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## org.apache.openjpa.meta
Class SequenceMetaData

    java.lang.Object
      org.apache.openjpa.meta.SequenceMetaData

All Implemented Interfaces:
  SourceTracker, Closeable, Commentable, MetaDataContext

Direct Known Subclasses:
  SequenceMapping

    public class SequenceMetaData

extends Object
implements SourceTracker, MetaDataContext, Closeable, Commentable

Metadata about a named sequence.

Since:
  0.4.0
Author:
  Abe White

Nested Class Summary
`static interface` | `SequenceMetaData.SequenceFactory` Allow facades to supply adapters from a spec sequence type to the OpenJPA sequence type.

Field Summary
`static String` | `IMPL_NATIVE` Default plugin alias name; every back end should have some 'native' sequence implementation.
`static String` | `IMPL_TIME` Time-based sequence values.
`static String` | `NAME_SYSTEM` Sequence name that means to use the system default sequence.

Fields inherited from interface org.apache.openjpa.lib.meta.SourceTracker
`SRC_ANNOTATIONS, SRC_OTHER, SRC_XML`

Fields inherited from interface org.apache.openjpa.lib.xml.Commentable
`EMPTY_COMMENTS`

Constructor Summary
`SequenceMetaData(String name, MetaDataRepository repos)` Constructor; supply sequence name.

Method Summary
`protected void` | `addStandardProperties(StringBuffer props)` Add standard properties to the given properties buffer.
`protected void` | `appendProperty(StringBuffer props, String name, int val)` Add an int property to the buffer.
`protected void` | `appendProperty(StringBuffer props, String name, String val)` Add a string property to the buffer.
`void` | `close()` Close user sequence instance.
`int` | `getAllocate()` Sequence values to allocate, or -1 for default.
`String[]` | `getComments()` Return comments, or empty array if none.
`int` | `getIncrement()` Sequence increment, or -1 for default.
`int` | `getInitialValue()` Initial sequence value, or -1 for default.
`Seq` | `getInstance(ClassLoader envLoader)` Return the initialized sequence instance.
`String` | `getName()` The sequence name.
`MetaDataRepository` | `getRepository()` The owning repository.
`String` | `getResourceName()` Return the domain-meaningful name of the resource that was loaded from this source.
`String` | `getSequence()` Native sequence name.
`SequenceMetaData.SequenceFactory` | `getSequenceFactory()` A factory to transform spec sequences produced by user factories into the OpenJPA sequence type.
`String` | `getSequencePlugin()` Plugin string describing the `Seq`.
`File` | `getSourceFile()` Return the file from which this instance was parsed.
`Object` | `getSourceScope()` Return the domain-dependent scope of this instance within its file.
`int` | `getSourceType()` Return the type of source.
`int` | `getType()` The sequence type.
`protected Seq` | `instantiate(ClassLoader envLoader)` Create a new uninitialized instance of this sequence.
`protected PluginValue` | `newPluginValue(String property)` Create a new plugin value for sequences.
`void` | `setAllocate(int allocate)` Sequence values to allocate, or -1 for default.
`void` | `setComments(String[] comments)` Set comments.
`void` | `setIncrement(int increment)` Sequence increment, or -1 for default.
`void` | `setInitialValue(int initial)` Initial sequence value, or -1 for default.
`void` | `setSequence(String sequence)` Native sequence name.
`void` | `setSequenceFactory(SequenceMetaData.SequenceFactory factory)` A factory to transform spec sequences produced by user factories into the OpenJPA sequence type.
`void` | `setSequencePlugin(String plugin)` Plugin string describing the `Seq`.
`void` | `setSource(File file, Object scope, int srcType)`
`void` | `setType(int type)` The sequence type.
`String` | `toString()`

Methods inherited from class java.lang.Object
`clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait`

Field Detail

### NAME_SYSTEM

    public static final String NAME_SYSTEM

  Sequence name that means to use the system default sequence.

  See Also:
    Constant Field Values

### IMPL_NATIVE

    public static final String IMPL_NATIVE

  Default plugin alias name; every back end should have some 'native' sequence implementation.

  See Also:
    Constant Field Values

### IMPL_TIME

    public static final String IMPL_TIME

  Time-based sequence values.

