content: /*
   * Copyright 2013-2025 Real Logic Limited.
   *
   * Licensed 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 uk.co.real_logic.sbe.xml;
  
  import java.io.PrintStream;
  
  /**
   * Class to hold error handling state while parsing an XML message schema.
   */
  public class ErrorHandler
  {
      private final PrintStream out;
      private final boolean stopOnError;
      private final boolean warningsFatal;
      private final boolean suppressOutput;
      private int errors = 0;
      private int warnings = 0;
  
      /**
       * Construct a new {@link ErrorHandler} that outputs to a provided {@link PrintStream} which overrides the value
       * set in {@link ParserOptions#errorPrintStream()}.
       *
       * @param stream  to which output should be sent.
       * @param options the parsing options.
       */
      public ErrorHandler(final PrintStream stream, final ParserOptions options)
      {
          out = stream;
          stopOnError = options.stopOnError();
          warningsFatal = options.warningsFatal();
          suppressOutput = options.suppressOutput();
      }
  
      /**
       * Default {@link ErrorHandler} that outputs to {@link System#err} if {@link ParserOptions#errorPrintStream()} is
       * not set.
       *
       * @param options the parsing options.
       */
      public ErrorHandler(final ParserOptions options)
      {
          this(options.errorPrintStream() != null ? options.errorPrintStream() : System.err, options);
      }
  
      /**
       * Record a message signifying an error condition.
       *
       * @param msg signifying an error.
       */
      public void error(final String msg)
      {
          errors++;
  
          if (!suppressOutput)
          {
              out.println("ERROR: " + msg);
          }
  
          if (stopOnError)
          {
              throw new IllegalArgumentException(msg);
          }
      }
  
      /**
       * Record a message signifying a warning condition.
       *
       * @param msg signifying a warning.
       */
      public void warning(final String msg)
      {
          warnings++;
  
          if (!suppressOutput)
          {
              out.println("WARNING: " + msg);
          }
  
          if (warningsFatal && stopOnError)
          {
              throw new IllegalArgumentException(msg);
          }
      }
  
      /**
       * Check if the parser should exit.
       *
       * @throws IllegalStateException if there are errors or warnings recorded.
       */
      public void checkIfShouldExit()
      {
          if (errors > 0)
          {
              throw new IllegalStateException("had " + errors + (errors > 1 ? " errors" : " error"));
          }
          else if (warnings > 0 && warningsFatal)
          {
              throw new IllegalStateException("had " + warnings + (warnings > 1 ? " warnings" : " warning"));
          }
      }
  
      /**
       * The count of errors encountered.
       *
       * @return the count of errors encountered.
       */
      public int errorCount()
      {
          return errors;
      }
  
      /**
       * The count of warnings encountered.
       *
       * @return the count of warnings encountered.
       */
      public int warningCount()
      {
          return warnings;
      }
  
      /**
       * {@inheritDoc}
       */
      public String toString()
      {
          return "ErrorHandler{" +
              "out=" + out +
              ", stopOnError=" + stopOnError +
              ", warningsFatal=" + warningsFatal +
              ", suppressOutput=" + suppressOutput +
              ", errors=" + errors +
              ", warnings=" + warnings +
              '}';
      }
  }
  