Import code from internal repository to git

java/com/google/domain/registry/whois/WhoisException.java

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+// Copyright 2016 Google Inc. All Rights Reserved.
+//
+// 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
+//
+//     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 com.google.domain.registry.whois;
+
+import static com.google.common.base.Preconditions.checkArgument;
+import static com.google.common.base.Preconditions.checkNotNull;
+
+import org.joda.time.DateTime;
+
+import javax.annotation.Nullable;
+
+/** Exception that gets thrown when WHOIS command isn't successful. */
+public final class WhoisException extends Exception implements WhoisResponse {
+
+  private final DateTime timestamp;
+  private final int status;
+
+  /** @see #WhoisException(DateTime, int, String, Throwable) */
+  WhoisException(DateTime timestamp, int status, String message) {
+    this(timestamp, status, message, null);
+  }
+
+  /**
+   * Construct an exception explaining why a WHOIS request has failed.
+   *
+   * @param timestamp should be set to the time at which this request was processed.
+   * @param status A non-2xx HTTP status code to indicate type of failure.
+   * @param message is displayed to the user so you should be careful about tainted data.
+   * @param cause the original exception or {@code null}.
+   * @throws IllegalArgumentException if {@code !(300 <= status < 700)}
+   */
+  WhoisException(DateTime timestamp, int status, String message, @Nullable Throwable cause) {
+    super(message, cause);
+    checkArgument(300 <= status && status < 700,
+        "WhoisException status must be a non-2xx HTTP status code: %s", status);
+    this.timestamp = checkNotNull(timestamp, "timestamp");
+    this.status = status;
+  }
+
+  /** Returns the time at which this WHOIS request was processed. */
+  @Override
+  public DateTime getTimestamp() {
+    return timestamp;
+  }
+
+  /** Returns a non-2xx HTTP status code to differentiate types of failure. */
+  public int getStatus() {
+    return status;
+  }
+
+  @Override
+  public String getPlainTextOutput(boolean preferUnicode) {
+    String footer = new WhoisResponseImpl.BasicEmitter()
+        .emitNewline()
+        .emitFooter(getTimestamp())
+        .toString();
+    return getMessage() + footer;
+  }
+}