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## 内容1
### 文件路径：
dashbuilder-backend/dashbuilder-dataset-sql/src/main/java/org/dashbuilder/dataprovider/sql/dialect/DefaultDialect.java
### 代码内容：
package org.dashbuilder.dataprovider.sql.dialect;

import java.lang.reflect.InvocationTargetException;
import java.lang.reflect.Method;
import java.text.SimpleDateFormat;
import java.util.ArrayList;
import java.util.Collection;
import java.util.Date;
import java.util.List;

import org.apache.commons.lang3.StringUtils;
import org.dashbuilder.dataprovider.sql.model.Column;
import org.dashbuilder.dataprovider.sql.model.Condition;
import org.dashbuilder.dataprovider.sql.model.CoreCondition;
import org.dashbuilder.dataprovider.sql.model.CreateTable;
import org.dashbuilder.dataprovider.sql.model.Delete;
import org.dashbuilder.dataprovider.sql.model.DynamicDateColumn;
import org.dashbuilder.dataprovider.sql.model.FixedDateColumn;
import org.dashbuilder.dataprovider.sql.model.FunctionColumn;
import org.dashbuilder.dataprovider.sql.model.Insert;
import org.dashbuilder.dataprovider.sql.model.LogicalCondition;
import org.dashbuilder.dataprovider.sql.model.SQLStatement;
import org.dashbuilder.dataprovider.sql.model.Select;
import org.dashbuilder.dataprovider.sql.model.SimpleColumn;
import org.dashbuilder.dataprovider.sql.model.SortColumn;
import org.dashbuilder.dataprovider.sql.model.Table;
import org.dashbuilder.dataset.ColumnType;
import org.dashbuilder.dataset.filter.CoreFunctionType;
import org.dashbuilder.dataset.filter.LogicalExprType;
import org.dashbuilder.dataset.group.AggregateFunctionType;
import org.dashbuilder.dataset.group.DateIntervalType;
import org.dashbuilder.dataset.sort.SortOrder;

import static org.dashbuilder.dataprovider.sql.SQLFactory.*;

public class DefaultDialect implements Dialect {

    private static final String AND = " AND ";

    @Override
    public String[] getExcludedColumns() {
        return new String[] {};
    }

    @Override
    public String getColumnSQL(Column column) {

        if (column instanceof FunctionColumn) {
            return getFunctionColumnSQL((FunctionColumn) column);
        }
        else if (column instanceof SortColumn) {
            return getSortColumnSQL((SortColumn) column);
        }
        else if (column instanceof DynamicDateColumn) {
            return getDynamicDateColumnSQL((DynamicDateColumn) column);
        }
        else if (column instanceof FixedDateColumn) {
            return getFixedDateColumnSQL((FixedDateColumn) column);
        }
        else if (column instanceof SimpleColumn) {
            return getSimpleColumnSQL((SimpleColumn) column);
        }
        else {
            return getColumnNameSQL(column.getName());
        }
    }

    @Override
    public String getColumnTypeSQL(Column column) {
        switch (column.getType()) {
            case NUMBER: {
                return "NUMERIC(28,2)";
            }
            case DATE: {
                return "TIMESTAMP";
            }
            default: {
                return "VARCHAR(" + column.getLength() + ")";
            }
        }
    }

    @Override
    public String convertToString(Object value) {
        try {
            return value == null ? null : (String) value;
        } catch (ClassCastException e) {
            return value.toString();
        }
    }

    @Override
    public Double convertToDouble(Object value) {
        try {
            return value == null ? null : ((Number) value).doubleValue();
        } catch (ClassCastException e) {
            return Double.parseDouble(value.toString());
        }
    }

    @Override
    public Date convertToDate(Object value) {
        try {
            return value == null ? null : (Date) value;
        } catch (ClassCastException e) {
            throw new IllegalArgumentException("Not a java.util.Date: " + value + " (" + value.getClass().getName() + ")");
        }
    }

