/* * 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 io.xream.x7.common.util; import org.springframework.expression.EvaluationContext; import org.springframework.expression.ExpressionParser; import org.springframework.expression.spel.standard.SpelExpressionParser; import org.springframework.expression.spel.support.StandardEvaluationContext; import org.springframework.util.Assert; public class KeyUtil { private KeyUtil() { } public static String makeKey(String prefix, String suffix, String condition, Object[] args) { Assert.notNull(condition, "condition can not null"); if (args != null && args.length > 0 && condition.contains("#")) { Object obj = args[0]; if (obj != null) { ExpressionParser parser = new SpelExpressionParser(); int start = condition.indexOf("#") + 1; int end = 0; if (condition.contains(".")) { end = condition.indexOf("."); } else { end = condition.indexOf(" "); } String objName = condition.substring(start, end).trim(); EvaluationContext ctx = new StandardEvaluationContext(); ctx.setVariable(objName, obj); condition = parser.parseExpression(condition).getValue(ctx, String.class); } } String key = VerifyUtil.toMD5(prefix + condition) + suffix; return key; } }