org.springframework.r2dbc.connection.init

Class ScriptUtils

java.lang.Object

org.springframework.r2dbc.connection.init.ScriptUtils

public abstract class ScriptUtils
extends Object

Generic utility methods for working with SQL scripts.

Mainly for internal use within the framework.

Since:

5.3

Author:

Thomas Risberg, Sam Brannen, Juergen Hoeller, Keith Donald, Dave Syer, Chris Beams, Oliver Gierke, Chris Baldwin, Nicolas Debeissat, Phillip Webb, Mark Paluch

Field Summary

Fields

Modifier and Type	Field and Description
static String	DEFAULT_BLOCK_COMMENT_END_DELIMITER Default end delimiter for block comments within SQL scripts: "*/".
static String	DEFAULT_BLOCK_COMMENT_START_DELIMITER Default start delimiter for block comments within SQL scripts: "/*".
static String	DEFAULT_COMMENT_PREFIX Default prefix for single-line comments within SQL scripts: "--".
static String[]	DEFAULT_COMMENT_PREFIXES Default prefixes for single-line comments within SQL scripts: ["--"].
static String	DEFAULT_STATEMENT_SEPARATOR Default statement separator within SQL scripts: ";".
static String	EOF_STATEMENT_SEPARATOR End of file (EOF) SQL statement separator: "^^^ END OF SCRIPT ^^^".
static String	FALLBACK_STATEMENT_SEPARATOR Fallback statement separator within SQL scripts: "\n".

Constructor Summary

Constructors

Constructor and Description
ScriptUtils()

Method Summary

Modifier and Type	Method and Description
static boolean	containsSqlScriptDelimiters(String script, String delim) Does the provided SQL script contain the specified delimiter?
static reactor.core.publisher.Mono<Void>	executeSqlScript(io.r2dbc.spi.Connection connection, EncodedResource resource) Execute the given SQL script using default settings for statement separators, comment delimiters, and exception handling flags.
static reactor.core.publisher.Mono<Void>	executeSqlScript(io.r2dbc.spi.Connection connection, EncodedResource resource, DataBufferFactory dataBufferFactory, boolean continueOnError, boolean ignoreFailedDrops, String[] commentPrefixes, String separator, String blockCommentStartDelimiter, String blockCommentEndDelimiter) Execute the given SQL script.
static reactor.core.publisher.Mono<Void>	executeSqlScript(io.r2dbc.spi.Connection connection, EncodedResource resource, DataBufferFactory dataBufferFactory, boolean continueOnError, boolean ignoreFailedDrops, String commentPrefix, String separator, String blockCommentStartDelimiter, String blockCommentEndDelimiter) Execute the given SQL script.
static reactor.core.publisher.Mono<Void>	executeSqlScript(io.r2dbc.spi.Connection connection, Resource resource) Execute the given SQL script using default settings for statement separators, comment delimiters, and exception handling flags.
static reactor.core.publisher.Mono<String>	readScript(EncodedResource resource, DataBufferFactory dataBufferFactory) Read a script from the given resource, using "--" as the comment prefix and ";" as the statement separator, and build a String containing the lines.
static String	readScript(LineNumberReader lineNumberReader, String[] lineCommentPrefixes, String separator, String blockCommentEndDelimiter) Read a script from the provided LineNumberReader, using the supplied comment prefixes and statement separator, and build a String containing the lines.
static String	readScript(LineNumberReader lineNumberReader, String lineCommentPrefix, String separator, String blockCommentEndDelimiter) Read a script from the provided LineNumberReader, using the supplied comment prefix and statement separator, and build a String containing the lines.
static void	splitSqlScript(EncodedResource resource, String script, String separator, String[] commentPrefixes, String blockCommentStartDelimiter, String blockCommentEndDelimiter, List<String> statements) Split an SQL script into separate statements delimited by the provided separator string.
static void	splitSqlScript(EncodedResource resource, String script, String separator, String commentPrefix, String blockCommentStartDelimiter, String blockCommentEndDelimiter, List<String> statements) Split an SQL script into separate statements delimited by the provided separator string.
static void	splitSqlScript(String script, char separator, List<String> statements) Split an SQL script into separate statements delimited by the provided separator character.
static void	splitSqlScript(String script, String separator, List<String> statements) Split an SQL script into separate statements delimited by the provided separator string.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Field Detail

DEFAULT_STATEMENT_SEPARATOR

public static final String DEFAULT_STATEMENT_SEPARATOR

Default statement separator within SQL scripts: ";".

See Also:

Constant Field Values

FALLBACK_STATEMENT_SEPARATOR

public static final String FALLBACK_STATEMENT_SEPARATOR

Fallback statement separator within SQL scripts: "\n".

