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How to use SqlNullLiteralValue class of org.evomaster.dbconstraint.ast package

Best EvoMaster code snippet using org.evomaster.dbconstraint.ast.SqlNullLiteralValue

Source:SqlConditionTranslator.java

...15import org.evomaster.dbconstraint.ast.SqlIsNotNullCondition;16import org.evomaster.dbconstraint.ast.SqlIsNullCondition;17import org.evomaster.dbconstraint.ast.SqlLikeCondition;18import org.evomaster.dbconstraint.ast.SqlLiteralValue;19import org.evomaster.dbconstraint.ast.SqlNullLiteralValue;20import org.evomaster.dbconstraint.ast.SqlOrCondition;21import org.evomaster.dbconstraint.ast.SqlSimilarToCondition;22import org.evomaster.dbconstraint.ast.SqlStringLiteralValue;23import java.util.ArrayList;24import java.util.Collections;25import java.util.List;26import java.util.Set;27import java.util.stream.Collectors;28import static org.evomaster.dbconstraint.ast.SqlComparisonOperator.EQUALS_TO;29public class SqlConditionTranslator implements SqlConditionVisitor<TableConstraint, Void> {30    private static final String THIS_METHOD_SHOULD_NOT_BE_INVOKED = "This method should not be directly called";31    public static final String UNEXPECTED_COMPARISON_OPERATOR_MESSAGE = "Unexpected comparison operator ";32    private final TranslationContext translationContext;33    public SqlConditionTranslator(TranslationContext translationContext) {34        this.translationContext = translationContext;35    }36    /**37     * FIXME38     * temporary workaround before major refactoring.39     * Recall that Column.getTable() is not reliable40     */41    private String getTableName(SqlColumn column) {42        String tableName = column.getTableName();43        if (tableName != null) {44            return tableName;45        } else {46            return this.translationContext.getCurrentTableName();47        }48    }49    @Override50    public TableConstraint visit(SqlAndCondition andExpression, Void argument) {51        TableConstraint left = andExpression.getLeftExpr().accept(this, null);52        TableConstraint right = andExpression.getRightExpr().accept(this, null);53        return new AndConstraint(translationContext.getCurrentTableName(), left, right);54    }55    @Override56    public TableConstraint visit(SqlComparisonCondition e, Void argument) {57        SqlCondition left = e.getLeftOperand();58        SqlCondition right = e.getRightOperand();59        if (left instanceof SqlLiteralValue && right instanceof SqlColumn) {60            SqlLiteralValue leftLiteral = (SqlLiteralValue) left;61            SqlColumn rightColumn = (SqlColumn) right;62            return visit(leftLiteral, e, rightColumn);63        } else if (left instanceof SqlColumn && right instanceof SqlLiteralValue) {64            SqlColumn leftColumn = (SqlColumn) left;65            SqlLiteralValue rightLiteral = (SqlLiteralValue) right;66            return visit(leftColumn, e, rightLiteral);67        } else if (left instanceof SqlCondition && right instanceof SqlCondition) {68            TableConstraint leftTableConstraint = e.getLeftOperand().accept(this, null);69            TableConstraint rightTableConstraint = e.getRightOperand().accept(this, null);70            if (e.getSqlComparisonOperator().equals(EQUALS_TO)) {71                return new IffConstraint(translationContext.getCurrentTableName(), leftTableConstraint, rightTableConstraint);72            }73        }74        // TODO This translation should be implemented75        throw new SqlCannotBeTranslatedException(e.toSql() + " cannot be translated yet");76    }77    private TableConstraint visit(SqlColumn leftColumn, SqlComparisonCondition e, SqlLiteralValue rightLiteral) {78        final String tableName = getTableName(leftColumn);79        final String columnName = leftColumn.getColumnName();80        if (rightLiteral instanceof SqlBigIntegerLiteralValue) {81            long value = ((SqlBigIntegerLiteralValue) rightLiteral).getBigInteger().longValue();82            switch (e.getSqlComparisonOperator()) {83                case EQUALS_TO:84                    return new RangeConstraint(tableName, columnName, value, value);85                case GREATER_THAN:86                    return new LowerBoundConstraint(tableName, columnName, value + 1);87                case GREATER_THAN_OR_EQUAL:88                    