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/*
 * Javassist, a Java-bytecode translator toolkit.
 * Copyright (C) 1999- Shigeru Chiba. All Rights Reserved.
 *
 * 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.  Alternatively, the contents of this file may be used under
 * the terms of the GNU Lesser General Public License Version 2.1 or later,
 * or the Apache License Version 2.0.
 *
 * 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.
 */

package javassist.bytecode;

import java.util.HashMap;
import java.util.Map;
import java.io.IOException;
import java.io.DataInputStream;
import java.io.ByteArrayOutputStream;

import javassist.bytecode.AnnotationsAttribute.Copier;
import javassist.bytecode.AnnotationsAttribute.Parser;
import javassist.bytecode.AnnotationsAttribute.Renamer;
import javassist.bytecode.annotation.*;

/**
 * A class representing RuntimeVisibleAnnotations_attribute and
 * RuntimeInvisibleAnnotations_attribute.
 *
 * 

To obtain an ParameterAnnotationAttribute object, invoke * getAttribute(ParameterAnnotationsAttribute.invisibleTag) * in MethodInfo. * The obtained attribute is a * runtime invisible annotations attribute. * If the parameter is * ParameterAnnotationAttribute.visibleTag, then the obtained * attribute is a runtime visible one. */ public class ParameterAnnotationsAttribute extends AttributeInfo { /** * The name of the RuntimeVisibleParameterAnnotations * attribute. */ public static final String visibleTag = "RuntimeVisibleParameterAnnotations"; /** * The name of the RuntimeInvisibleParameterAnnotations * attribute. */ public static final String invisibleTag = "RuntimeInvisibleParameterAnnotations"; /** * Constructs * a Runtime(In)VisibleParameterAnnotations_attribute. * * @param cp constant pool * @param attrname attribute name (visibleTag or * invisibleTag). * @param info the contents of this attribute. It does not * include attribute_name_index or * attribute_length. */ public ParameterAnnotationsAttribute(ConstPool cp, String attrname, byte[] info) { super(cp, attrname, info); } /** * Constructs an empty * Runtime(In)VisibleParameterAnnotations_attribute. * A new annotation can be later added to the created attribute * by setAnnotations(). * * @param cp constant pool * @param attrname attribute name (visibleTag or * invisibleTag). * @see #setAnnotations(Annotation[][]) */ public ParameterAnnotationsAttribute(ConstPool cp, String attrname) { this(cp, attrname, new byte[] { 0 }); } /** * @param n the attribute name. */ ParameterAnnotationsAttribute(ConstPool cp, int n, DataInputStream in) throws IOException { super(cp, n, in); } /** * Returns num_parameters. */ public int numParameters() { return info[0] & 0xff; } /** * Copies this attribute and returns a new copy. */ public AttributeInfo copy(ConstPool newCp, Map classnames) { Copier copier = new Copier(info, constPool, newCp, classnames); try { copier.parameters(); return new ParameterAnnotationsAttribute(newCp, getName(), copier.close()); } catch (Exception e) { throw new RuntimeException(e.toString()); } } /** * Parses the annotations and returns a data structure representing * that parsed annotations. Note that changes of the node values of the * returned tree are not reflected on the annotations represented by * this object unless the tree is copied back to this object by * setAnnotations(). * * @return Each element of the returned array represents an array of * annotations that are associated with each method parameter. * * @see #setAnnotations(Annotation[][]) */ public Annotation[][] getAnnotations() { try { return new Parser(info, constPool).parseParameters(); } catch (Exception e) { throw new RuntimeException(e.toString()); } } /** * Changes the annotations represented by this object according to * the given array of Annotation objects. * * @param params the data structure representing the * new annotations. Every element of this array * is an array of Annotation and * it represens annotations of each method parameter. */ public void setAnnotations(Annotation[][] params) { ByteArrayOutputStream output = new ByteArrayOutputStream(); AnnotationsWriter writer = new AnnotationsWriter(output, constPool); try { int n = params.length; writer.numParameters(n); for (int i = 0; i < n; ++i) { Annotation[] anno = params[i]; writer.numAnnotations(anno.length); for (int j = 0; j < anno.length; ++j) anno[j].write(writer); } writer.close(); } catch (IOException e) { throw new RuntimeException(e); // should never reach here. } set(output.toByteArray()); } /** * @param oldname a JVM class name. * @param newname a JVM class name. */ void renameClass(String oldname, String newname) { HashMap map = new HashMap(); map.put(oldname, newname); renameClass(map); } void renameClass(Map classnames) { Renamer renamer = new Renamer(info, getConstPool(), classnames); try { renamer.parameters(); } catch (Exception e) { throw new RuntimeException(e); } } void getRefClasses(Map classnames) { renameClass(classnames); } /** * Returns a string representation of this object. */ public String toString() { Annotation[][] aa = getAnnotations(); StringBuilder sbuf = new StringBuilder(); int k = 0; while (k < aa.length) { Annotation[] a = aa[k++]; int i = 0; while (i < a.length) { sbuf.append(a[i++].toString()); if (i != a.length) sbuf.append(" "); } if (k != aa.length) sbuf.append(", "); } return sbuf.toString(); } }





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