Used if neither a custom separator nor the DEFAULT_STATEMENT_SEPARATOR is present in a given script.

See Also:

Constant Field Values

EOF_STATEMENT_SEPARATOR

public static final String EOF_STATEMENT_SEPARATOR

End of file (EOF) SQL statement separator: "^^^ END OF SCRIPT ^^^".

This value may be supplied as the separator to executeSqlScript(Connection, EncodedResource, DataBufferFactory, boolean, boolean, String[], String, String, String) to denote that an SQL script contains a single statement (potentially spanning multiple lines) with no explicit statement separator. Note that such a script should not actually contain this value; it is merely a virtual statement separator.

See Also:

Constant Field Values

DEFAULT_COMMENT_PREFIX

public static final String DEFAULT_COMMENT_PREFIX

Default prefix for single-line comments within SQL scripts: "--".

See Also:

Constant Field Values

DEFAULT_COMMENT_PREFIXES

public static final String[] DEFAULT_COMMENT_PREFIXES

Default prefixes for single-line comments within SQL scripts: ["--"].

DEFAULT_BLOCK_COMMENT_START_DELIMITER

public static final String DEFAULT_BLOCK_COMMENT_START_DELIMITER

Default start delimiter for block comments within SQL scripts: "/*".

See Also:

Constant Field Values

DEFAULT_BLOCK_COMMENT_END_DELIMITER

public static final String DEFAULT_BLOCK_COMMENT_END_DELIMITER

Default end delimiter for block comments within SQL scripts: "*/".

See Also:

Constant Field Values

Constructor Detail

ScriptUtils

public ScriptUtils()

Method Detail

splitSqlScript

public static void splitSqlScript(String script,
                                  char separator,
                                  List<String> statements)
                           throws ScriptException

Split an SQL script into separate statements delimited by the provided separator character. Each individual statement will be added to the provided List.

Within the script, "--" will be used as the comment prefix; any text beginning with the comment prefix and extending to the end of the line will be omitted from the output. Similarly, "/*" and "*/" will be used as the start and end block comment delimiters: any text enclosed in a block comment will be omitted from the output. In addition, multiple adjacent whitespace characters will be collapsed into a single space.

Parameters:

script - the SQL script

separator - character separating each statement (typically a ';')

statements - the list that will contain the individual statements

Throws:

ScriptException - if an error occurred while splitting the SQL script

See Also:

splitSqlScript(String, String, List), splitSqlScript(EncodedResource, String, String, String, String, String, List)

splitSqlScript

public static void splitSqlScript(String script,
                                  String separator,
                                  List<String> statements)
                           throws ScriptException

Split an SQL script into separate statements delimited by the provided separator string. Each individual statement will be added to the provided List.

Within the script, "--" will be used as the comment prefix; any text beginning with the comment prefix and extending to the end of the line will be omitted from the output. Similarly, "/*" and "*/" will be used as the start and end block comment delimiters: any text enclosed in a block comment will be omitted from the output. In addition, multiple adjacent whitespace characters will be collapsed into a single space.

Parameters:

script - the SQL script

separator - text separating each statement (typically a ';' or newline character)

statements - the list that will contain the individual statements

Throws:

ScriptException - if an error occurred while splitting the SQL script

See Also:

splitSqlScript(String, char, List), splitSqlScript(EncodedResource, String, String, String, String, String, List)

splitSqlScript

public static void splitSqlScript(@Nullable
                                  EncodedResource resource,
                                  String script,
                                  String separator,
                                  String commentPrefix,
                                  String blockCommentStartDelimiter,
                                  String blockCommentEndDelimiter,
                                  List<String> statements)
                           throws ScriptException

Split an SQL script into separate statements delimited by the provided separator string. Each individual statement will be added to the provided List.

Within the script, the provided commentPrefix will be honored: any text beginning with the comment prefix and extending to the end of the line will be omitted from the output. Similarly, the provided blockCommentStartDelimiter and blockCommentEndDelimiter delimiters will be honored: any text enclosed in a block comment will be omitted from the output. In addition, multiple adjacent whitespace characters will be collapsed into a single space.

Parameters:

resource - the resource from which the script was read

script - the SQL script

separator - text separating each statement (typically a ';' or newline character)

commentPrefix - the prefix that identifies SQL line comments (typically "--")

blockCommentStartDelimiter - the start block comment delimiter; never null or empty

blockCommentEndDelimiter - the end block comment delimiter; never null or empty

statements - the list that will contain the individual statements

Throws:

ScriptException - if an error occurred while splitting the SQL script

splitSqlScript

public static void splitSqlScript(@Nullable
                                  EncodedResource resource,
                                  String script,
                                  String separator,
                                  String[] commentPrefixes,
                                  String blockCommentStartDelimiter,
                                  String blockCommentEndDelimiter,
                                  List<String> statements)
                           throws ScriptException

Split an SQL script into separate statements delimited by the provided separator string. Each individual statement will be added to the provided List.