    @Override
    public String getTableSQL(SQLStatement<?> stmt) {
        Table table = stmt.getTable();
        String name = getTableNameSQL(table.getName());
        if (StringUtils.isBlank(table.getSchema())) {
            return name;
        } else{
            return getSchemaNameSQL(table.getSchema()) + "." + name;
        }
    }

    @Override
    public String getTableNameSQL(String name) {
        return name;
    }

    @Override
    public String getSchemaNameSQL(String name) {
        return name;
    }

    @Override
    public String getSimpleColumnSQL(SimpleColumn column) {
        String result = getColumnNameSQL(column.getName());
        if (column.getFunctionType() != null) {
            result = getColumnFunctionSQL(result, column.getFunctionType());
        }
        return result;
    }

    @Override
    public String getFunctionColumnSQL(FunctionColumn column) {
        if (FunctionColumn.LOWER.equals(column.getFunction())) {
            return getLowerFunctionSQL(column.getColumns()[0]);
        }
        if (FunctionColumn.CONCAT.equals(column.getFunction())) {
            return getConcatFunctionSQL(column.getColumns());
        }
        if (FunctionColumn.YEAR.equals(column.getFunction())) {
            return getDatePartFunctionSQL("YEAR", column.getColumns()[0]);
        }
        if (FunctionColumn.MONTH.equals(column.getFunction())) {
            return getDatePartFunctionSQL("MONTH", column.getColumns()[0]);
        }
        if (FunctionColumn.DAY.equals(column.getFunction())) {
            return getDatePartFunctionSQL("DAY", column.getColumns()[0]);
        }
        if (FunctionColumn.HOUR.equals(column.getFunction())) {
            return getDatePartFunctionSQL("HOUR", column.getColumns()[0]);
        }
        if (FunctionColumn.MINUTE.equals(column.getFunction())) {
            return getDatePartFunctionSQL("MINUTE", column.getColumns()[0]);
        }
        if (FunctionColumn.SECOND.equals(column.getFunction())) {
            return getDatePartFunctionSQL("SECOND", column.getColumns()[0]);
        }
        throw new IllegalArgumentException("Column function not supported: " + column.getFunction());
    }

    @Override
    public String getLowerFunctionSQL(Column column) {
        String columnSQL = getColumnSQL(column);
        return "LOWER(" + columnSQL + ")";
    }

    @Override
    public String getConcatFunctionSQL(Column[] columns) {
        return getConcatFunctionSQL(columns, "(", ")", " || ");
    }

    public String getConcatFunctionSQL(Column[] columns, String begin, String end, String separator) {
        StringBuilder out = new StringBuilder();
        out.append(begin);
        for (int i = 0; i < columns.length; i++) {
            if (i > 0) out.append(separator);
            Column column = columns[i];
            ColumnType type = column.getType();
            if (ColumnType.LABEL.equals(type) || ColumnType.TEXT.equals(type)) {
                out.append("'").append(column.getName()).append("'");
            } else {
                // Cast needed
                out.append(getColumnCastSQL(column));
            }
        }
        out.append(end);
        return out.toString();
    }

    public String getColumnCastSQL(Column column) {
        String columnSQL = getColumnSQL(column);
        return "CAST(" + columnSQL + " AS VARCHAR)";
    }

    @Override
    public String getDatePartFunctionSQL(String part, Column column) {
        String columnSQL = getColumnSQL(column);
        return "EXTRACT(" + part + " FROM " + columnSQL + ")";
    }

    @Override
    public String getSortColumnSQL(SortColumn sortColumn) {

        Column column = sortColumn.getSource();
        String columnSQL = getColumnSQL(column);

        // Always order by the alias (if any)
        if (!StringUtils.isBlank(column.getAlias())) {
            columnSQL = getAliasForStatementSQL(column.getAlias());
        }
        return columnSQL + " " + getSortOrderSQL(sortColumn.getOrder());
    }

    @Override
    public String getSortOrderSQL(SortOrder order) {
        if (SortOrder.ASCENDING.equals(order)) {
            return "ASC";
        }
        if (SortOrder.DESCENDING.equals(order)) {
            return "DESC";
        }
        throw new IllegalArgumentException("Sort order not supported: " + order);
    }

    /**
     * The text conversion of a date column is very DB specific.
     * A mechanism combining  concat and extract functions is used by default.
     * Depending on the DB dialect a more polished approach can be used.
     * For instance,

     *
In Oracle and Postgres the 'to_char' function is used.

