Enjoy 3.2 release ^_^

src/main/java/com/jfinal/template/expr/ast/RangeArray.java

@@ -0,0 +1,96 @@
+/**
+ * Copyright (c) 2011-2017, James Zhan 詹波 (jfinal@126.com).
+ *
+ * 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.jfinal.template.expr.ast;
+
+import java.util.AbstractList;
+import com.jfinal.template.TemplateException;
+import com.jfinal.template.stat.Location;
+import com.jfinal.template.stat.ParseException;
+import com.jfinal.template.stat.Scope;
+
+/**
+ * RangeArray : [expr .. expr]
+ * 
+ * 用法：
+ * 1：[1..3]
+ * 2：[3..1]
+ */
+public class RangeArray extends Expr {
+	
+	private Expr start;
+	private Expr end;
+	
+	/**
+	 * array : '[' exprList ? | range ? ']'
+	 * exprList : expr (',' expr)*
+	 * range : expr .. expr
+	 */
+	public RangeArray(Expr start, Expr end, Location location) {
+		if (start == null) {
+			throw new ParseException("The start value of range array can not be blank", location);
+		}
+		if (end == null) {
+			throw new ParseException("The end value of range array can not be blank", location);
+		}
+		this.start = start;
+		this.end = end;
+		this.location = location;
+	}
+	
+	public Object eval(Scope scope) {
+		Object startValue = start.eval(scope);
+		if ( !(startValue instanceof Integer) ) {
+			throw new TemplateException("The start value of range array must be Integer", location);
+		}
+		Object endValue = end.eval(scope);
+		if ( !(endValue instanceof Integer) ) {
+			throw new TemplateException("The end value of range array must be Integer", location);
+		}
+		
+		return new RangeList((Integer)startValue, (Integer)endValue, location);
+	}
+	
+	public static class RangeList extends AbstractList<Integer> {
+		
+		final int start;
+		final int size;
+		final int increment;
+		final Location location;
+		
+		public RangeList(int start, int end, Location location) {
+			this.start = start;
+			this.increment = start <= end ? 1 : -1;
+			this.size = Math.abs(end - start) + 1;
+			this.location = location;
+		}
+		
+		public Integer get(int index) {
+			if (index < 0 || index >= size) {
+				throw new TemplateException("Index out of bounds. Index: " + index + ", Size: " + size, location);
+			}
+			return start + index * increment;
+		}
+		
+		public int size() {
+			return size;
+		}
+	}
+}
+
+
+
+