Within the script, the provided commentPrefixes will be honored: any text beginning with one of the comment prefixes and extending to the end of the line will be omitted from the output. Similarly, the provided blockCommentStartDelimiter and blockCommentEndDelimiter delimiters will be honored: any text enclosed in a block comment will be omitted from the output. In addition, multiple adjacent whitespace characters will be collapsed into a single space.

Parameters:

resource - the resource from which the script was read

script - the SQL script

separator - text separating each statement (typically a ';' or newline character)

commentPrefixes - the prefixes that identify SQL line comments (typically "--")

blockCommentStartDelimiter - the start block comment delimiter; never null or empty

blockCommentEndDelimiter - the end block comment delimiter; never null or empty

statements - the list that will contain the individual statements

Throws:

ScriptException - if an error occurred while splitting the SQL script

readScript

public static reactor.core.publisher.Mono<String> readScript(EncodedResource resource,
                                                             DataBufferFactory dataBufferFactory)

Read a script from the given resource, using "--" as the comment prefix and ";" as the statement separator, and build a String containing the lines.

Parameters:

resource - the EncodedResource to be read

Returns:

String containing the script lines

readScript

public static String readScript(LineNumberReader lineNumberReader,
                                @Nullable
                                String lineCommentPrefix,
                                @Nullable
                                String separator,
                                @Nullable
                                String blockCommentEndDelimiter)
                         throws IOException

Read a script from the provided LineNumberReader, using the supplied comment prefix and statement separator, and build a String containing the lines.

Lines beginning with the comment prefix are excluded from the results; however, line comments anywhere else — for example, within a statement — will be included in the results.

Parameters:

lineNumberReader - the LineNumberReader containing the script to be processed

lineCommentPrefix - the prefix that identifies comments in the SQL script (typically "--")

separator - the statement separator in the SQL script (typically ";")

blockCommentEndDelimiter - the end block comment delimiter

Returns:

a String containing the script lines

Throws:

IOException - in case of I/O errors

readScript

public static String readScript(LineNumberReader lineNumberReader,
                                @Nullable
                                String[] lineCommentPrefixes,
                                @Nullable
                                String separator,
                                @Nullable
                                String blockCommentEndDelimiter)
                         throws IOException

Read a script from the provided LineNumberReader, using the supplied comment prefixes and statement separator, and build a String containing the lines.

Lines beginning with one of the comment prefixes are excluded from the results; however, line comments anywhere else — for example, within a statement — will be included in the results.

Parameters:

lineNumberReader - the LineNumberReader containing the script to be processed

lineCommentPrefixes - the prefixes that identify comments in the SQL script (typically "--")

separator - the statement separator in the SQL script (typically ";")

blockCommentEndDelimiter - the end block comment delimiter

Returns:

a String containing the script lines

Throws:

IOException - in case of I/O errors

containsSqlScriptDelimiters

public static boolean containsSqlScriptDelimiters(String script,
                                                  String delim)

Does the provided SQL script contain the specified delimiter?

Parameters:

script - the SQL script

delim - the string delimiting each statement - typically a ';' character

executeSqlScript

public static reactor.core.publisher.Mono<Void> executeSqlScript(io.r2dbc.spi.Connection connection,
                                                                 Resource resource)
                                                          throws ScriptException

Execute the given SQL script using default settings for statement separators, comment delimiters, and exception handling flags.

Statement separators and comments will be removed before executing individual statements within the supplied script.

Warning: this method does not release the provided Connection.

Parameters:

connection - the R2DBC connection to use to execute the script; already configured and ready to use

resource - the resource to load the SQL script from; encoded with the current platform's default encoding

Throws:

ScriptException - if an error occurred while executing the SQL script

See Also:

executeSqlScript(Connection, EncodedResource, DataBufferFactory, boolean, boolean, String[], String, String, String), DEFAULT_STATEMENT_SEPARATOR, DEFAULT_COMMENT_PREFIX, DEFAULT_BLOCK_COMMENT_START_DELIMITER, DEFAULT_BLOCK_COMMENT_END_DELIMITER, ConnectionFactoryUtils.getConnection(io.r2dbc.spi.ConnectionFactory), ConnectionFactoryUtils.releaseConnection(io.r2dbc.spi.Connection, io.r2dbc.spi.ConnectionFactory)

executeSqlScript

public static reactor.core.publisher.Mono<Void> executeSqlScript(io.r2dbc.spi.Connection connection,
                                                                 EncodedResource resource)
                                                          throws ScriptException

Execute the given SQL script using default settings for statement separators, comment delimiters, and exception handling flags.