     *
In Mysql, 'date_format'

     *
In H2, the 'to_char' function is not used as it's only available since version 1.3.175 and we do need to support older versions.

     *

     */
    @Override
    public String getDynamicDateColumnSQL(DynamicDateColumn column) {
        Column dateColumn = toChar(column);
        return getColumnSQL(dateColumn);
    }

    public Column toChar(DynamicDateColumn column) {
        Column target = column(column.getName());
        DateIntervalType type = column.getDateType();
        Column SEPARATOR_DATE = column("-", ColumnType.TEXT, 3);
        Column SEPARATOR_EMPTY = column(" ", ColumnType.TEXT, 3);
        Column SEPARATOR_TIME = column(":", ColumnType.TEXT, 3);

        if (DateIntervalType.SECOND.equals(type)) {
            return concat(target.year(), SEPARATOR_DATE,
                    target.month(), SEPARATOR_DATE,
                    target.day(), SEPARATOR_EMPTY,
                    target.hour(), SEPARATOR_TIME,
                    target.minute(), SEPARATOR_TIME,
                    target.second());
        }
        if (DateIntervalType.MINUTE.equals(type)) {
            return concat(target.year(), SEPARATOR_DATE,
                    target.month(), SEPARATOR_DATE,
                    target.day(), SEPARATOR_EMPTY,
                    target.hour(), SEPARATOR_TIME,
                    target.minute());
        }
        if (DateIntervalType.HOUR.equals(type)) {
            return concat(target.year(), SEPARATOR_DATE,
                    target.month(), SEPARATOR_DATE,
                    target.day(), SEPARATOR_EMPTY,
                    target.hour());
        }
        if (DateIntervalType.DAY.equals(type) || DateIntervalType.WEEK.equals(type)) {
            return concat(target.year(), SEPARATOR_DATE,
                    target.month(), SEPARATOR_DATE,
                    target.day());
        }
        if (DateIntervalType.MONTH.equals(type)
                || DateIntervalType.QUARTER.equals(type)) {

            return concat(target.year(), SEPARATOR_DATE,
                    target.month());
        }
        if (DateIntervalType.YEAR.equals(type)
                || DateIntervalType.DECADE.equals(type)
                || DateIntervalType.CENTURY.equals(type)
                || DateIntervalType.MILLENIUM.equals(type)) {

            return target.year();
        }
        throw new IllegalArgumentException("Group '" + target.getName() +
                "' by the given date interval type is not supported: " + type);
    }

    @Override
    public String getFixedDateColumnSQL(FixedDateColumn column) {
        Column target = column(column.getName());
        DateIntervalType type = column.getDateType();
        if (DateIntervalType.SECOND.equals(type)) {
            return getColumnSQL(target.second());
        }
        if (DateIntervalType.MINUTE.equals(type)) {
            return getColumnSQL(target.minute());
        }
        if (DateIntervalType.HOUR.equals(type)) {
            return getColumnSQL(target.hour());
        }
        if (DateIntervalType.DAY_OF_WEEK.equals(type)) {
            return getColumnSQL(target.day());
        }
        if (DateIntervalType.MONTH.equals(type)) {
            return getColumnSQL(target.month());
        }
        if (DateIntervalType.QUARTER.equals(type)) {
            // Emulated using month and converted to quarter during the data set post-processing
            return getColumnSQL(target.month());
        }
        throw new IllegalArgumentException("Interval size '" + type + "' not supported for " +
                "fixed date intervals. The only supported sizes are: " +
                StringUtils.join(DateIntervalType.FIXED_INTERVALS_SUPPORTED, ","));
    }

