liquibase.change

Class ChangeParameterMetaData

java.lang.Object

liquibase.change.ChangeParameterMetaData

public class ChangeParameterMetaData
extends Object

Static metadata about a Change parameter. Instances of this class are tracked within ChangeMetaData and are immutable.

Field Summary

Fields

Modifier and Type	Field and Description
static String	ALL
static String	COMPUTE
static String	NONE

Constructor Summary

Constructors

Constructor and Description
ChangeParameterMetaData(Change change, String parameterName, String displayName, String description, Map<String,Object> exampleValues, String since, Type dataType, String[] requiredForDatabase, String[] supportedDatabases, String mustEqualExisting, LiquibaseSerializable.SerializationType serializationType)

Method Summary

Modifier and Type	Method and Description
protected Set<String>	analyzeRequiredDatabases(String[] requiredDatabases)
protected Set<String>	analyzeSupportedDatabases(String[] supportedDatabases)
Object	getCurrentValue(Change change) Returns the current value of this parameter for the given Change.
String	getDataType() Return the data type of value stored in this parameter.
Class	getDataTypeClass()
Type[]	getDataTypeClassParameters()
String	getDescription()
String	getDisplayName() A more friendly name of the parameter.
Object	getExampleValue(Database database)
String	getMustEqualExisting() Returns a dot-delimited chain of DatabaseObject fields describing what existing value this parameter would need to be set if applying the Change to a particular DatabaseObject.
String	getParameterName() Programmatic Name of the parameter.
Set<String>	getRequiredForDatabase() Return the database types for which this parameter is required.
LiquibaseSerializable.SerializationType	getSerializationType() Return the LiquibaseSerializable.SerializationType to use when serializing this object.
String	getSince()
Set<String>	getSupportedDatabases()
boolean	isRequiredFor(Database database) A convenience method for testing the value returned by getRequiredForDatabase() against a given database.
void	setValue(Change change, Object value) Sets the value of this parameter on the given change.
boolean	supports(Database database)
String	toString()
ChangeParameterMetaData	withAccessors(Method readMethod, Method writeMethod)

Methods inherited from class java.lang.Object

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

Field Detail

COMPUTE

public static final String COMPUTE

See Also:

Constant Field Values

ALL

public static final String ALL

See Also:

Constant Field Values

NONE

public static final String NONE

See Also:

Constant Field Values

Constructor Detail

ChangeParameterMetaData

public ChangeParameterMetaData(Change change,
                               String parameterName,
                               String displayName,
                               String description,
                               Map<String,Object> exampleValues,
                               String since,
                               Type dataType,
                               String[] requiredForDatabase,
                               String[] supportedDatabases,
                               String mustEqualExisting,
                               LiquibaseSerializable.SerializationType serializationType)

Method Detail

withAccessors

public ChangeParameterMetaData withAccessors(Method readMethod,
                                             Method writeMethod)

analyzeSupportedDatabases

protected Set<String> analyzeSupportedDatabases(String[] supportedDatabases)

analyzeRequiredDatabases

protected Set<String> analyzeRequiredDatabases(String[] requiredDatabases)

getParameterName

public String getParameterName()

Programmatic Name of the parameter. Will not contain spaces so it can be used for XMl tag names etc. By convention, Change names should start be camel case starting with a lower case letter.

getDisplayName

public String getDisplayName()

A more friendly name of the parameter.

getSince

public String getSince()

getDataType

public String getDataType()

Return the data type of value stored in this parameter. Used for documentation and integration purposes as well as validation.

getDataTypeClass

public Class getDataTypeClass()

getDataTypeClassParameters

public Type[] getDataTypeClassParameters()

getRequiredForDatabase

public Set<String> getRequiredForDatabase()

Return the database types for which this parameter is required. The strings returned correspond to the values returned by Database.getShortName(). If the parameter is required for all databases, this will return the string "all" as an element. If the parameter is required for no databases, this will return an empty set. Passing the string "none" to the constructor also results in an empty set. This method will never return a null value

getSupportedDatabases

public Set<String> getSupportedDatabases()

isRequiredFor

public boolean isRequiredFor(Database database)

A convenience method for testing the value returned by getRequiredForDatabase() against a given database. Returns true if the Database.getShortName() method is contained in the required databases or the required database list contains the string "all"

supports

public boolean supports(Database database)

getCurrentValue

public Object getCurrentValue(Change change)

Returns the current value of this parameter for the given Change.

setValue

public void setValue(Change change,
                     Object value)

Sets the value of this parameter on the given change.

getMustEqualExisting

public String getMustEqualExisting()

Returns a dot-delimited chain of DatabaseObject fields describing what existing value this parameter would need to be set if applying the Change to a particular DatabaseObject.

For example, in an addColumn Change, the "name" parameter would return "column.name" because if you know of an existing Column object, the "name" parameter needs to be set to the column's name. In the addColumn's "tableName" parameter, this method would return "column.table.name".

The values of the chain correspond to the DatabaseObject.getObjectTypeName() and DatabaseObject.getAttributes()

This method is used by integrations that want to generate Change instances or configurations pre-filled with data required to apply to an existing database object.

getSerializationType

public LiquibaseSerializable.SerializationType getSerializationType()

Return the LiquibaseSerializable.SerializationType to use when serializing this object.

getExampleValue

public Object getExampleValue(Database database)

getDescription

public String getDescription()

toString

public String toString()

Overrides:

toString in class Object