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// Portions Copyright [2019] Payara Foundation and/or affiliates

package com.sun.jdo.api.persistence.enhancer.classfile;

import java.io.DataInputStream;
import java.io.DataOutputStream;
import java.io.IOException;

/**
 * Class representing a unicode string value in the constant pool
 */

/*
 * Note: evidence suggests that this is no longer part of the java VM
 * spec.
 */

public class ConstUnicode extends ConstBasic {
  /* The tag associated with ConstClass entries */
  public static final int MyTag = CONSTANTUnicode;

  /* The unicode string of interest */
  private String stringValue;

  /* public accessors */

  /**
   * The tag of this constant entry
   */
  public int tag () { return MyTag; }

  /**
   * return the value associated with the entry
   */
  public String asString() {
    return stringValue;
  }

  /**
   * A printable representation
   */
  public String toString () {
      return "CONSTANTUnicode(" + indexAsString() + "): " + stringValue;//NOI18N
  }

  /* package local methods */

  ConstUnicode (String s) {
    stringValue = s;
  }

  void formatData (DataOutputStream b) throws IOException {
    b.writeBytes(stringValue);
  }

  static ConstUnicode read (DataInputStream input) throws IOException {
    int count = input.readShort(); // Is this chars or bytes?
    StringBuilder b = new StringBuilder();
    for (int i=0; i < count; i++) {
      b.append(input.readChar());
    }
    return new ConstUnicode (b.toString());
  }

  void resolve (ConstantPool p) {
  }
}