    @Override
    public String getColumnNameSQL(String name) {
        return name;
    }

    @Override
    public String getColumnNameQuotedSQL(String name) {
        return "\"" + name + "\"";
    }

    @Override
    public String getAliasForColumnSQL(String alias) {
        return "\"" + alias + "\"";
    }

    @Override
    public String getAliasForStatementSQL(String alias) {
        return "\"" + alias + "\"";
    }

    @Override
    public String getConditionSQL(Condition condition) {
        if (condition instanceof CoreCondition) {
            return getCoreConditionSQL((CoreCondition) condition);
        }
        if (condition instanceof LogicalCondition) {
            return getLogicalConditionSQL((LogicalCondition) condition);
        }
        throw new IllegalArgumentException("Condition type not supported: " + condition);
    }

    @Override
    public String getCoreConditionSQL(CoreCondition condition) {
        String columnSQL = getColumnSQL(condition.getColumn());
        CoreFunctionType type = condition.getFunction();
        Object[] params = condition.getParameters();
        if (CoreFunctionType.IS_NULL.equals(type)) {
            return getIsNullConditionSQL(columnSQL);
        }
        if (CoreFunctionType.NOT_NULL.equals(type)) {
            return getNotNullConditionSQL(columnSQL);
        }
        if (CoreFunctionType.EQUALS_TO.equals(type)) {
            return getIsEqualsToConditionSQL(columnSQL, params[0]);
        }
        if (CoreFunctionType.NOT_EQUALS_TO.equals(type)) {
            return getNotEqualsToConditionSQL(columnSQL, params[0]);
        }
        if (CoreFunctionType.NOT_EQUALS_TO.equals(type)) {
            return getNotEqualsToConditionSQL(columnSQL, params[0]);
        }
        if (CoreFunctionType.LIKE_TO.equals(type)) {
            return getLikeToConditionSQL(columnSQL, params[0]);
        }
        if (CoreFunctionType.GREATER_THAN.equals(type)) {
            return getGreaterThanConditionSQL(columnSQL, params[0]);
        }
        if (CoreFunctionType.GREATER_OR_EQUALS_TO.equals(type)) {
            return getGreaterOrEqualsConditionSQL(columnSQL, params[0]);
        }
        if (CoreFunctionType.LOWER_THAN.equals(type)) {
            return getLowerThanConditionSQL(columnSQL, params[0]);
        }
        if (CoreFunctionType.LOWER_OR_EQUALS_TO.equals(type)) {
            return getLowerOrEqualsConditionSQL(columnSQL, params[0]);
        }
        if (CoreFunctionType.BETWEEN.equals(type)) {
            return getBetweenConditionSQL(columnSQL, params[0], params[1]);
        }
        if (CoreFunctionType.IN.equals(type)) {
            return getInConditionSQL(columnSQL, params[0]);
        }
        if (CoreFunctionType.NOT_IN.equals(type)) {
            return getNotInConditionSQL(columnSQL, params[0]);
        }

        throw new IllegalArgumentException("Core condition type not supported: " + type);
    }

    @Override
    public String getNotNullConditionSQL(String column) {
        return column + " IS NOT NULL";
    }

    @Override
    public String getIsNullConditionSQL(String column) {
        return column + " IS NULL";
    }

    @Override
    public String getIsEqualsToConditionSQL(String column, Object param) {
        if (param == null) {
            return getIsNullConditionSQL(column);
        } else {
            String paramStr = getParameterSQL(param);
            return column + " = " + paramStr;
        }
    }

    @Override
    public String getNotEqualsToConditionSQL(String column, Object param) {
        if (param == null) {
            return getNotNullConditionSQL(column);
        } else {
            String paramStr = getParameterSQL(param);
            return column + " <> " + paramStr;
        }
    }

    @Override
    public String getLikeToConditionSQL(String column, Object param) {
        String paramStr = getParameterSQL(param);
        return column + " LIKE " + paramStr;
    }

