Start of [CSV-53] Allow to always enclose printed values into quotes.

git-svn-id: https://svn.apache.org/repos/asf/commons/proper/csv/trunk@1398000 13f79535-47bb-0310-9956-ffa450edef68

Author: garydgregory

src/main/java/org/apache/commons/csv/Quote.java

@@ -0,0 +1,47 @@
+/*
+ * 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.commons.csv;
+
+/**
+ * Defines quote behavior when printing.
+ */
+public enum Quote {
+
+    /**
+     * Quotes all fields.
+     */
+    ALL,
+
+    /**
+     * Quotes fields which contain special characters such as a delimiter, encapsulator or any of the characters in
+     * line separator.
+     */
+    MINIMAL,
+
+    /**
+     * Quotes all non-numeric fields.
+     */
+
+    NON_NUMERIC,
+
+    /**
+     * Never quotes fields. When the delimiter occurs in data, it is preceded by the current escape character. If the
+     * escape character is not set, printing will thrown an exception if any characters that require escaping are
+     * encountered.
+     */
+    NONE
+}