reorg of expression classes

git-svn-id: https://svn.code.sf.net/p/jackcess/code/jackcess/branches/exprs@1058 f203690c-595d-4dc9-a70b-905162fa7fd2

1 files changed, 45 insertions, 0 deletions

diff --git a/src/main/java/com/healthmarketscience/jackcess/expr/Value.java b/src/main/java/com/healthmarketscience/jackcess/expr/Value.java
new file mode 100644
index 0000000..5c1d13f
--- /dev/null
+++ b/src/main/java/com/healthmarketscience/jackcess/expr/Value.java
@@ -0,0 +1,45 @@
+/*
+Copyright (c) 2016 James Ahlborn
+
+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.healthmarketscience.jackcess.expr;
+
+/**
+ *
+ * @author James Ahlborn
+ */
+public interface Value 
+{
+  public enum Type
+  {
+    NULL, BOOLEAN, STRING, DATE, TIME, DATE_TIME, LONG, DOUBLE, BIG_INT, BIG_DEC;
+
+    public boolean isNumeric() {
+      return inRange(LONG, BIG_DEC);
+    }
+
+    public boolean isTemporal() {
+      return inRange(DATE, DATE_TIME);
+    }
+
+    private boolean inRange(Type start, Type end) {
+      return ((start.ordinal() <= ordinal()) && (ordinal() <= end.ordinal()));
+    }
+  }
+
+
+  public Type getType();
+  public Object get();
+}