/**
* 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 oracle.toplink.libraries.asm.attrs;
import java.util.ArrayList;
import java.util.List;
import oracle.toplink.libraries.asm.Attribute;
import oracle.toplink.libraries.asm.ByteVector;
import oracle.toplink.libraries.asm.ClassReader;
import oracle.toplink.libraries.asm.ClassWriter;
import oracle.toplink.libraries.asm.Label;
/**
* The RuntimeVisibleParameterAnnotations attribute is a variable length attribute
* in the attributes table of the method_info structure. The
* RuntimeVisibleParameterAnnotations attribute records runtime-visible Java
* programming language annotations on the parameters of the corresponding method.
* Each method_info structure may contain at most one
* RuntimeVisibleParameterAnnotations attribute, which records all the
* runtime-visible Java programming language annotations on the parameters of the
* corresponding method. The JVM must make these annotations available so they can
* be returned by the appropriate reflective APIs.
* <p>
* The RuntimeVisibleParameterAnnotations attribute has the following format:
* <pre>
* RuntimeVisibleParameterAnnotations_attribute {
* u2 attribute_name_index;
* u4 attribute_length;
* u1 num_parameters;
* {
* u2 num_annotations;
* annotation annotations[num_annotations];
* } parameter_annotations[num_parameters];
* }
* <pre>
* The items of the RuntimeVisibleParameterAnnotations structure are as follows:
* <dl>
* <dt>attribute_name_index</dt>
* <dd>The value of the attribute_name_index item must be a valid index into the
* constant_pool table. The constant_pool entry at that index must be a
* CONSTANT_Utf8_info structure representing the string
* "RuntimeVisibleParameterAnnotations".</dd>
* <dt>attribute_length</dt>
* <dd>The value of the attribute_length item indicates the length of the attribute,
* excluding the initial six bytes. The value of the attribute_length item is
* thus dependent on the number of parameters, the number of runtime-visible
* annotations on each parameter, and their values.</dd>
* <dt>num_parameters</dt>
* <dd>The value of the num_parameters item gives the number of parameters of the
* method represented by the method_info structure on which the annotation
* occurs. (This duplicates information that could be extracted from the method
* descriptor.)</dd>
* <dt>parameter_annotations</dt>
* <dd>Each value of the parameter_annotations table represents all of the
* runtime-visible annotations on a single parameter. The sequence of values in
* the table corresponds to the sequence of parameters in the method signature.
* Each parameter_annotations entry contains the following two items:</dd>
* <dl>
* <dt>num_annotations</dt>
* <dd>The value of the num_annotations item indicates the number of runtime-visible
* annotations on the parameter corresponding to the sequence number of this
* parameter_annotations element.</dd>
* <dt>annotations</dt>
* <dd>Each value of the annotations table represents a single runtime-visible
* {@link oracle.toplink.libraries.asm.attrs.Annotation annotation} on the parameter
* corresponding to the sequence number of this parameter_annotations element.</dd>
* </dl>
* </dd>
* </dl>
*
* @see <a href="http://www.jcp.org/en/jsr/detail?id=175">JSR 175 : A Metadata
* Facility for the Java Programming Language</a>
*
* @author Eugene Kuleshov
*/
public class RuntimeVisibleParameterAnnotations extends Attribute {
/**
* <code>List</code> of <code>List</code>s that
* contains <code>Annotation</code> for each method parameter.
*
* @associates <{oracle.toplink.libraries.asm.attrs.Annotation}>
* @label parameters
* @associationAsClass List
*/
public List parameters = new ArrayList();
public RuntimeVisibleParameterAnnotations () {
super("RuntimeVisibleParameterAnnotations");
}
protected Attribute read (ClassReader cr, int off,
int len, char[] buf, int codeOff, Label[] labels) {
RuntimeVisibleParameterAnnotations atr =
new RuntimeVisibleParameterAnnotations();
Annotation.readParameterAnnotations(atr.parameters, cr, off, buf);
return atr;
}
protected ByteVector write (ClassWriter cw, byte[] code,
int len, int maxStack, int maxLocals) {
return Annotation.writeParametersAnnotations(
new ByteVector(), parameters, cw);
}
public String toString () {
return Annotation.stringParameterAnnotations(parameters);
}
}