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/*
 * Copyright 2014 the original author or authors.
 *
 * 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 leap.lang.el.spel.ast;

import leap.lang.el.ElEvalContext;


public class AstNumber extends AstLiteral {
	
	private Number value;
	
	public AstNumber() {
		
	}
	
	public AstNumber(Number value) {
		this.value	    = value;
		this.resultType = null != value ? value.getClass() : null;
	}
	
	public Number getValue() {
		return value;
	}
	
    @Override
    public Object getLiteralValue() {
	    return value;
    }

	public void toString(StringBuilder buf) {
    	if (value == null) {
    		buf.append("NULL");
    	} else {
    		buf.append(value.toString());
    	}
    }

	@Override
    public Object eval(ElEvalContext context) {
	    return value;
    }
	
    protected void doAccept(AstVisitor visitor) {
        visitor.startVisit(this);
        visitor.endVisit(this);
    }
}