    @Override
    public String getGreaterThanConditionSQL(String column, Object param) {
        String paramStr = getParameterSQL(param);
        return column + " > " + paramStr;
    }

    @Override
    public String getGreaterOrEqualsConditionSQL(String column, Object param) {
        String paramStr = getParameterSQL(param);
        return column + " >= " + paramStr;
    }

    @Override
    public String getLowerThanConditionSQL(String column, Object param) {
        String paramStr = getParameterSQL(param);
        return column + " < " + paramStr;
    }

    @Override
    public String getLowerOrEqualsConditionSQL(String column, Object param) {
        String paramStr = getParameterSQL(param);
        return column + " <= " + paramStr;
    }

    @Override
    public String getBetweenConditionSQL(String column, Object from, Object to) {
        String fromStr = getParameterSQL(from);
        String toStr = getParameterSQL(to);
        return column + " BETWEEN " + fromStr + AND + toStr;
    }

    @Override
    public String getInConditionSQL(String column, Object param) {
        StringBuilder inStatement = new StringBuilder();
        inStatement.append(column);
        inStatement.append(" IN (");

        for (Object p : (Collection<?>) param) {

            inStatement.append(getParameterSQL(p) + ",");
        }
        inStatement.deleteCharAt(inStatement.length()-1);
        inStatement.append(")");
        return inStatement.toString();
    }

    @Override
    public String getNotInConditionSQL(String column, Object param) {
        StringBuilder inStatement = new StringBuilder();
        inStatement.append(column);
        inStatement.append(" NOT IN (");

        for (Object p : (Collection<?>) param) {

            inStatement.append(getParameterSQL(p) + ",");
        }
        inStatement.deleteCharAt(inStatement.length()-1);
        inStatement.append(")");
        return inStatement.toString();
    }

    @Override
    public String getParameterSQL(Object param) {
        if (param == null) {
            return "null";
        }
        if (param instanceof Number) {
            return getNumberParameterSQL((Number) param);
        }
        if (param instanceof Date) {
            return getDateParameterSQL((Date) param);
        }
        return getStringParameterSQL(param.toString());
    }

    @Override
    public String getNumberParameterSQL(Number param) {
        return param.toString();
    }

    SimpleDateFormat dateFormat = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss.S");

    @Override
    public String getDateParameterSQL(Date param) {
        // timestamp '2015-08-24 13:14:36.615'
        return "TIMESTAMP '" + dateFormat.format(param) + "'";
    }

    @Override
    public String getStringParameterSQL(String param) {
        return "'" + param + "'";
    }

    @Override
    public String getLogicalConditionSQL(LogicalCondition condition) {
        LogicalExprType type = condition.getType();
        Condition[] conditions = condition.getConditions();
        if (LogicalExprType.NOT.equals(type)) {
            return getNotExprConditionSQL(conditions[0]);
        }
        if (LogicalExprType.AND.equals(type)) {
            return getAndExprConditionSQL(conditions);
        }
        if (LogicalExprType.OR.equals(type)) {
            return getOrExprConditionSQL(conditions);
        }
        throw new IllegalArgumentException("Logical condition type not supported: " + type);
    }

    @Override
    public String getNotExprConditionSQL(Condition condition) {
        String conditionSQL = getConditionSQL(condition);
        return "NOT(" + conditionSQL + ")";
    }

    @Override
    public String getAndExprConditionSQL(Condition[] conditions) {
        return _getLogicalExprConditionSQL(conditions, "AND");
    }

    @Override
    public String getOrExprConditionSQL(Condition[] conditions) {
        return _getLogicalExprConditionSQL(conditions, "OR");
    }

    protected String _getLogicalExprConditionSQL(Condition[] conditions, String op) {
        StringBuilder out = new StringBuilder();
        out.append("(");
        for (int i = 0; i < conditions.length; i++) {
            Condition condition = conditions[i];
            String conditionSQL = getConditionSQL(condition);
            if (i > 0) {
                out.append(" ").append(op).append(" ");
            }
            out.append(conditionSQL);
        }
        out.append(")");
        return out.toString();
    }

