Enjoy 3.2 release ^_^

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

@@ -0,0 +1,150 @@
+/**
+ * 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 com.jfinal.template.expr.Sym;
+import com.jfinal.template.stat.Scope;
+
+/**
+ * STR INT LONG FLOAT DOUBLE true false null
+ */
+public class Const extends Expr {
+	
+	public static final Const TRUE = new Const(Boolean.TRUE, Sym.TRUE);
+	public static final Const FALSE = new Const(Boolean.FALSE, Sym.FALSE);
+	public static final Const NULL = new Const(null, Sym.NULL);
+	
+	private Sym type;
+	private Object value;
+	
+	/**
+	 * 构造 TRUE FALSE NULL 常量，无需对 value 进行转换
+	 */
+	private Const(Object value, Sym type) {
+		this.type = type;
+		this.value = value;
+	}
+	
+	public Const(Sym type, String value) {
+		this.type = type;
+		this.value = typeConvert(type, value);
+	}
+	
+	private Object typeConvert(Sym type, String value) {
+		switch (type) {
+		case STR:
+			return value;
+		case INT:
+			return Integer.parseInt(value);
+		case LONG:
+			return Long.parseLong(value);
+		case FLOAT:
+			return Float.parseFloat(value);
+		case DOUBLE:
+			return Double.parseDouble(value);
+		/*
+		case TRUE:
+		case FALSE:
+			return Boolean.parseBoolean(value);
+		case NULL:
+			return null;
+		*/
+		default:
+			throw new RuntimeException("never happend");
+		}
+	}
+	
+	public Object eval(Scope scope) {
+		return value;
+	}
+	
+	public String toString() {
+		return value.toString();
+	}
+	
+	public boolean isStr() {
+		return type == Sym.STR;
+	}
+	
+	public boolean isTrue() {
+		return type == Sym.TRUE;
+	}
+	
+	public boolean isFalse() {
+		return type == Sym.FALSE;
+	}
+	
+	public boolean isBoolean() {
+		return type == Sym.TRUE || type == Sym.FALSE;
+	}
+	
+	public boolean isNull() {
+		return type == Sym.NULL;
+	}
+	
+	public boolean isInt() {
+		return type == Sym.INT;
+	}
+	
+	public boolean isLong() {
+		return type == Sym.LONG;
+	}
+	
+	public boolean isFloat() {
+		return type == Sym.FLOAT;
+	}
+	
+	public boolean isDouble() {
+		return type == Sym.DOUBLE;
+	}
+	
+	public Object getValue() {
+		return value;
+	}
+	
+	public String getStr() {
+		return (String)value;
+	}
+	
+	public Boolean getBoolean() {
+		return (Boolean)value;
+	}
+	
+	public Integer getInt() {
+		return (Integer)value;
+	}
+	
+	public Long getLong() {
+		return (Long)value;
+	}
+	
+	public Float getFloat() {
+		return (Float)value;
+	}
+	
+	public Double getDouble() {
+		return (Double)value;
+	}
+}
+
+
+
+
+
+
+
+