DolphinScheduler/dolphinscheduler-master/src/main/java/org/apache/dolphinscheduler/server/master/utils/SwitchTaskUtils.java

/*
 * 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.dolphinscheduler.server.master.utils;

import org.apache.dolphinscheduler.plugin.task.api.model.Property;
import org.apache.dolphinscheduler.plugin.task.api.utils.ParameterUtils;

import org.apache.commons.collections4.MapUtils;

import java.util.Map;
import java.util.regex.Matcher;
import java.util.regex.Pattern;

import javax.script.ScriptException;

import lombok.extern.slf4j.Slf4j;

import com.google.common.collect.Maps;

import delight.nashornsandbox.NashornSandbox;
import delight.nashornsandbox.NashornSandboxes;

@Slf4j
public class SwitchTaskUtils {

    private static final NashornSandbox sandbox;
    private static final String rgex = "['\"]*\\$\\{(.*?)\\}['\"]*";

    static {
        sandbox = NashornSandboxes.create();
    }

    public static boolean evaluate(String expression) throws ScriptException {
        Object result = sandbox.eval(expression);
        return Boolean.TRUE.equals(result);
    }

    public static String generateContentWithTaskParams(String condition, Map<String, Property> globalParams,
                                                       Map<String, Property> varParams) {
        String content = condition.replaceAll("'", "\"");
        if (MapUtils.isEmpty(globalParams) && MapUtils.isEmpty(varParams)) {
            return content;
        }
        Map<String, Property> params = Maps.newHashMap();
        if (MapUtils.isNotEmpty(globalParams)) {
            params.putAll(globalParams);
        }
        if (MapUtils.isNotEmpty(varParams)) {
            params.putAll(varParams);
        }
        String originContent = content;
        Pattern pattern = Pattern.compile(rgex);
        Matcher m = pattern.matcher(content);
        while (m.find()) {
            String paramName = m.group(1);
            Property property = params.get(paramName);
            if (property == null) {
                continue;
            }
            String value;
            if (ParameterUtils.isNumber(property) || ParameterUtils.isBoolean(property)) {
                value = "" + ParameterUtils.getParameterValue(property);
            } else {
                value = "\"" + ParameterUtils.getParameterValue(property) + "\"";
            }
            log.info("paramName:{}，paramValue:{}", paramName, value);
            content = content.replace("${" + paramName + "}", value);
        }

        // if not replace any params, throw exception to avoid illegal condition
        if (originContent.equals(content)) {
            throw new IllegalArgumentException("condition is not valid, please check it. condition: " + condition);
        }
        return content;
    }

}