custom adapters (instead of
+inheriting from them)</i>. Indeed this approach provides more combination
+possibilities than inheritance. For instance, suppose you want to implement an
+adapter MyAdapter than needs sorted local variables and intermediate stack map
+frame values taking into account the local variables sort. By using inheritance,
+this would require MyAdapter to extend AnalyzerAdapter, itself extending
+LocalVariablesSorter. But AnalyzerAdapter is not a subclass of
+LocalVariablesSorter, so this is not possible. On the contrary, by using
+delegation, you can make LocalVariablesSorter delegate to AnalyzerAdapter,
+itself delegating to MyAdapter. In this case AnalyzerAdapter computes
+intermediate frames based on the output of LocalVariablesSorter, and MyAdapter
+can add new locals by calling the newLocal method on LocalVariablesSorter, and
+can get the stack map frame state before each instruction by reading the locals
+and stack fields in AnalyzerAdapter (this requires references from MyAdapter
+back to LocalVariablesSorter and AnalyzerAdapter).
+</body>