/*
* ModeShape (http://www.modeshape.org)
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package org.modeshape.connector.meta.jdbc;
import java.sql.Connection;
import java.util.List;
import java.util.regex.Matcher;
import java.util.regex.Pattern;
import org.modeshape.schematic.document.Document;
import org.modeshape.jcr.JcrNtLexicon;
import org.modeshape.jcr.spi.federation.DocumentWriter;
/**
* Class which converts foreign key metadata to connector documents
*
* @author Horia Chiorean (hchiorea@redhat.com)
*/
public class ForeignKeyRetriever extends AbstractMetadataRetriever {
private static final Pattern FK_PATH_PATTERN = Pattern.compile(
"/([^/]+)/([^/]+)/([^/]+)/tables/([^/]+)/foreignKeys/([^/]+)");
private static final String FK_PREFIX = "fk";
private static final Pattern FK_ID_PATTERN = Pattern.compile("([^@]+)@([^@]+)@([^@]+)@([^@]+)@" + FK_PREFIX + "@([^@]+)");
protected ForeignKeyRetriever( JdbcMetadataConnector connector ) {
super(connector);
}
@Override
protected Document getDocumentById( String id,
DocumentWriter writer,
Connection connection ) {
String fkId = fkIdFrom(id);
String tableId = tableIdFrom(id);
String catalogId = catalogIdFrom(id);
String catalog = catalogId;
if (catalog.equalsIgnoreCase(connector.getDefaultCatalogName())) {
catalog = null;
}
String schemaId = schemaIdFrom(id);
String schema = schemaId;
if (schema.equalsIgnoreCase(connector.getDefaultSchemaName())) {
schema = null;
}
writer.setPrimaryType(JcrNtLexicon.UNSTRUCTURED);
writer.addMixinType(JdbcMetadataLexicon.FOREIGN_KEY);
writer.setParent(TableRetriever.documentId(DatabaseRetriever.ID, catalogId, schemaId, tableId, true));
List<ForeignKeyMetadata> foreignKeyMetadatas = connector.getMetadataCollector().getForeignKeys(connection, catalog,
schema, tableId, fkId);
if (!foreignKeyMetadatas.isEmpty()) {
ForeignKeyMetadata metadata = foreignKeyMetadatas.get(0);
writer.addProperty(JdbcMetadataLexicon.PRIMARY_KEY_CATALOG_NAME, metadata.getPrimaryKeyCatalogName());
writer.addProperty(JdbcMetadataLexicon.PRIMARY_KEY_SCHEMA_NAME, metadata.getPrimaryKeySchemaName());
writer.addProperty(JdbcMetadataLexicon.PRIMARY_KEY_TABLE_NAME, metadata.getPrimaryKeyTableName());
writer.addProperty(JdbcMetadataLexicon.PRIMARY_KEY_COLUMN_NAME, metadata.getPrimaryKeyColumnName());
writer.addProperty(JdbcMetadataLexicon.FOREIGN_KEY_CATALOG_NAME, metadata.getForeignKeyCatalogName());
writer.addProperty(JdbcMetadataLexicon.FOREIGN_KEY_SCHEMA_NAME, metadata.getForeignKeySchemaName());
writer.addProperty(JdbcMetadataLexicon.FOREIGN_KEY_TABLE_NAME, metadata.getForeignKeyTableName());
writer.addProperty(JdbcMetadataLexicon.FOREIGN_KEY_COLUMN_NAME, metadata.getForeignKeyColumnName());
writer.addProperty(JdbcMetadataLexicon.SEQUENCE_NR, metadata.getSequenceNr());
writer.addProperty(JdbcMetadataLexicon.UPDATE_RULE, metadata.getUpdateRule());
writer.addProperty(JdbcMetadataLexicon.DELETE_RULE, metadata.getDeleteRule());
writer.addProperty(JdbcMetadataLexicon.FOREIGN_KEY_NAME, metadata.getForeignKeyName());
writer.addProperty(JdbcMetadataLexicon.PRIMARY_KEY_NAME, metadata.getPrimaryKeyName());
writer.addProperty(JdbcMetadataLexicon.DEFERRABILITY, metadata.getDeferrability());
}
return writer.document();
}
private String fkIdFrom( String id ) {
Matcher matcher = FK_ID_PATTERN.matcher(id);
return matcher.matches() ? matcher.group(5) : null;
}
private String tableIdFrom( String id ) {
Matcher matcher = FK_ID_PATTERN.matcher(id);
return matcher.matches() ? matcher.group(4) : null;
}
private String schemaIdFrom( String id ) {
Matcher matcher = FK_ID_PATTERN.matcher(id);
return matcher.matches() ? matcher.group(3) : null;
}
private String catalogIdFrom( String id ) {
Matcher matcher = FK_ID_PATTERN.matcher(id);
return matcher.matches() ? matcher.group(2) : null;
}
@Override
protected String idFrom( String path ) {
Matcher fkMatcher = FK_PATH_PATTERN.matcher(path);
if (fkMatcher.matches()) {
return documentId(fkMatcher.group(1), fkMatcher.group(2), fkMatcher.group(3), fkMatcher.group(4), fkMatcher.group(
5));
}
return null;
}
@Override
protected boolean canHandle( String id ) {
return FK_ID_PATTERN.matcher(id).matches();
}
static String documentId( String databaseId,
String catalogId,
String schemaId,
String tableId,
String fkId ) {
return generateId(databaseId, catalogId, schemaId, tableId, FK_PREFIX, fkId);
}
}