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145 lines
5.0 KiB
145 lines
5.0 KiB
/* |
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* Licensed to the Apache Software Foundation (ASF) under one or more |
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* contributor license agreements. See the NOTICE file distributed with |
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* this work for additional information regarding copyright ownership. |
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* The ASF licenses this file to You under the Apache License, Version 2.0 |
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* (the "License"); you may not use this file except in compliance with |
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* the License. You may obtain a copy of the License at |
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* |
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* http://www.apache.org/licenses/LICENSE-2.0 |
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* |
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* Unless required by applicable law or agreed to in writing, software |
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* distributed under the License is distributed on an "AS IS" BASIS, |
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
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* See the License for the specific language governing permissions and |
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* limitations under the License. |
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*/ |
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package org.apache.dolphinscheduler.common.sql; |
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import org.apache.commons.lang3.StringUtils; |
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import java.io.IOException; |
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import java.io.InputStream; |
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import java.io.InputStreamReader; |
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import java.io.LineNumberReader; |
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import java.io.Reader; |
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import java.nio.charset.Charset; |
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import java.nio.charset.StandardCharsets; |
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import java.util.ArrayList; |
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import java.util.Collections; |
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import java.util.List; |
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import lombok.extern.slf4j.Slf4j; |
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import org.springframework.core.io.ClassPathResource; |
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import org.springframework.core.io.Resource; |
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@Slf4j |
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public class ClasspathSqlScriptParser implements SqlScriptParser { |
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private final String sqlScriptPath; |
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private final Charset charset; |
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public ClasspathSqlScriptParser(String sqlScriptPath) { |
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this.sqlScriptPath = sqlScriptPath; |
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this.charset = StandardCharsets.UTF_8; |
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} |
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@Override |
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public List<String> getAllSql() throws IOException { |
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Resource sqlScriptResource = new ClassPathResource(sqlScriptPath); |
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if (!sqlScriptResource.exists()) { |
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log.warn("The sql script file {} doesn't exist", sqlScriptPath); |
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return Collections.emptyList(); |
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} |
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List<String> result = new ArrayList<>(); |
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try ( |
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InputStream inputStream = sqlScriptResource.getInputStream(); |
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Reader sqlScriptReader = new InputStreamReader(inputStream, charset); |
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LineNumberReader lineNumberReader = new LineNumberReader(sqlScriptReader)) { |
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String sql; |
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do { |
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sql = parseNextSql(lineNumberReader); |
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if (StringUtils.isNotBlank(sql)) { |
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result.add(sql); |
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} |
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} while (StringUtils.isNotBlank(sql)); |
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} |
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return result; |
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} |
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private String parseNextSql(LineNumberReader lineNumberReader) throws IOException { |
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String line; |
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while ((line = lineNumberReader.readLine()) != null) { |
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String trimLine = line.trim(); |
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if (StringUtils.isEmpty(trimLine) || isComment(trimLine)) { |
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// Skip the empty line, comment line |
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continue; |
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} |
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if (trimLine.startsWith("/*")) { |
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skipLicenseHeader(lineNumberReader); |
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continue; |
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} |
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if (trimLine.startsWith("delimiter")) { |
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// begin to parse processor, until delimiter ; |
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String[] split = trimLine.split(" "); |
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return parseProcedure(lineNumberReader, split[1]); |
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} |
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// begin to parse sql until; |
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List<String> sqlLines = new ArrayList<>(); |
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sqlLines.add(line); |
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while (!line.endsWith(";")) { |
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line = lineNumberReader.readLine(); |
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if (line == null) { |
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break; |
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} |
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if (StringUtils.isBlank(line)) { |
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continue; |
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} |
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sqlLines.add(line); |
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} |
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return String.join("\n", sqlLines); |
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} |
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return null; |
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} |
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private void skipLicenseHeader(LineNumberReader lineNumberReader) throws IOException { |
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String line; |
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while ((line = lineNumberReader.readLine()) != null) { |
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String trimLine = line.trim(); |
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if (StringUtils.isEmpty(trimLine) || isComment(trimLine)) { |
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// Skip the empty line, comment line |
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continue; |
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} |
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if (line.startsWith("*/")) { |
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break; |
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} |
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} |
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} |
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private String parseProcedure(LineNumberReader lineNumberReader, String delimiter) throws IOException { |
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List<String> sqlLines = new ArrayList<>(); |
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// begin to parse processor, until delimiter ; |
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String line; |
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while (true) { |
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line = lineNumberReader.readLine(); |
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if (line == null) { |
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break; |
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} |
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if (StringUtils.isBlank(line)) { |
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continue; |
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} |
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if (line.startsWith(delimiter)) { |
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break; |
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} |
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sqlLines.add(line); |
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} |
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return String.join("\n", sqlLines); |
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} |
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private boolean isComment(String line) { |
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return line.startsWith("--") || line.startsWith("//"); |
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} |
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}
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