  See Also:
    Constant Field Values

Constructor Detail

### SequenceMetaData

    public SequenceMetaData(String name,
                            MetaDataRepository repos)

  Constructor; supply sequence name.

Method Detail

### getRepository

    public MetaDataRepository getRepository()

  The owning repository.

  Specified by:
    `getRepository` in interface `MetaDataContext`

### getName

    public String getName()

  The sequence name.

### getSourceFile

    public File getSourceFile()

  Description copied from interface: `SourceTracker`
  Return the file from which this instance was parsed.

  Specified by:
    `getSourceFile` in interface `SourceTracker`

### getSourceScope

    public Object getSourceScope()

  Description copied from interface: `SourceTracker`
  Return the domain-dependent scope of this instance within its file.

  Specified by:
    `getSourceScope` in interface `SourceTracker`

### getSourceType

    public int getSourceType()

  Description copied from interface: `SourceTracker`
  Return the type of source.

  Specified by:
    `getSourceType` in interface `SourceTracker`

### setSource

    public void setSource(File file,
                          Object scope,
                          int srcType)

### getResourceName

    public String getResourceName()

  Description copied from interface: `SourceTracker`
  Return the domain-meaningful name of the resource that was loaded from this source. I.e., if we had loaded the source for a Java class, this would return the name of the class.

  Specified by:
    `getResourceName` in interface `SourceTracker`

### getType

    public int getType()

  The sequence type.

### setType

    public void setType(int type)

  The sequence type.

### getSequence

    public String getSequence()

  Native sequence name.

### setSequence

    public void setSequence(String sequence)

  Native sequence name.

### getIncrement

    public int getIncrement()

  Sequence increment, or -1 for default.

### setIncrement

    public void setIncrement(int increment)

  Sequence increment, or -1 for default.

### getAllocate

    public int getAllocate()

  Sequence values to allocate, or -1 for default.

### setAllocate

    public void setAllocate(int allocate)

  Sequence values to allocate, or -1 for default.

### getInitialValue

    public int getInitialValue()

  Initial sequence value, or -1 for default.

### setInitialValue

    public void setInitialValue(int initial)

  Initial sequence value, or -1 for default.

### getSequencePlugin

    public String getSequencePlugin()

  Plugin string describing the `Seq`.

### setSequencePlugin

    public void setSequencePlugin(String plugin)

  Plugin string describing the `Seq`.

### getSequenceFactory

    public SequenceMetaData.SequenceFactory getSequenceFactory()

  A factory to transform spec sequences produced by user factories into the OpenJPA sequence type.

### setSequenceFactory

    public void setSequenceFactory(SequenceMetaData.SequenceFactory factory)

  A factory to transform spec sequences produced by user factories into the OpenJPA sequence type.

### getInstance

    public Seq getInstance(ClassLoader envLoader)

  Return the initialized sequence instance.

### instantiate

    protected Seq instantiate(ClassLoader envLoader)

  Create a new uninitialized instance of this sequence.

### newPluginValue

    protected PluginValue newPluginValue(String property)

  Create a new plugin value for sequences. Returns a standard `SeqValue` by default.

### addStandardProperties

    protected void addStandardProperties(StringBuffer props)

  Add standard properties to the given properties buffer.

### appendProperty

    protected void appendProperty(StringBuffer props,
                                  String name,
                                  String val)

  Add a string property to the buffer. Nothing will be added if value is null or empty string.

### appendProperty

    protected void appendProperty(StringBuffer props,
                                  String name,
                                  int val)

  Add an int property to the buffer. Nothing will be added if value is -1.

### close

    public void close()

  Close user sequence instance.

  Specified by:
    `close` in interface `Closeable`

### toString

    public String toString()

  Overrides:
    `toString` in class `Object`

### getComments

    public String[] getComments()

  Description copied from interface: `Commentable`
  Return comments, or empty array if none.

  Specified by:
    `getComments` in interface `Commentable`

### setComments

    public void setComments(String[] comments)

  Description copied from interface: `Commentable`
  Set comments.

  Specified by:
    `setComments` in interface `Commentable`

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Copyright © 2006 Apache Software Foundation. All Rights Reserved.