    @Override
    public String getColumnFunctionSQL(String column, AggregateFunctionType function) {
        switch (function) {
            case SUM: {
                return "SUM(" + column + ")";
            }
            case MAX: {
                return "MAX(" + column + ")";
            }
            case MIN: {
                return "MIN(" + column + ")";
            }
            case AVERAGE: {
                return "AVG(" + column + ")";
            }
            case COUNT: {
                return "COUNT(" + column + ")";
            }
            case DISTINCT: {
                return "COUNT(DISTINCT " + column + ")";
            }
            default: {
                throw new IllegalArgumentException("Function type not valid: " + function);
            }
        }
    }

    @Override
    public String getCountQuerySQL(Select select) {
        List<SortColumn> sortColumns = new ArrayList<SortColumn>();
        sortColumns.addAll(select.getOrderBys());
        try {
            // Remove ORDER BY for better performance
            select.getOrderBys().clear();
            return "SELECT "
                    + getColumnFunctionSQL("*", AggregateFunctionType.COUNT)
                    + " FROM (" + select.getSQL() + ") "
                    + getAliasForColumnSQL("dbSQL");
        } finally {
            select.orderBy(sortColumns);
        }
    }

    @Override
    public String getSQL(CreateTable create) {
        StringBuilder sql = new StringBuilder("CREATE TABLE ");
        List<String> pkeys = new ArrayList<String>();
        String tname = getTableSQL(create);
        sql.append(tname);

        // Columns
        boolean first = true;
        sql.append(" (\n");
        for (Column column : create.getColumns()) {
            if (!first) {
                sql.append(",\n");
            }
            String name = getColumnNameSQL(column.getName());
            String type = getColumnTypeSQL(column);
            sql.append(" ").append(name).append(" ").append(type);
            if (create.getPrimaryKeys().contains(column)) {
                sql.append(" NOT NULL");
                pkeys.add(name);
            }
            first = false;
        }
        if (!create.getPrimaryKeys().isEmpty()) {
            sql.append(",\n");
            sql.append(" PRIMARY KEY(");
            sql.append(StringUtils.join(pkeys, ","));
            sql.append(")\n");
        }
        sql.append(")");
        return sql.toString();
    }

    @Override
    public String getSQL(Select select) {
        // Select clause
        StringBuilder sql = new StringBuilder();
        String selectClause = getSelectSQL(select);
        sql.append(selectClause);

        // From clause (inner SQL or table)
        sql.append(" ").append(getFromSQL(select));

        // Where clauses
        List<Condition> wheres = select.getWheres();
        if (!wheres.isEmpty()) {
            sql.append(" ").append(getWhereSQL(select));
        }

        // Group by
        List<Column> groupBys = select.getGroupBys();
        if (!groupBys.isEmpty()) {
            sql.append(" ").append(getGroupBySQL(select));
        }

        // Order by
        List<SortColumn> orderBys = select.getOrderBys();
        if (!orderBys.isEmpty()) {
            sql.append(" ").append(getOrderBySQL(select));
        }

        // Limits
        int limit = select.getLimit();
        int offset = select.getOffset();
        if (limit > 0 || offset > 0) {
            String limitSql = getOffsetLimitSQL(select);
            if (!StringUtils.isBlank(limitSql)) {
                sql.append(limitSql);
            }
        }
        return sql.toString();
    }

    @Override
    public String getSQL(Insert insert) {
        // Insert clause
        StringBuilder sql = new StringBuilder();
        String insertClause = getInsertStatement(insert);
        sql.append(insertClause);

        // Table
        sql.append(" ").append(getTableSQL(insert));

        // Columns
        boolean first = true;
        sql.append(" (");
        for (Column column : insert.getColumns()) {
            if (!first) {
                sql.append(",");
            }
            String str = getColumnSQL(column);
            sql.append(str);
            first = false;
        }
        sql.append(")");