return new LowerBoundConstraint(tableName, columnName, value);89                case LESS_THAN:90                    return new UpperBoundConstraint(tableName, columnName, value - 1);91                case LESS_THAN_OR_EQUAL:92                    return new UpperBoundConstraint(tableName, columnName, value);93                default:94                    throw new UnsupportedOperationException(UNEXPECTED_COMPARISON_OPERATOR_MESSAGE + e.getSqlComparisonOperator());95            }96        } else if (rightLiteral instanceof SqlStringLiteralValue) {97            SqlStringLiteralValue stringLiteralValue = (SqlStringLiteralValue) rightLiteral;98            if (e.getSqlComparisonOperator().equals(EQUALS_TO)) {99                return new EnumConstraint(tableName, columnName, Collections.singletonList(stringLiteralValue.getStringValue()));100            } else {101                throw new UnsupportedOperationException(UNEXPECTED_COMPARISON_OPERATOR_MESSAGE + e.getSqlComparisonOperator());102            }103        } else {104            throw new UnsupportedOperationException("Unsupported literal " + rightLiteral);105        }106    }107    private TableConstraint visit(SqlLiteralValue leftLiteral, SqlComparisonCondition e, SqlColumn rightColumn) {108        if (leftLiteral instanceof SqlBigIntegerLiteralValue) {109            long value = ((SqlBigIntegerLiteralValue) leftLiteral).getBigInteger().longValue();110            final String tableName = getTableName(rightColumn);111            final String columnName = rightColumn.getColumnName();112            switch (e.getSqlComparisonOperator()) {113                case EQUALS_TO:114                    return new RangeConstraint(tableName, columnName, value, value);115                case GREATER_THAN:116                    return new UpperBoundConstraint(tableName, columnName, value - 1);117                case GREATER_THAN_OR_EQUAL:118                    return new UpperBoundConstraint(tableName, columnName, value);119                case LESS_THAN:120                    return new LowerBoundConstraint(tableName, columnName, value + 1);121                case LESS_THAN_OR_EQUAL:122                    return new LowerBoundConstraint(tableName, columnName, value);123                default:124                    throw new UnsupportedOperationException(UNEXPECTED_COMPARISON_OPERATOR_MESSAGE + e.getSqlComparisonOperator());125            }126        } else {127            throw new UnsupportedOperationException("Unsupported literal " + e.getSqlComparisonOperator());128        }129    }130    @Override131    public TableConstraint visit(SqlInCondition inExpression, Void argument) {132        SqlColumn column = inExpression.getSqlColumn();133        String tableName = getTableName(column);134        String columnName = column.getColumnName();135        SqlConditionList rightItemsList = inExpression.getLiteralList();136        List<String> stringValues = new ArrayList<>();137        for (SqlCondition expressionValue : rightItemsList.getSqlConditionExpressions()) {138            final String stringValue;139            if (expressionValue instanceof SqlStringLiteralValue) {140                stringValue = new StringValue(expressionValue.toSql()).getNotExcapedValue();141            } else {142                stringValue = expressionValue.toSql();143            }144            stringValues.add(stringValue);145        }146        return new EnumConstraint(tableName, columnName, stringValues);147    }148    @Override149    public TableConstraint visit(SqlNullLiteralValue e, Void argument) {150        throw new UnsupportedOperationException(THIS_METHOD_SHOULD_NOT_BE_INVOKED);151    }152    @Override153    public TableConstraint visit(SqlStringLiteralValue e, Void argument) {154        throw new UnsupportedOperationException(THIS_METHOD_SHOULD_NOT_BE_INVOKED);155    }156    @Override157    public TableConstraint visit(SqlConditionList e, Void argument) {158        throw new UnsupportedOperationException(THIS_METHOD_SHOULD_NOT_BE_INVOKED);159    }160    @Override161    public TableConstraint visit(SqlIsNotNullCondition e, Void argument) {162        String tableName = getTableName(e.getColumn());163        String columnName = e.getColumn().getColumnName();...

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