/*
    *  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
    *
    *     http://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;
          private final int numAnnotations;
  
          public ParameterAnnotation(final Annotation[] annotations) {
              this.numAnnotations = annotations.length;
              this.annotations = annotations;
          }
  
          public List<Object> getClassFileEntries() {
              final List<Object> nested = new ArrayList<>();
              for (final Annotation annotation : annotations) {
                  nested.addAll(annotation.getClassFileEntries());
              }
              return nested;
          }
  
          public int getLength() {
              int length = 2;
              for (final Annotation annotation : annotations) {
                  length += annotation.getLength();
              }
              return length;
          }
  
          public void resolve(final ClassConstantPool pool) {
              for (final Annotation annotation : annotations) {
                  annotation.resolve(pool);
              }
          }
  
          public void writeBody(final DataOutputStream dos) throws IOException {
              dos.writeShort(numAnnotations);
              for (final Annotation annotation : annotations) {
                  annotation.writeBody(dos);
              }
          }
  
      }
  
      private final int numParameters;
  
      private final ParameterAnnotation[] parameterAnnotations;
  
      public RuntimeVisibleorInvisibleParameterAnnotationsAttribute(final CPUTF8 name, final ParameterAnnotation[] parameterAnnotations) {
          super(name);
          this.numParameters = parameterAnnotations.length;
          this.parameterAnnotations = parameterAnnotations;
      }
  
      @Override
      protected int getLength() {
          int length = 1;
          for (int i = 0; i < numParameters; i++) {
              length += parameterAnnotations[i].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(ClassFileEntry.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() + ": " + numParameters + " parameter annotations";
     }
 
     @Override
     protected void writeBody(final DataOutputStream dos) throws IOException {
         dos.writeByte(numParameters);
         for (int i = 0; i < numParameters; i++) {
             parameterAnnotations[i].writeBody(dos);
         }
     }
 
 }