Statement separators and comments will be removed before executing individual statements within the supplied script.

Warning: this method does not release the provided Connection.

Parameters:

connection - the R2DBC connection to use to execute the script; already configured and ready to use

resource - the resource (potentially associated with a specific encoding) to load the SQL script from

Throws:

ScriptException - if an error occurred while executing the SQL script

See Also:

executeSqlScript(Connection, EncodedResource, DataBufferFactory, boolean, boolean, String[], String, String, String), DEFAULT_STATEMENT_SEPARATOR, DEFAULT_COMMENT_PREFIX, DEFAULT_BLOCK_COMMENT_START_DELIMITER, DEFAULT_BLOCK_COMMENT_END_DELIMITER, ConnectionFactoryUtils.getConnection(io.r2dbc.spi.ConnectionFactory), ConnectionFactoryUtils.releaseConnection(io.r2dbc.spi.Connection, io.r2dbc.spi.ConnectionFactory)

executeSqlScript

public static reactor.core.publisher.Mono<Void> executeSqlScript(io.r2dbc.spi.Connection connection,
                                                                 EncodedResource resource,
                                                                 DataBufferFactory dataBufferFactory,
                                                                 boolean continueOnError,
                                                                 boolean ignoreFailedDrops,
                                                                 String commentPrefix,
                                                                 @Nullable
                                                                 String separator,
                                                                 String blockCommentStartDelimiter,
                                                                 String blockCommentEndDelimiter)
                                                          throws ScriptException

Execute the given SQL script.

Statement separators and comments will be removed before executing individual statements within the supplied script.

Warning: this method does not release the provided Connection.

Parameters:

connection - the R2DBC connection to use to execute the script; already configured and ready to use

resource - the resource (potentially associated with a specific encoding) to load the SQL script from

continueOnError - whether or not to continue without throwing an exception in the event of an error

ignoreFailedDrops - whether or not to continue in the event of specifically an error on a DROP statement

commentPrefix - the prefix that identifies single-line comments in the SQL script (typically "--")

separator - the script statement separator; defaults to ";" if not specified and falls back to "\n" as a last resort; may be set to "^^^ END OF SCRIPT ^^^" to signal that the script contains a single statement without a separator

blockCommentStartDelimiter - the start block comment delimiter

blockCommentEndDelimiter - the end block comment delimiter

Throws:

ScriptException - if an error occurred while executing the SQL script

See Also:

DEFAULT_STATEMENT_SEPARATOR, FALLBACK_STATEMENT_SEPARATOR, EOF_STATEMENT_SEPARATOR, ConnectionFactoryUtils.getConnection(io.r2dbc.spi.ConnectionFactory), ConnectionFactoryUtils.releaseConnection(io.r2dbc.spi.Connection, io.r2dbc.spi.ConnectionFactory)

executeSqlScript

public static reactor.core.publisher.Mono<Void> executeSqlScript(io.r2dbc.spi.Connection connection,
                                                                 EncodedResource resource,
                                                                 DataBufferFactory dataBufferFactory,
                                                                 boolean continueOnError,
                                                                 boolean ignoreFailedDrops,
                                                                 String[] commentPrefixes,
                                                                 @Nullable
                                                                 String separator,
                                                                 String blockCommentStartDelimiter,
                                                                 String blockCommentEndDelimiter)
                                                          throws ScriptException

Execute the given SQL script.

Statement separators and comments will be removed before executing individual statements within the supplied script.

Warning: this method does not release the provided Connection.

Parameters:

connection - the R2DBC connection to use to execute the script; already configured and ready to use

resource - the resource (potentially associated with a specific encoding) to load the SQL script from

continueOnError - whether or not to continue without throwing an exception in the event of an error

ignoreFailedDrops - whether or not to continue in the event of specifically an error on a DROP statement

commentPrefixes - the prefixes that identify single-line comments in the SQL script (typically "--")

separator - the script statement separator; defaults to ";" if not specified and falls back to "\n" as a last resort; may be set to "^^^ END OF SCRIPT ^^^" to signal that the script contains a single statement without a separator

blockCommentStartDelimiter - the start block comment delimiter

blockCommentEndDelimiter - the end block comment delimiter

Throws:

ScriptException - if an error occurred while executing the SQL script

See Also:

DEFAULT_STATEMENT_SEPARATOR, FALLBACK_STATEMENT_SEPARATOR, EOF_STATEMENT_SEPARATOR, ConnectionFactoryUtils.getConnection(io.r2dbc.spi.ConnectionFactory), ConnectionFactoryUtils.releaseConnection(io.r2dbc.spi.Connection, io.r2dbc.spi.ConnectionFactory)