/*
 * Copyright 2002-2018 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
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package org.springframework.expression.spel.ast;

import org.springframework.asm.MethodVisitor;
import org.springframework.expression.TypedValue;
import org.springframework.expression.spel.CodeFlow;
import org.springframework.util.Assert;

Expression language AST node that represents an integer literal.
Author:Andy Clement
Since:3.0
/** * Expression language AST node that represents an integer literal. * * @author Andy Clement * @since 3.0 */
public class IntLiteral extends Literal { private final TypedValue value; public IntLiteral(String payload, int pos, int value) { super(payload, pos); this.value = new TypedValue(value); this.exitTypeDescriptor = "I"; } @Override public TypedValue getLiteralValue() { return this.value; } @Override public boolean isCompilable() { return true; } @Override public void generateCode(MethodVisitor mv, CodeFlow cf) { Integer intValue = (Integer) this.value.getValue(); Assert.state(intValue != null, "No int value"); if (intValue == -1) { // Not sure we can get here because -1 is OpMinus mv.visitInsn(ICONST_M1); } else if (intValue >= 0 && intValue < 6) { mv.visitInsn(ICONST_0 + intValue); } else { mv.visitLdcInsn(intValue); } cf.pushDescriptor(this.exitTypeDescriptor); } }