        // Values
        first = true;
        sql.append(" VALUES (");
        for (Object value : insert.getValues()) {
            if (!first) {
                sql.append(",");
            }
            String str = getParameterSQL(value);
            sql.append(str);
            first = false;
        }
        sql.append(")");
        return sql.toString();
    }

    @Override
    public String getSQL(Delete delete) {
        // Delete clause
        StringBuilder sql = new StringBuilder();
        String deleteClause = getDeleteStatement(delete);
        sql.append(deleteClause);

        // From clause
        sql.append(" ").append(getTableSQL(delete));

        // Where clauses
        List<Condition> wheres = delete.getWheres();
        if (!wheres.isEmpty()) {
            sql.append(" ").append(getWhereSQL(delete));
        }

        return sql.toString();
    }

    @Override
    public String getSelectSQL(Select select) {
        StringBuilder clause = new StringBuilder();
        clause.append(getSelectStatement(select));

        clause.append(" ");
        if (select.getColumns().isEmpty()) {
            clause.append("*");
        } else {
            boolean first = true;
            for (Column column : select.getColumns()) {
                if (!first) {
                    clause.append(", ");
                }
                String str = getColumnSQL(column);
                boolean aliasNonEmpty = !StringUtils.isBlank(column.getAlias());
                boolean isSimpleColumn = (column instanceof SimpleColumn) && !str.equals(getColumnNameSQL(column.getAlias()));

                if (aliasNonEmpty && (allowAliasInStatements() || isSimpleColumn)) {
                    str += " " + getAliasForColumnSQL(column.getAlias());
                }
                clause.append(str);
                first = false;
            }
        }
        return clause.toString();
    }

    @Override
    public String getFromSQL(Select select) {
        String fromSelect = select.getFromSelect();
        Table fromTable = select.getFromTable();
        String from = getFromStatement(select);

        if (fromSelect != null) {
            String alias = getAliasForColumnSQL("dbSQL");
            return from  + " (" + fromSelect + ") " + alias;
        }
        else if (fromTable != null ){
            String table = getTableSQL(select);
            return from + " " + table;
        }
        return "";
    }

    @Override
    public String getWhereSQL(Select select) {
        StringBuilder sql = new StringBuilder();
        List<Condition> wheres = select.getWheres();
        boolean first = true;
        for (Condition condition : wheres) {
            if (first) {
                sql.append(getWhereStatement(select)).append(" ");
            } else {
                sql.append(AND);
            }
            String str = getConditionSQL(condition);
            sql.append(str);
            first = false;
        }
        return sql.toString();
    }

    @Override
    public String getWhereSQL(Delete delete) {
        StringBuilder sql = new StringBuilder();
        List<Condition> wheres = delete.getWheres();
        boolean first = true;
        for (Condition condition : wheres) {
            if (first) {
                sql.append(getWhereStatement(delete)).append(" ");
            } else {
                sql.append(AND);
            }
            String str = getConditionSQL(condition);
            sql.append(str);
            first = false;
        }
        return sql.toString();
    }

    @Override
    public String getGroupBySQL(Select select) {
        StringBuilder sql = new StringBuilder();
        List<Column> groupBys = select.getGroupBys();
        boolean first = true;
        for (Column column : groupBys) {
            if (first) {
                sql.append(getGroupByStatement(select)).append(" ");
            } else {
                sql.append(", ");
            }
            Column aliasColumn = allowAliasInStatements() ? getAliasStatement(select, column) : null;
            sql.append(aliasColumn != null ? getAliasForStatementSQL(aliasColumn.getAlias()) : getColumnSQL(column));
            first = false;
        }
        return sql.toString();
    }

