/*
* Copyright 2002-2009 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 org.springframework.expression.spel.ast;
/**
* Common supertype for operators that operate on either one or two operands. In the case of multiply or divide there
* would be two operands, but for unary plus or minus, there is only one.
*
* @author Andy Clement
* @since 3.0
*/
public abstract class Operator extends SpelNodeImpl {
String operatorName;
public Operator(String payload,int pos,SpelNodeImpl... operands) {
super(pos, operands);
this.operatorName = payload;
}
public SpelNodeImpl getLeftOperand() {
return children[0];
}
public SpelNodeImpl getRightOperand() {
return children[1];
}
public final String getOperatorName() {
return operatorName;
}
/**
* String format for all operators is the same '(' [operand] [operator] [operand] ')'
*/
@Override
public String toStringAST() {
StringBuilder sb = new StringBuilder();
sb.append("(");
sb.append(getChild(0).toStringAST());
for (int i = 1; i < getChildCount(); i++) {
sb.append(" ").append(getOperatorName()).append(" ");
sb.append(getChild(i).toStringAST());
}
sb.append(")");
return sb.toString();
}
}
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