// ASM: a very small and fast Java bytecode manipulation framework
// Copyright (c) 2000-2011 INRIA, France Telecom
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package org.objectweb.asm.util;

import org.objectweb.asm.AnnotationVisitor;
import org.objectweb.asm.Attribute;
import org.objectweb.asm.Opcodes;
import org.objectweb.asm.RecordComponentVisitor;
import org.objectweb.asm.TypePath;
import org.objectweb.asm.TypeReference;

A RecordComponentVisitor that checks that its methods are properly used. 
Author:
Eric Bruneton, Remi Forax/**
 * A {@link RecordComponentVisitor} that checks that its methods are properly used.
 *
 * @author Eric Bruneton
 * @author Remi Forax
 */
public class CheckRecordComponentAdapter extends RecordComponentVisitor {

  
Whether the visitEndExperimental() method has been called. /** Whether the {@link #visitEndExperimental()} method has been called. */
  private boolean visitEndCalled;

  
Constructs a new CheckRecordComponentAdapter. Subclasses must not use this
constructor. Instead, they must use the CheckRecordComponentAdapter(int, RecordComponentVisitor) version. 
Params:
recordComponentVisitor – the record component visitor to which this adapter must delegate
    calls.
Throws:
IllegalStateException – If a subclass calls this constructor./**
   * Constructs a new {@link CheckRecordComponentAdapter}. <i>Subclasses must not use this
   * constructor</i>. Instead, they must use the {@link #CheckRecordComponentAdapter(int,
   * RecordComponentVisitor)} version.
   *
   * @param recordComponentVisitor the record component visitor to which this adapter must delegate
   *     calls.
   * @throws IllegalStateException If a subclass calls this constructor.
   */
  public CheckRecordComponentAdapter(final RecordComponentVisitor recordComponentVisitor) {
    // TODO: add 'latest api =' comment when no longer experimental.
    this(Opcodes.ASM8_EXPERIMENTAL, recordComponentVisitor);
    if (getClass() != CheckRecordComponentAdapter.class) {
      throw new IllegalStateException();
    }
  }

  
Constructs a new CheckRecordComponentAdapter. 
Params:
api – the ASM API version implemented by this visitor. Must be Opcodes.ASM8_EXPERIMENTAL.
recordComponentVisitor – the record component visitor to which this adapter must delegate
    calls./**
   * Constructs a new {@link CheckRecordComponentAdapter}.
   *
   * @param api the ASM API version implemented by this visitor. Must be {@link
   *     Opcodes#ASM8_EXPERIMENTAL}.
   * @param recordComponentVisitor the record component visitor to which this adapter must delegate
   *     calls.
   */
  protected CheckRecordComponentAdapter(
      final int api, final RecordComponentVisitor recordComponentVisitor) {
    super(api, recordComponentVisitor);
  }

  @Override
  public AnnotationVisitor visitAnnotationExperimental(
      final String descriptor, final boolean visible) {
    checkVisitEndNotCalled();
    // Annotations can only appear in V1_5 or more classes.
    CheckMethodAdapter.checkDescriptor(Opcodes.V1_5, descriptor, false);
    return new CheckAnnotationAdapter(super.visitAnnotationExperimental(descriptor, visible));
  }

  @Override
  public AnnotationVisitor visitTypeAnnotationExperimental(
      final int typeRef, final TypePath typePath, final String descriptor, final boolean visible) {
    checkVisitEndNotCalled();
    int sort = new TypeReference(typeRef).getSort();
    if (sort != TypeReference.FIELD) {
      throw new IllegalArgumentException(
          "Invalid type reference sort 0x" + Integer.toHexString(sort));
    }
    CheckClassAdapter.checkTypeRef(typeRef);
    CheckMethodAdapter.checkDescriptor(Opcodes.V1_5, descriptor, false);
    return new CheckAnnotationAdapter(
        super.visitTypeAnnotationExperimental(typeRef, typePath, descriptor, visible));
  }

  @Override
  public void visitAttributeExperimental(final Attribute attribute) {
    checkVisitEndNotCalled();
    if (attribute == null) {
      throw new IllegalArgumentException("Invalid attribute (must not be null)");
    }
    super.visitAttributeExperimental(attribute);
  }

  @Override
  public void visitEndExperimental() {
    checkVisitEndNotCalled();
    visitEndCalled = true;
    super.visitEndExperimental();
  }

  private void checkVisitEndNotCalled() {
    if (visitEndCalled) {
      throw new IllegalStateException("Cannot call a visit method after visitEnd has been called");
    }
  }
}