    @Override
    public String getOrderBySQL(Select select) {
        StringBuilder sql = new StringBuilder();
        List<SortColumn> orderBys = select.getOrderBys();
        boolean first = true;
        for (SortColumn column : orderBys) {
            if (first) {
                sql.append(getOrderByStatement(select)).append(" ");
            } else {
                sql.append(", ");
            }
            Column aliasColumn = allowAliasInStatements() ? getAliasStatement(select, column.getSource()) : null;
            if (aliasColumn != null) {
                column = new SortColumn(aliasColumn, column.getOrder());
            }
            String str = getSortColumnSQL(column);
            sql.append(str);
            first = false;
        }
        return sql.toString();
    }

    @Override
    public String getOffsetLimitSQL(Select select) {
        int offset = select.getOffset();
        int limit = select.getLimit();
        StringBuilder out = new StringBuilder();
        if (limit > 0) out.append(" LIMIT ").append(limit);
        if (offset > 0) out.append(" OFFSET ").append(offset);
        return out.toString();
    }

    @Override
    public String getSelectStatement(Select select) {
        return "SELECT";
    }

    @Override
    public String getInsertStatement(Insert insert) {
        return "INSERT INTO";
    }

    @Override
    public String getDeleteStatement(Delete delete) {
        return "DELETE FROM";
    }

    @Override
    public String getFromStatement(Select select) {
        return "FROM";
    }

    @Override
    public String getWhereStatement(Select select) {
        return "WHERE";
    }

    @Override
    public String getWhereStatement(Delete delete) {
        return "WHERE";
    }

    @Override
    public String getGroupByStatement(Select select) {
        return "GROUP BY";
    }

    @Override
    public String getOrderByStatement(Select select) {
        return "ORDER BY";
    }

    // Helper methods

    protected Object invokeMethod(Object o, String methodName, Object[] params) {
        Method methods[] = o.getClass().getMethods();
        for (int i = 0; i < methods.length; ++i) {
            if (methodName.equals(methods[i].getName())) {
                try {
                    methods[i].setAccessible(true);
                    return methods[i].invoke(o, params);
                }
                catch (IllegalAccessException ex) {
                    return null;
                }
                catch (InvocationTargetException ite) {
                    return null;
                }
            }
        }
        return null;
    }

    public boolean areEquals(Column column1, Column column2) {
        if (!column1.getName().equals(column2.getName())) {
            return false;
        }
        if (!column1.getClass().getName().equals(column2.getClass().getName())) {
            return false;
        }
        if (column1 instanceof DynamicDateColumn) {
            DynamicDateColumn dd1 = (DynamicDateColumn) column1;
            DynamicDateColumn dd2 = (DynamicDateColumn) column2;
            if (!dd1.getDateType().equals(dd2.getDateType())) {
                return false;
            }
        }
        if (column1 instanceof FixedDateColumn) {
            FixedDateColumn fd1 = (FixedDateColumn) column1;
            FixedDateColumn fd2 = (FixedDateColumn) column2;
            if (!fd1.getDateType().equals(fd2.getDateType())) {
                return false;
            }
        }
        return true;
    }

    public boolean allowAliasInStatements() {
        return false;
    }

    public Column getAliasStatement(Select select, Column target) {
        for (Column column : select.getColumns()) {
            if (!(column instanceof SimpleColumn) &&
                    !StringUtils.isBlank(column.getAlias()) &&
                    areEquals(column, target)) {

                return column;
            }
        }
        return null;
    }
}

Output:
【漏洞类型】SQL注入
【严重性】High
【漏洞摘要】原始代码在`getStringParameterSQL`方法中直接将用户输入的字符串参数拼接到SQL查询中，未进行任何转义或验证，这可能导致SQL注入攻击。具体来说，如果用户输入包含单引号（'），直接拼接会导致SQL语法错误或恶意SQL代码被执行。
【关键代码模式】
- `getStringParameterSQL`方法
- `SimpleDateFormat`类
- 用户输入参数的直接拼接
- 未进行SQL参数转义或验证的字符串处理
【修复方法说明】修复方法通过调用`replaceAll("'", "''")`对用户输入的字符串参数进行转义，确保单引号被正确处理，从而防止SQL注入攻击。最佳实践是使用参数化查询或预编译语句来处理用户输入的SQL参数。