server/src/test/java/org/apache/calcite/avatica/ExceptionUtils.java

/*
 * 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.calcite.avatica;

import java.io.PrintWriter;
import java.io.StringWriter;
import java.util.Objects;

/** Prints full stacktrace of {@link java.lang.Throwable} as a {@code String}. */
public class ExceptionUtils {
  private ExceptionUtils() {
    // The constructor is extremely secret
  }

  /** Prints full stacktrace of {@link java.lang.Throwable} as a {@code String}.
   * @param e exception
   * @return string representation of a given exception
   */
  public static String toString(Exception e) {
    //noinspection ThrowableResultOfMethodCallIgnored
    Objects.requireNonNull(e);
    StringWriter sw = new StringWriter();
    PrintWriter pw = new PrintWriter(sw);
    e.printStackTrace(pw);
    pw.flush();
    return sw.toString();
  }
}

// End ExceptionUtils.java