Home | History | Annotate | Download | only in attrs 
      1 /**
      2  * ASM: a very small and fast Java bytecode manipulation framework
      3  * Copyright (c) 2000-2005 INRIA, France Telecom
      4  * All rights reserved.
      5  *
      6  * Redistribution and use in source and binary forms, with or without
      7  * modification, are permitted provided that the following conditions
      8  * are met:
      9  * 1. Redistributions of source code must retain the above copyright
     10  *    notice, this list of conditions and the following disclaimer.
     11  * 2. Redistributions in binary form must reproduce the above copyright
     12  *    notice, this list of conditions and the following disclaimer in the
     13  *    documentation and/or other materials provided with the distribution.
     14  * 3. Neither the name of the copyright holders nor the names of its
     15  *    contributors may be used to endorse or promote products derived from
     16  *    this software without specific prior written permission.
     17  *
     18  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
     19  * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
     20  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
     21  * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
     22  * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
     23  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
     24  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
     25  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
     26  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
     27  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
     28  * THE POSSIBILITY OF SUCH DAMAGE.
     29  */
     30 package org.objectweb.asm.attrs;
     31 
     32 import java.util.List;
     33 
     34 import org.objectweb.asm.Label;
     35 
     36 /**
     37  * Holds the state of the stack and local variables for a single execution
     38  * branch.
     39  *
     40  * <i>Note that Long and Double types are represented by two entries in locals
     41  * and stack. Second entry should be always of type Top.</i>
     42  *
     43  * @see <a href="http://www.jcp.org/en/jsr/detail?id=139">JSR 139 : Connected
     44  *      Limited Device Configuration 1.1</a>
     45  *
     46  * @see "ClassFileFormat-Java6.fm Page 138 Friday, April 15, 2005 3:22 PM"
     47  *
     48  * @author Eugene Kuleshov
     49  */
     50 public class StackMapFrame {
     51 
     52     /**
     53      * A <code>Label</code> for frame offset within method bytecode.
     54      */
     55     public Label label;
     56 
     57     /**
     58      * A List of <code>StackMapType</code> instances that represent locals for
     59      * this frame.
     60      */
     61     public List locals;
     62 
     63     /**
     64      * A List of <code>StackMapType</code> instances that represent stack for
     65      * this frame.
     66      */
     67     public List stack;
     68 
     69     public StackMapFrame(Label label, List locals, List stack) {
     70         this.label = label;
     71         this.locals = locals;
     72         this.stack = stack;
     73     }
     74 
     75     public String toString() {
     76         StringBuffer sb = new StringBuffer("Frame:L");
     77         sb.append(System.identityHashCode(label));
     78         sb.append(" locals").append(locals);
     79         sb.append(" stack").append(stack);
     80         return sb.toString();
     81     }
     82 }
     83