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

final class RecordComponentWriter extends RecordComponentVisitor {
  
Where the constants used in this RecordComponentWriter must be stored. /** Where the constants used in this RecordComponentWriter must be stored. */
  private final SymbolTable symbolTable;

  // Note: fields are ordered as in the record_component_info structure, and those related to
  // attributes are ordered as in Section 4.7 of the JVMS.

  
The name_index field of the Record attribute. /** The name_index field of the Record attribute. */
  private final int nameIndex;

  
The descriptor_index field of the the Record attribute. /** The descriptor_index field of the the Record attribute. */
  private final int descriptorIndex;

  
The signature_index field of the Signature attribute of this record component, or 0 if there is
no Signature attribute.
/**
   * The signature_index field of the Signature attribute of this record component, or 0 if there is
   * no Signature attribute.
   */
  private int signatureIndex;

  
The last runtime visible annotation of this record component. The previous ones can be accessed with the AnnotationWriter.previousAnnotation field. May be null. /**
   * The last runtime visible annotation of this record component. The previous ones can be accessed
   * with the {@link AnnotationWriter#previousAnnotation} field. May be {@literal null}.
   */
  private AnnotationWriter lastRuntimeVisibleAnnotation;

  
The last runtime invisible annotation of this record component. The previous ones can be accessed with the AnnotationWriter.previousAnnotation field. May be null. /**
   * The last runtime invisible annotation of this record component. The previous ones can be
   * accessed with the {@link AnnotationWriter#previousAnnotation} field. May be {@literal null}.
   */
  private AnnotationWriter lastRuntimeInvisibleAnnotation;

  
The last runtime visible type annotation of this record component. The previous ones can be accessed with the AnnotationWriter.previousAnnotation field. May be null. /**
   * The last runtime visible type annotation of this record component. The previous ones can be
   * accessed with the {@link AnnotationWriter#previousAnnotation} field. May be {@literal null}.
   */
  private AnnotationWriter lastRuntimeVisibleTypeAnnotation;

  
The last runtime invisible type annotation of this record component. The previous ones can be accessed with the AnnotationWriter.previousAnnotation field. May be null. /**
   * The last runtime invisible type annotation of this record component. The previous ones can be
   * accessed with the {@link AnnotationWriter#previousAnnotation} field. May be {@literal null}.
   */
  private AnnotationWriter lastRuntimeInvisibleTypeAnnotation;

  
The first non standard attribute of this record component. The next ones can be accessed with the Attribute.nextAttribute field. May be null. 
WARNING: this list stores the attributes in the reverse order of their visit. firstAttribute is actually the last attribute visited in visitAttribute(Attribute). The putRecordComponentInfo(ByteVector) method writes the attributes in the order defined by this list, i.e. in the reverse order specified by the user. /**
   * The first non standard attribute of this record component. The next ones can be accessed with
   * the {@link Attribute#nextAttribute} field. May be {@literal null}.
   *
   * <p><b>WARNING</b>: this list stores the attributes in the <i>reverse</i> order of their visit.
   * firstAttribute is actually the last attribute visited in {@link #visitAttribute(Attribute)}.
   * The {@link #putRecordComponentInfo(ByteVector)} method writes the attributes in the order
   * defined by this list, i.e. in the reverse order specified by the user.
   */
  private Attribute firstAttribute;

  
Constructs a new RecordComponentWriter. 
Params:
symbolTable – where the constants used in this RecordComponentWriter must be stored.
name – the record component name.
descriptor – the record component descriptor (see Type).
signature – the record component signature. May be null./**
   * Constructs a new {@link RecordComponentWriter}.
   *
   * @param symbolTable where the constants used in this RecordComponentWriter must be stored.
   * @param name the record component name.
   * @param descriptor the record component descriptor (see {@link Type}).
   * @param signature the record component signature. May be {@literal null}.
   */
  RecordComponentWriter(
      final SymbolTable symbolTable,
      final String name,
      final String descriptor,
      final String signature) {
    super(/* latest api = */ Opcodes.ASM9);
    this.symbolTable = symbolTable;
    this.nameIndex = symbolTable.addConstantUtf8(name);
    this.descriptorIndex = symbolTable.addConstantUtf8(descriptor);
    if (signature != null) {
      this.signatureIndex = symbolTable.addConstantUtf8(signature);
    }
  }

  // -----------------------------------------------------------------------------------------------
  // Implementation of the FieldVisitor abstract class
  // -----------------------------------------------------------------------------------------------

