org.apache.openjpa.jdbc.schema
Class XMLSchemaParser

java.lang.Object
  org.xml.sax.helpers.DefaultHandler
      org.apache.openjpa.lib.meta.XMLMetaDataParser
          org.apache.openjpa.jdbc.schema.XMLSchemaParser

All Implemented Interfaces:

SchemaParser, MetaDataParser, ContentHandler, DTDHandler, EntityResolver, ErrorHandler, LexicalHandler

public class XMLSchemaParser
extends XMLMetaDataParser
implements SchemaParser

Custom SAX parser used to parse Schema objects. The parser will place all parsed schemas into the current SchemaGroup, set via the setSchemaGroup(org.apache.openjpa.jdbc.schema.SchemaGroup) method. This allows parsing of multiple files into a single schema group. The parser deserializes from the following XML format:
<!ELEMENT schemas (schema)+>
<!ELEMENT schema (table|sequence)+>
<!ATTLIST schema name CDATA #IMPLIED>
<!ELEMENT table (column|index|pk|fk|unique)+>
<!ATTLIST table name CDATA #REQUIRED>
<!ELEMENT column EMPTY>
<!ATTLIST column name CDATA #REQUIRED>
<!ATTLIST column type (array|bigint|binary|bit|blob|char|clob |date|decimal|distinct|double|float|integer|java_object |longvarbinary|longvarchar|null|numeric|other|real|ref|smallint|struct |time|timstamp|tinyint|varbinary|varchar) #REQUIRED>
<!ATTLIST column type-name CDATA #IMPLIED>
<!ATTLIST column size CDATA #IMPLIED>
<!ATTLIST column decimal-digits CDATA #IMPLIED>
<!ATTLIST column not-null (true|false) "false">
<!ATTLIST column default CDATA #IMPLIED>
<!ATTLIST column auto-assign (true|false) "false">
<!ELEMENT index (on)*>
<!ATTLIST index name CDATA #REQUIRED>
<!ATTLIST index column CDATA #IMPLIED>
<!ATTLIST index unique (true|false) "false">
<!ELEMENT on EMPTY>
<!ATTLIST on column CDATA #REQUIRED>
<!ELEMENT pk (on)*>
<!ATTLIST pk name CDATA #IMPLIED>
<!ATTLIST pk column CDATA #IMPLIED>
<!ELEMENT fk (join)*>
<!ATTLIST fk name CDATA #IMPLIED>
<!ATTLIST fk deferred (true|false) "false">
<!ATTLIST fk column CDATA #IMPLIED>
<!ATTLIST fk to-table CDATA #REQUIRED>
<!ATTLIST fk delete-action (cascade|default|restrict|none|null) "none">
<!ATTLIST fk update-action (cascade|default|restrict|none|null) "none">
<!ELEMENT unique (on)*>
<!ATTLIST unique name CDATA #IMPLIED>
<!ATTLIST unique column CDATA #IMPLIED>
<!ATTLIST unique deferred (true|false) "false">
<!ELEMENT join EMPTY>
<!ATTLIST join column CDATA #IMPLIED>
<!ATTLIST join value CDATA #IMPLIED>
<!ATTLIST join to-column CDATA #REQUIRED>
<!ELEMENT sequence EMPTY>
<!ATTLIST sequence name CDATA #REQUIRED>
<!ATTLIST sequence initial-value CDATA #IMPLIED>
<!ATTLIST sequence increment CDATA #IMPLIED>
<!ATTLIST sequence allocate CDATA #IMPLIED>
Schema parsers are not threadsafe.

Author:

Abe White

Nested Class Summary

static class

XMLSchemaParser.UniqueInfo Used to hold unique constraint info before it is resolved.

Constructor Summary

XMLSchemaParser(JDBCConfiguration conf)
Constructor.

Method Summary

protected void	endElement(String name) Override this method marking the end of some element.
protected void	finish() Parse the schema relating to the given class.
boolean	getDelayConstraintResolve() Delay resolution of foreign key constraints until SchemaParser.resolveConstraints() is called.
protected Reader	getDocType() Override this method to return any DOCTYPE declaration that should be dynamically included in xml documents that will be validated.
SchemaGroup	getSchemaGroup() Return the current schema group.
protected void	reset() Override this method to clear any state and ready the parser for a new document.
void	resolveConstraints() If this parser is in delayed resolve mode, resolve all constraints.
void	setDelayConstraintResolve(boolean delay) Delay resolution of foreign key constraints until SchemaParser.resolveConstraints() is called.
void	setSchemaGroup(SchemaGroup group) Set the current schema group; this clears all state from the last group.
protected boolean	startElement(String name, Attributes attrs) Override this method marking the start of some element.

