liquibase.parser

Interface ChangeLogParser

All Superinterfaces:

LiquibaseParser, PrioritizedService

All Known Implementing Classes:

AbstractChangeLogParser, FormattedSqlChangeLogParser, JsonChangeLogParser, SqlChangeLogParser, XMLChangeLogSAXParser, YamlChangeLogParser

public interface ChangeLogParser
extends LiquibaseParser

Defines the methods a class which is able to parse a Liquibase changelog file must support. Different parsers are able to parse different file formats (e.g. XML, YAML, JSON, ...)

Field Summary

Fields inherited from interface liquibase.servicelocator.PrioritizedService

COMPARATOR, PRIORITY_DATABASE, PRIORITY_DEFAULT

Method Summary

Modifier and Type	Method and Description
DatabaseChangeLog	parse(String physicalChangeLogLocation, ChangeLogParameters changeLogParameters, ResourceAccessor resourceAccessor) Parses a Liquibase database changelog and returns the parsed form as an object.
boolean	supports(String changeLogFile, ResourceAccessor resourceAccessor) Checks if the file format is supported by an implementing ChangeLogParser and returns true if that is the case.

Methods inherited from interface liquibase.servicelocator.PrioritizedService

getPriority

Method Detail

parse

DatabaseChangeLog parse(String physicalChangeLogLocation,
                        ChangeLogParameters changeLogParameters,
                        ResourceAccessor resourceAccessor)
                 throws ChangeLogParseException

Parses a Liquibase database changelog and returns the parsed form as an object.

Parameters:

physicalChangeLogLocation - the physical location of the changelog. The exakt file formats and locations where can load changelog files from depend on the implementations and capabilities of the implementing parsers.

changeLogParameters - parameters given by the end user that should be applied while parsing the changelog (i.e. replacement of ${placeholders} inside the changelogs with user-defined content)

resourceAccessor - a Java resource accessor

Returns:

the parsed ChangeLog in object form

Throws:

ChangeLogParseException - if an error occurs during parsing of the ChangeLog

supports

boolean supports(String changeLogFile,
                 ResourceAccessor resourceAccessor)

Checks if the file format is supported by an implementing ChangeLogParser and returns true if that is the case.

Parameters:

changeLogFile - the location of the changelog file

resourceAccessor - the resource accessor

Returns:

true if the file format is supported, false if it is not.