[GitHub] [incubator-linkis] peacewong commented on a diff in pull request #2415: support Variable Operation

[GitBox <gi...@apache.org>]

peacewong commented on code in PR #2415:
URL: https://github.com/apache/incubator-linkis/pull/2415#discussion_r914388428


##########
linkis-commons/linkis-common/src/main/java/org/apache/linkis/common/utils/VariableOperationUtils.java:
##########
@@ -0,0 +1,292 @@
+/*
+ * 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.linkis.common.utils;
+
+import com.fasterxml.jackson.databind.JsonNode;
+import com.fasterxml.jackson.databind.node.ArrayNode;
+import com.fasterxml.jackson.databind.node.ObjectNode;
+import org.apache.commons.lang3.StringUtils;
+
+import java.time.Instant;
+import java.time.LocalDateTime;
+import java.time.ZoneId;
+import java.time.ZonedDateTime;
+import java.time.format.DateTimeFormatter;
+import java.util.Date;
+import java.util.Iterator;
+import java.util.Map;
+
+/**
+ *
+ * support variable operation
+ * ${yyyyMMdd%-1d}/${yyyy-MM-01%-2M}
+ * Date: 2021/5/7 11:10
+ */
+public class VariableOperationUtils {
+
+    private static final String DOLLAR = "$";
+    private static final String PLACEHOLDER_SPLIT = "%";
+    private static final String PLACEHOLDER_LEFT = "{";
+    private static final String PLACEHOLDER_RIGHT = "}";
+    private static final String CYCLE_YEAR = "y";
+    private static final String CYCLE_MONTH = "M";
+    private static final String CYCLE_DAY = "d";
+    private static final String CYCLE_HOUR = "H";
+    private static final String CYCLE_MINUTE = "m";
+    private static final String CYCLE_SECOND = "s";
+    private static final String[] CYCLES  = new String[]{CYCLE_YEAR, CYCLE_MONTH, CYCLE_DAY, CYCLE_HOUR, CYCLE_MINUTE, CYCLE_SECOND};
+
+    /**
+     * yyyy-MM-dd HH:mm:ss
+     * @param date
+     * @return
+     */
+    public static ZonedDateTime toZonedDateTime(Date date) {
+        Instant instant = date.toInstant();
+        ZoneId zoneId = ZoneId.systemDefault();
+        LocalDateTime localDateTime = instant.atZone(zoneId).toLocalDateTime();
+        return ZonedDateTime.of(localDateTime,zoneId);
+    }
+
+    /**
+     * json support variable operation
+     * @param dateTime
+     * @param str
+     * @return
+     */
+    public static String replaces(ZonedDateTime dateTime,String str){
+        return replaces(dateTime,str,true);
+    }
+
+
+    /**
+     * json support variable operation
+     * @param dateTime
+     * @param str
+     * @param format
+     * @return
+     */
+    public static String replaces(ZonedDateTime dateTime,String str,boolean format){
+        try {
+            JsonNode rootNode = JsonUtils.jackson().readTree(str);
+            if (rootNode.isArray() || rootNode.isObject()){
+                replaceJson(dateTime,rootNode);
+                return rootNode.toString();
+            }
+        }catch (Exception e){}
+        return replace(dateTime,str);
+    }
+
+    /**
+     *
+     * @param dateTime
+     * @param str
+     * @return
+     */
+    private static String replace(ZonedDateTime dateTime, String str){
+        StringBuilder buffer = new StringBuilder(str);
+        int startIndex = str.indexOf(PLACEHOLDER_LEFT);
+
+        while (startIndex != -1) {
+            int endIndex = buffer.indexOf(PLACEHOLDER_RIGHT, startIndex);
+            if (endIndex != -1) {
+                String placeHolder = buffer.substring(startIndex, endIndex + 1);
+                String content = placeHolder.replace(PLACEHOLDER_LEFT, "").replace(PLACEHOLDER_RIGHT, "").trim();
+                String[] parts = content.split(PLACEHOLDER_SPLIT);
+                try{
+                    ZonedDateTime ndt = dateTime;
+                    for(int i = 1;i< parts.length;i++){
+                        ndt = changeDateTime(ndt,parts[i]);
+                    }
+
+                    String newContent = ndt.format(DateTimeFormatter.ofPattern(parts[0]));
+                    if (buffer.substring(startIndex -1 ,endIndex + 1).contains(DOLLAR)){
+                        buffer.replace(startIndex - 1, endIndex + 1, newContent);
+                    }else {
+                        buffer.replace(startIndex, endIndex + 1, newContent);
+                    }
+                    startIndex = buffer.indexOf(PLACEHOLDER_LEFT, startIndex + newContent.length());
+                }catch (IllegalArgumentException e1){
+                    startIndex = buffer.indexOf(PLACEHOLDER_LEFT, endIndex);
+
+                } catch (Exception e2){
+                    throw new RuntimeException(e2);

Review Comment:
   Linkis exception should be thrown, you can refer to https://linkis.apache.org/zh-CN/community/development_specification/exception_catch



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