Methods inherited from class org.apache.openjpa.lib.meta.XMLMetaDataParser

addComments, addResult, characters, clear, clearDeferredMetaData, comment, currentClassLoader, currentComments, currentDepth, currentLocation, currentText, endCDATA, endDTD, endElement, endEntity, error, fatalError, getClassLoader, getException, getException, getException, getLexicalHandler, getLocation, getLog, getParseComments, getParseText, getResults, getSchemaSource, getSourceFile, getSourceIsSystemId, getSourceName, getSuffix, ignoreContent, isCaching, isParsing, isValidating, parse, parse, parse, parse, parse, parse, parsed, parseNewResource, setCaching, setClassLoader, setDocumentLocator, setLexicalHandler, setLocation, setLog, setParseComments, setParseText, setParsing, setSourceIsSystemId, setSuffix, setValidating, startCDATA, startDTD, startElement, startEntity

Methods inherited from class org.xml.sax.helpers.DefaultHandler

endDocument, endPrefixMapping, ignorableWhitespace, notationDecl, processingInstruction, resolveEntity, skippedEntity, startDocument, startPrefixMapping, unparsedEntityDecl, warning

Methods inherited from class java.lang.Object

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

Methods inherited from interface org.apache.openjpa.lib.meta.MetaDataParser

clear, getResults, parse, parse, parse, parse, parse, parse, setClassLoader

Constructor Detail

XMLSchemaParser

public XMLSchemaParser(JDBCConfiguration conf)

Constructor. Supply configuration.

Method Detail

getDelayConstraintResolve

public boolean getDelayConstraintResolve()

Description copied from interface: SchemaParser

Delay resolution of foreign key constraints until SchemaParser.resolveConstraints() is called. This allows you to parse multiple resources where a foreign key in one resource might refer to a table in another.

Specified by:

getDelayConstraintResolve in interface SchemaParser

setDelayConstraintResolve

public void setDelayConstraintResolve(boolean delay)

Description copied from interface: SchemaParser

Delay resolution of foreign key constraints until SchemaParser.resolveConstraints() is called. This allows you to parse multiple resources where a foreign key in one resource might refer to a table in another.

Specified by:

setDelayConstraintResolve in interface SchemaParser

resolveConstraints

public void resolveConstraints()

Description copied from interface: SchemaParser

If this parser is in delayed resolve mode, resolve all constraints.

Specified by:

resolveConstraints in interface SchemaParser

getSchemaGroup

public SchemaGroup getSchemaGroup()

Description copied from interface: SchemaParser

Return the current schema group.

Specified by:

getSchemaGroup in interface SchemaParser

setSchemaGroup

public void setSchemaGroup(SchemaGroup group)

Description copied from interface: SchemaParser

Set the current schema group; this clears all state from the last group.

Specified by:

setSchemaGroup in interface SchemaParser

finish

protected void finish()

Parse the schema relating to the given class. The schemas will be added to the current schema group.

Overrides:

finish in class XMLMetaDataParser

reset

protected void reset()

Description copied from class: XMLMetaDataParser

Override this method to clear any state and ready the parser for a new document. Subclasses should call super.reset() to clear superclass state.

Overrides:

reset in class XMLMetaDataParser

getDocType

protected Reader getDocType()
                     throws IOException

Description copied from class: XMLMetaDataParser

Override this method to return any DOCTYPE declaration that should be dynamically included in xml documents that will be validated. Returns null by default.

Overrides:

getDocType in class XMLMetaDataParser

Throws:

IOException

startElement

protected boolean startElement(String name,
                               Attributes attrs)
                        throws SAXException

Description copied from class: XMLMetaDataParser

Override this method marking the start of some element. If this method returns false, the content of the element and the end element event will be ignored.

Specified by:

startElement in class XMLMetaDataParser

Throws:

SAXException

endElement

protected void endElement(String name)

Description copied from class: XMLMetaDataParser

Override this method marking the end of some element.

Specified by:

endElement in class XMLMetaDataParser