Package org.eclipse.persistence.internal.libraries.asm.util.attrs

Source Code of org.eclipse.persistence.internal.libraries.asm.util.attrs.ASMLocalVariableTypeTableAttribute

/**
* ASM: a very small and fast Java bytecode manipulation framework
* Copyright (c) 2000,2002,2003 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.
*/

package org.eclipse.persistence.internal.libraries.asm.util.attrs;

import java.util.Map;

import org.eclipse.persistence.internal.libraries.asm.Attribute;
import org.eclipse.persistence.internal.libraries.asm.ClassReader;
import org.eclipse.persistence.internal.libraries.asm.Label;
import org.eclipse.persistence.internal.libraries.asm.attrs.LocalVariableType;
import org.eclipse.persistence.internal.libraries.asm.attrs.LocalVariableTypeTableAttribute;

/**
* An {@link ASMifiable} {@link LocalVariableTypeTableAttribute} sub class.
*
* @author Eugene Kuleshov
*/

public class ASMLocalVariableTypeTableAttribute
  extends LocalVariableTypeTableAttribute
  implements ASMifiable
{

  protected Attribute read( ClassReader cr, int off, int len, char[] buf, int codeOff, Label[] labels) {
    LocalVariableTypeTableAttribute attr = ( LocalVariableTypeTableAttribute) super.read(cr, off, len, buf, codeOff, labels);

    ASMLocalVariableTypeTableAttribute res = new ASMLocalVariableTypeTableAttribute();
    res.getTypes().addAll( attr.getTypes());
    return res;
  }

  public void asmify( StringBuffer buf, String varName, Map labelNames) {
    buf.append("LocalVariableTypeTableAttribute ").append(varName)
      .append(" = new LocalVariableTypeTableAttribute();\n");

    buf.append("{\n");
    buf.append("LocalVariableTypeTableAttribute ").append(varName).append("Attr");
    buf.append(" = new LocalVariableTypeTableAttribute();\n");
    if (types.size() > 0) {
      for (int i = 0; i < types.size(); i++) {
        asmify((LocalVariableType)types.get(i), buf, varName + "type" + i, labelNames);
      }
    }
    buf.append(varName).append(".visitAttribute(").append(varName);
    buf.append("Attr);\n}\n");
  }

  private void asmify( LocalVariableType type, StringBuffer buf, String varName, Map labelNames) {
    declareLabel(buf, labelNames, type.start);
    declareLabel(buf, labelNames, type.end);
    buf.append("{\n");
   
    buf.append("LocalVariableType ").append(varName).append( " = new LocalVariableType();\n");
   
    buf.append(varName).append(".start = ").append( labelNames.get( type.start)).append(";\n");
    buf.append(varName).append(".end = ").append( labelNames.get( type.end)).append(";\n");
    buf.append(varName).append(".name = \"").append( type.name).append( "\";\n");
    buf.append(varName).append(".signature = ").append( type.signature).append( "\";\n");
    buf.append(varName).append(".index = ").append( type.index).append( "\";\n");
   
    buf.append( "cvAttr.types.add(").append(varName).append(");\n");
    buf.append("}\n");
  }

  static void declareLabel (StringBuffer buf, Map labelNames, Label l) {
    String name = (String)labelNames.get(l);
    if (name == null) {
      name = "l" + labelNames.size();
      labelNames.put(l, name);
      buf.append("Label ").append(name).append(" = new Label();\n");
    }
  }
 
}

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