1 files changed, 76 insertions, 0 deletions
diff --git a/sql/hive-thriftserver/src/main/java/org/apache/hive/service/cli/CLIServiceUtils.java b/sql/hive-thriftserver/src/main/java/org/apache/hive/service/cli/CLIServiceUtils.java
new file mode 100644
index 0000000000..9d64b102e0
--- /dev/null
+++ b/sql/hive-thriftserver/src/main/java/org/apache/hive/service/cli/CLIServiceUtils.java
@@ -0,0 +1,76 @@
+/**
+ * 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.hive.service.cli;
+
+import org.apache.log4j.Layout;
+import org.apache.log4j.PatternLayout;
+
+/**
+ * CLIServiceUtils.
+ *
+ */
+public class CLIServiceUtils {
+
+
+  private static final char SEARCH_STRING_ESCAPE = '\\';
+  public static final Layout verboseLayout = new PatternLayout(
+    "%d{yy/MM/dd HH:mm:ss} %p %c{2}: %m%n");
+  public static final Layout nonVerboseLayout = new PatternLayout(
+    "%-5p : %m%n");
+
+  /**
+   * Convert a SQL search pattern into an equivalent Java Regex.
+   *
+   * @param pattern input which may contain '%' or '_' wildcard characters, or
+   * these characters escaped using {@link #getSearchStringEscape()}.
+   * @return replace %/_ with regex search characters, also handle escaped
+   * characters.
+   */
+  public static String patternToRegex(String pattern) {
+    if (pattern == null) {
+      return ".*";
+    } else {
+      StringBuilder result = new StringBuilder(pattern.length());
+
+      boolean escaped = false;
+      for (int i = 0, len = pattern.length(); i < len; i++) {
+        char c = pattern.charAt(i);
+        if (escaped) {
+          if (c != SEARCH_STRING_ESCAPE) {
+            escaped = false;
+          }
+          result.append(c);
+        } else {
+          if (c == SEARCH_STRING_ESCAPE) {
+            escaped = true;
+            continue;
+          } else if (c == '%') {
+            result.append(".*");
+          } else if (c == '_') {
+            result.append('.');
+          } else {
+            result.append(Character.toLowerCase(c));
+          }
+        }
+      }
+      return result.toString();
+    }
+  }
+
+}