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The Apache Commons JEXL library is an implementation of the JSTL Expression Language with extensions.

There is a newer version: 3.4.0

/*
 * 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.jexl3.parser;

public final class ASTNumberLiteral extends JexlNode implements JexlNode.Constant {
    private final NumberParser nlp;

    ASTNumberLiteral(int id) {
        super(id);
        nlp = new NumberParser();
    }

    ASTNumberLiteral(Parser p, int id) {
        super(p, id);
        nlp = new NumberParser();
    }

    @Override
    public String toString() {
        return nlp.toString();
    }

    @Override
    public Number getLiteral() {
        return nlp.getLiteralValue();
    }

    @Override
    protected boolean isConstant(boolean literal) {
        return true;
    }

    public Class getLiteralClass() {
        return nlp.getLiteralClass();
    }

    public boolean isInteger() {
        return nlp.isInteger();
    }

    /**
     * Sets this node as a natural literal.
     * Originally from OGNL.
     * @param s the natural as string
     */
    void setNatural(String s) {
        nlp.setNatural(s);
    }

    /**
     * Sets this node as a real literal.
     * Originally from OGNL.
     * @param s the real as string
     */
    void setReal(String s) {
        nlp.setReal(s);
    }

    @Override
    public Object jjtAccept(ParserVisitor visitor, Object data) {
        return visitor.visit(this, data);
    }
}