Reconstruct rewriting module

[tristaZero]

Reconstruct rewriting module
The tasks of parsing module:

• Make all of the tokens store startIndex parameter and stopIndex parameter.
• Remove the invalid parameters for calculating the stopIndex.
• Add different interface to distinguish the SQLTokens for startIndex and stopIndex.

The tasks of rewriteEngine module:

• Use startIndex and stopIndex to rewrite SQLs.
• Make all of the tokens rewritten in the consistent method.
• Generate placeHolders to handle ItemsToken, LimitRowCountToken and so on.
• Delete getLogicTableName() from ShardingPlaceholder.
• Move encrypting processing part to ShardingEncryptorEngine.
• Use pattern() to create constant placeHolders, variant placeHolders, original literal from SQLTokens.
• Add interface for variant placeHolders to toString(parameters).
• Use pattern() to make constant placeHolders become literals, and create SQLBuilder to store placeHolder-literals, variant placeHolders and original literals.
• Use generateSQL() to generate SQLUnit.

The tasks of SQLBuilder module:

• Store variant placeHolders and placeHolder-literals and original literals.
• Use toSQL() to generate SQLUnit.

[terrymanu]

Some code review suggestion:

• XXXSQLRewriteEngine move to new package name as engine
• XXXSQLRewriteEngine need implement a interface name as SQLRewriteEngine
• MasterSlaveSQLRewriteEngine use @requiredargsconstructor
• Constructor don't need java-doc
• Don't use @SuppressWarnings("all") on class EncryptUpdateItemColumnPlaceholder
• EncryptUpdateItemColumnPlaceholder has lots of field can be null, consider about the design, maybe split assistedColumn and not has assistedColumn situation
• Question in EncryptWhereColumnPlaceholder, between should not supported
• Should not call SQLUtil.getExactlyValue on rewrite module, current value should come from parse module. For example: IndexPlaceholder

[terrymanu]

Some suggestions:

1. Remove SQLRewriteEngine.originalSQL, use sqlStatement.getLogicSQL()
2. For EncryptRule with SQLRewriteEngine, use current DatabaseType instead of DatabaseType.MySQL
3. SQLRewriteEngine.isRewriteDistinctLiteral => isMeedRewriteDistinctLiteral
4. SQLRewriteEngine.isContainsAggregationDistinctToken can move to sqlStatement, and let token type as an input parameter
5. SelectStatement.getFirstSelectItemStartIndex() should as a Token and Split append distinct from rewriteInitialLiteral
6. Make sure responsibility of rewriter and engine, only rewriter can use token
7. EncryptSQLRewriter & ShardingSQLRewriter can new instance out of loop
8. Make unify with stopPosition & stopIndex
9. sqlBuilder is global field with SQLRewriteEngine, may avoid pass from private method by input parameter
10. Make accurate with javadoc on SQLRewriter.rewrite
11. Avoid start a new line if not exceed 200 char one line, at line 107 on EncryptSQLRewriter
12. Make input parameter as same sequence for differnet methods, like: EncryptSQLRewriter.encryptInsertOptimizeResultUnit and EncryptSQLRewriter.encryptInsertOptimizeResult's param: unit
13. add Predicate if Optional can not be absent, at line 105 on EncryptSQLRewriter
14. InsertParameterUnit => InsertParameterGroup?
15. Decouple SQLBuilder & ParameterBuilder
16. Remove SchemaPlaceholder and test cases
17. Add new method appendPlaceholder for SQLToken and polymorphic appendXXXPlaceholder

[tristaZero]

Some suggestions:

• Remove SQLRewriteEngine.originalSQL, use sqlStatement.getLogicSQL()
• For EncryptRule with SQLRewriteEngine, use current DatabaseType instead of DatabaseType.MySQL
• SQLRewriteEngine.isRewriteDistinctLiteral => isMeedRewriteDistinctLiteral
• SQLRewriteEngine.isContainsAggregationDistinctToken can move to sqlStatement, and let token type as an input parameter
• SelectStatement.getFirstSelectItemStartIndex() should as a Token and Split append distinct from rewriteInitialLiteral
• Make sure responsibility of rewriter and engine, only rewriter can use token
• EncryptSQLRewriter & ShardingSQLRewriter can new instance out of loop
• Make unify with stopPosition & stopIndex
• sqlBuilder is global field with SQLRewriteEngine, may avoid pass from private method by input parameter
• Make accurate with javadoc on SQLRewriter.rewrite
• Avoid start a new line if not exceed 200 char one line, at line 107 on EncryptSQLRewriter
• Make input parameter as same sequence for differnet methods, like: EncryptSQLRewriter.encryptInsertOptimizeResultUnit and EncryptSQLRewriter.encryptInsertOptimizeResult's param: unit add Predicate if Optional can not be absent, at line 105 on EncryptSQLRewriter
• InsertParameterUnit => InsertParameterGroup?
• Decouple SQLBuilder & ParameterBuilder
• Remove SchemaPlaceholder and test cases
• Add new method appendPlaceholder for SQLToken and polymorphic appendXXXPlaceholder