/*
    * Licensed to the Apache Software Foundation (ASF) under one
    * or more contributor license agreements.  See the NOTICE file
    * distributed with this work for additional information
    * regarding copyright ownership.  The ASF licenses this file
    * to you under the Apache License, Version 2.0 (the
    * "License"); you may not use this file except in compliance
    * with the License.  You may obtain a copy of the License at
    *
   *   https://www.apache.org/licenses/LICENSE-2.0
   *
   * Unless required by applicable law or agreed to in writing,
   * software distributed under the License is distributed on an
   * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
   * KIND, either express or implied.  See the License for the
   * specific language governing permissions and limitations
   * under the License.
   */
  package org.apache.commons.compress.harmony.unpack200.bytecode;
  
  import java.io.DataOutputStream;
  import java.io.IOException;
  import java.util.ArrayList;
  import java.util.List;
  
  /**
   * Parameter annotations class file attribute, either a RuntimeVisibleParameterAnnotations attribute or a RuntimeInvisibleParameterAnnotations attribute.
   */
  public class RuntimeVisibleorInvisibleParameterAnnotationsAttribute extends AnnotationsAttribute {
  
      /**
       * ParameterAnnotation represents the annotations on a single parameter.
       */
      public static class ParameterAnnotation {
  
          private final Annotation[] annotations;
  
          /**
           * Constructs a new instance.
           *
           * @param annotations Annotation.
           */
          public ParameterAnnotation(final Annotation[] annotations) {
              this.annotations = annotations;
          }
  
          /**
           * Gets all annotation class file entries.
           *
           * @return all annotation class file entries.
           */
          public List<Object> getClassFileEntries() {
              final List<Object> nested = new ArrayList<>();
              for (final Annotation annotation : annotations) {
                  nested.addAll(annotation.getClassFileEntries());
              }
              return nested;
          }
  
          /**
           * Gets the cumulative length of all annotations.
           *
           * @return the cumulative length of all annotations.
           */
          public int getLength() {
              int length = 2;
              for (final Annotation annotation : annotations) {
                  length += annotation.getLength();
              }
              return length;
          }
  
          /**
           * Resolves all annotations in this instance against the given pool.
           *
           * @param pool A class constant pool.
           */
          public void resolve(final ClassConstantPool pool) {
              for (final Annotation annotation : annotations) {
                  annotation.resolve(pool);
              }
          }
  
          /**
           * Writes this body to the given output stream.
           *
           * @param dos the output stream.
           * @throws IOException if an I/O error occurs.
           */
          public void writeBody(final DataOutputStream dos) throws IOException {
              dos.writeShort(annotations.length);
              for (final Annotation annotation : annotations) {
                  annotation.writeBody(dos);
              }
          }
  
      }
  
      private final ParameterAnnotation[] parameterAnnotations;
 
     /**
      * Constructs a new instance for an attribute name.
      *
      * @param name an attribute name.
      * @param parameterAnnotations Annotations.
      */
     public RuntimeVisibleorInvisibleParameterAnnotationsAttribute(final CPUTF8 name, final ParameterAnnotation[] parameterAnnotations) {
         super(name);
         this.parameterAnnotations = parameterAnnotations;
     }
 
     @Override
     protected int getLength() {
         int length = 1;
         for (final ParameterAnnotation parameterAnnotation : parameterAnnotations) {
             length += parameterAnnotation.getLength();
         }
         return length;
     }
 
     @Override
     protected ClassFileEntry[] getNestedClassFileEntries() {
         final List<Object> nested = new ArrayList<>();
         nested.add(attributeName);
         for (final ParameterAnnotation parameterAnnotation : parameterAnnotations) {
             nested.addAll(parameterAnnotation.getClassFileEntries());
         }
         return nested.toArray(NONE);
     }
 
     @Override
     protected void resolve(final ClassConstantPool pool) {
         super.resolve(pool);
         for (final ParameterAnnotation parameterAnnotation : parameterAnnotations) {
             parameterAnnotation.resolve(pool);
         }
     }
 
     @Override
     public String toString() {
         return attributeName.underlyingString() + ": " + parameterAnnotations.length + " parameter annotations";
     }
 
     @Override
     protected void writeBody(final DataOutputStream dos) throws IOException {
         dos.writeByte(parameterAnnotations.length);
         for (final ParameterAnnotation parameterAnnotation : parameterAnnotations) {
             parameterAnnotation.writeBody(dos);
         }
     }
 
 }