130 lines
2.6 KiB
Java
130 lines
2.6 KiB
Java
/**
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* Copyright (c) 2011-2019, James Zhan 詹波 (jfinal@126.com).
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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package com.jfinal.template.expr.ast;
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import com.jfinal.template.expr.Sym;
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import com.jfinal.template.stat.Scope;
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/**
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* STR INT LONG FLOAT DOUBLE TRUE FALSE NULL
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*/
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public class Const extends Expr {
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public static final Const TRUE = new Const(Sym.TRUE, Boolean.TRUE);
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public static final Const FALSE = new Const(Sym.FALSE, Boolean.FALSE);
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public static final Const NULL = new Const(Sym.NULL, null);
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private final Sym type;
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private final Object value;
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/**
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* INT LONG FLOAT DOUBLE 常量已在 NumTok 中转换成了确切的类型，无需再次转换
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*/
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public Const(Sym type, Object value) {
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this.type = type;
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this.value = value;
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}
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public Object eval(Scope scope) {
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return value;
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}
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public boolean isStr() {
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return type == Sym.STR;
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}
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public boolean isTrue() {
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return type == Sym.TRUE;
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}
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public boolean isFalse() {
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return type == Sym.FALSE;
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}
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public boolean isBoolean() {
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return type == Sym.TRUE || type == Sym.FALSE;
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}
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public boolean isNull() {
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return type == Sym.NULL;
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}
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public boolean isInt() {
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return type == Sym.INT;
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}
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public boolean isLong() {
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return type == Sym.LONG;
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}
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public boolean isFloat() {
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return type == Sym.FLOAT;
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}
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public boolean isDouble() {
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return type == Sym.DOUBLE;
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}
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public boolean isNumber() {
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return value instanceof Number;
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}
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public Object getValue() {
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return value;
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}
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public String getStr() {
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return (String)value;
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}
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public Boolean getBoolean() {
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return (Boolean)value;
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}
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public Integer getInt() {
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return (Integer)value;
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}
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public Long getLong() {
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return (Long)value;
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}
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public Float getFloat() {
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return (Float)value;
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}
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public Double getDouble() {
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return (Double)value;
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}
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public Number getNumber() {
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return (Number)value;
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}
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public String toString() {
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return value != null ? value.toString() : "null";
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}
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}
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