| /* |
| * 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.geode.connectors.jdbc.internal; |
| |
| import java.util.Iterator; |
| import java.util.stream.Stream; |
| |
| class SqlStatementFactory { |
| private final String quote; |
| |
| public SqlStatementFactory(String identifierQuoteString) { |
| this.quote = identifierQuoteString; |
| } |
| |
| String createSelectQueryString(String quotedTablePath, EntryColumnData entryColumnData) { |
| return addKeyColumnsToQuery(entryColumnData, |
| new StringBuilder("SELECT * FROM ").append(quotedTablePath)); |
| } |
| |
| String createDestroySqlString(String quotedTablePath, EntryColumnData entryColumnData) { |
| return addKeyColumnsToQuery(entryColumnData, |
| new StringBuilder("DELETE FROM ").append(quotedTablePath)); |
| } |
| |
| private String addKeyColumnsToQuery(EntryColumnData entryColumnData, StringBuilder queryBuilder) { |
| queryBuilder.append(" WHERE "); |
| Iterator<ColumnData> iterator = entryColumnData.getEntryKeyColumnData().iterator(); |
| while (iterator.hasNext()) { |
| ColumnData keyColumn = iterator.next(); |
| boolean onLastColumn = !iterator.hasNext(); |
| queryBuilder.append(quote).append(keyColumn.getColumnName()).append(quote).append(" = ?"); |
| if (!onLastColumn) { |
| queryBuilder.append(" AND "); |
| } |
| } |
| return queryBuilder.toString(); |
| } |
| |
| String createUpdateSqlString(String quotedTablePath, EntryColumnData entryColumnData) { |
| StringBuilder query = new StringBuilder("UPDATE ") |
| .append(quotedTablePath) |
| .append(" SET "); |
| int idx = 0; |
| for (ColumnData column : entryColumnData.getEntryValueColumnData()) { |
| idx++; |
| if (idx > 1) { |
| query.append(", "); |
| } |
| query.append(quote).append(column.getColumnName()).append(quote); |
| query.append(" = ?"); |
| } |
| return addKeyColumnsToQuery(entryColumnData, query); |
| } |
| |
| String createInsertSqlString(String quotedTablePath, EntryColumnData entryColumnData) { |
| StringBuilder columnNames = new StringBuilder("INSERT INTO ") |
| .append(quotedTablePath) |
| .append(" ("); |
| StringBuilder columnValues = new StringBuilder(" VALUES ("); |
| addColumnDataToSqlString(entryColumnData, columnNames, columnValues); |
| columnNames.append(')'); |
| columnValues.append(')'); |
| return columnNames.append(columnValues).toString(); |
| } |
| |
| private void addColumnDataToSqlString(EntryColumnData entryColumnData, StringBuilder columnNames, |
| StringBuilder columnValues) { |
| Stream<ColumnData> values = entryColumnData.getEntryValueColumnData().stream(); |
| Stream<ColumnData> keys = entryColumnData.getEntryKeyColumnData().stream(); |
| Stream<ColumnData> columnDataStream = Stream.concat(values, keys); |
| final boolean[] firstTime = new boolean[] {true}; |
| columnDataStream.forEachOrdered(column -> { |
| if (!firstTime[0]) { |
| columnNames.append(','); |
| columnValues.append(','); |
| } else { |
| firstTime[0] = false; |
| } |
| columnNames.append(quote).append(column.getColumnName()).append(quote); |
| columnValues.append('?'); |
| }); |
| } |
| } |