  @Override
  public AnnotationVisitor visitAnnotation(final String descriptor, final boolean visible) {
    if (visible) {
      return lastRuntimeVisibleAnnotation =
          AnnotationWriter.create(symbolTable, descriptor, lastRuntimeVisibleAnnotation);
    } else {
      return lastRuntimeInvisibleAnnotation =
          AnnotationWriter.create(symbolTable, descriptor, lastRuntimeInvisibleAnnotation);
    }
  }

  @Override
  public AnnotationVisitor visitTypeAnnotation(
      final int typeRef, final TypePath typePath, final String descriptor, final boolean visible) {
    if (visible) {
      return lastRuntimeVisibleTypeAnnotation =
          AnnotationWriter.create(
              symbolTable, typeRef, typePath, descriptor, lastRuntimeVisibleTypeAnnotation);
    } else {
      return lastRuntimeInvisibleTypeAnnotation =
          AnnotationWriter.create(
              symbolTable, typeRef, typePath, descriptor, lastRuntimeInvisibleTypeAnnotation);
    }
  }

  @Override
  public void visitAttribute(final Attribute attribute) {
    // Store the attributes in the <i>reverse</i> order of their visit by this method.
    attribute.nextAttribute = firstAttribute;
    firstAttribute = attribute;
  }

  @Override
  public void visitEnd() {
    // Nothing to do.
  }

  // -----------------------------------------------------------------------------------------------
  // Utility methods
  // -----------------------------------------------------------------------------------------------

  
Returns the size of the record component JVMS structure generated by this
RecordComponentWriter. Also adds the names of the attributes of this record component in the
constant pool.
Returns:
the size in bytes of the record_component_info of the Record attribute./**
   * Returns the size of the record component JVMS structure generated by this
   * RecordComponentWriter. Also adds the names of the attributes of this record component in the
   * constant pool.
   *
   * @return the size in bytes of the record_component_info of the Record attribute.
   */
  int computeRecordComponentInfoSize() {
    // name_index, descriptor_index and attributes_count fields use 6 bytes.
    int size = 6;
    size += Attribute.computeAttributesSize(symbolTable, 0, signatureIndex);
    size +=
        AnnotationWriter.computeAnnotationsSize(
            lastRuntimeVisibleAnnotation,
            lastRuntimeInvisibleAnnotation,
            lastRuntimeVisibleTypeAnnotation,
            lastRuntimeInvisibleTypeAnnotation);
    if (firstAttribute != null) {
      size += firstAttribute.computeAttributesSize(symbolTable);
    }
    return size;
  }

  
Puts the content of the record component generated by this RecordComponentWriter into the given
ByteVector.
Params:
output – where the record_component_info structure must be put./**
   * Puts the content of the record component generated by this RecordComponentWriter into the given
   * ByteVector.
   *
   * @param output where the record_component_info structure must be put.
   */
  void putRecordComponentInfo(final ByteVector output) {
    output.putShort(nameIndex).putShort(descriptorIndex);
    // Compute and put the attributes_count field.
    // For ease of reference, we use here the same attribute order as in Section 4.7 of the JVMS.
    int attributesCount = 0;
    if (signatureIndex != 0) {
      ++attributesCount;
    }
    if (lastRuntimeVisibleAnnotation != null) {
      ++attributesCount;
    }
    if (lastRuntimeInvisibleAnnotation != null) {
      ++attributesCount;
    }
    if (lastRuntimeVisibleTypeAnnotation != null) {
      ++attributesCount;
    }
    if (lastRuntimeInvisibleTypeAnnotation != null) {
      ++attributesCount;
    }
    if (firstAttribute != null) {
      attributesCount += firstAttribute.getAttributeCount();
    }
    output.putShort(attributesCount);
    Attribute.putAttributes(symbolTable, 0, signatureIndex, output);
    AnnotationWriter.putAnnotations(
        symbolTable,
        lastRuntimeVisibleAnnotation,
        lastRuntimeInvisibleAnnotation,
        lastRuntimeVisibleTypeAnnotation,
        lastRuntimeInvisibleTypeAnnotation,
        output);
    if (firstAttribute != null) {
      firstAttribute.putAttributes(symbolTable, output);
    }
  }

  
Collects the attributes of this record component into the given set of attribute prototypes.
Params:
attributePrototypes – a set of attribute prototypes./**
   * Collects the attributes of this record component into the given set of attribute prototypes.
   *
   * @param attributePrototypes a set of attribute prototypes.
   */
  final void collectAttributePrototypes(final Attribute.Set attributePrototypes) {
    attributePrototypes.addAttributes(firstAttribute);
  }
}