/*
* 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 column metadata to connector documents.
*
* @author Horia Chiorean (hchiorea@redhat.com)
*/
public class ColumnRetriever extends AbstractMetadataRetriever {
private static final Pattern COLUMN_PATH_PATTERN = Pattern.compile("/([^/]+)/([^/]+)/([^/]+)/tables/([^/]+)/([^/]+)");
private static final String COLUMN_PREFIX = "col";
private static final Pattern COLUMN_ID_PATTERN = Pattern.compile(
"([^@]+)@([^@]+)@([^@]+)@([^@]+)@" + COLUMN_PREFIX + "@([^@]+)");
protected ColumnRetriever( JdbcMetadataConnector connector ) {
super(connector);
}
@Override
protected Document getDocumentById( String id,
DocumentWriter writer,
Connection connection ) {
String columnId = columnIdFrom(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.COLUMN);
writer.setParent(TableRetriever.documentId(DatabaseRetriever.ID, catalogId, schemaId, tableId, false));
List<ColumnMetadata> metadatas = connector.getMetadataCollector().getColumns(connection, catalog, schema, tableId,
columnId);
if (!metadatas.isEmpty()) {
ColumnMetadata columnMetadata = metadatas.get(0);
writer.addProperty(JdbcMetadataLexicon.JDBC_DATA_TYPE, columnMetadata.getJdbcDataType());
writer.addProperty(JdbcMetadataLexicon.TYPE_NAME, columnMetadata.getTypeName());
writer.addProperty(JdbcMetadataLexicon.COLUMN_SIZE, columnMetadata.getColumnSize());
writer.addProperty(JdbcMetadataLexicon.DECIMAL_DIGITS, columnMetadata.getDecimalDigits());
writer.addProperty(JdbcMetadataLexicon.RADIX, columnMetadata.getRadix());
writer.addProperty(JdbcMetadataLexicon.NULLABLE, columnMetadata.getNullable());
writer.addProperty(JdbcMetadataLexicon.DESCRIPTION, columnMetadata.getDescription());
writer.addProperty(JdbcMetadataLexicon.LENGTH, columnMetadata.getLength());
writer.addProperty(JdbcMetadataLexicon.ORDINAL_POSITION, columnMetadata.getOrdinalPosition());
writer.addProperty(JdbcMetadataLexicon.SCOPE_CATALOG_NAME, columnMetadata.getScopeCatalogName());
writer.addProperty(JdbcMetadataLexicon.SCOPE_SCHEMA_NAME, columnMetadata.getScopeSchemaName());
writer.addProperty(JdbcMetadataLexicon.SCOPE_TABLE_NAME, columnMetadata.getScopeTableName());
writer.addProperty(JdbcMetadataLexicon.SCOPE_SCHEMA_NAME, columnMetadata.getScopeSchemaName());
writer.addProperty(JdbcMetadataLexicon.SOURCE_JDBC_DATA_TYPE, columnMetadata.getSourceJdbcDataType());
writer.addProperty(JdbcMetadataLexicon.DEFAULT_VALUE, columnMetadata.getDefaultValue());
}
return writer.document();
}
private String columnIdFrom( String id ) {
Matcher matcher = COLUMN_ID_PATTERN.matcher(id);
return matcher.matches() ? matcher.group(5) : null;
}
private String tableIdFrom( String id ) {
Matcher matcher = COLUMN_ID_PATTERN.matcher(id);
return matcher.matches() ? matcher.group(4) : null;
}
private String schemaIdFrom( String id ) {
Matcher matcher = COLUMN_ID_PATTERN.matcher(id);
return matcher.matches() ? matcher.group(3) : null;
}
private String catalogIdFrom( String id ) {
Matcher matcher = COLUMN_ID_PATTERN.matcher(id);
return matcher.matches() ? matcher.group(2) : null;
}
@Override
protected String idFrom( String path ) {
Matcher columnNameMatcher = COLUMN_PATH_PATTERN.matcher(path);
if (columnNameMatcher.matches() && !TableRetriever.FKS_PATH_PATTERN.matcher(path).matches()) {
return documentId(columnNameMatcher.group(1),
columnNameMatcher.group(2),
columnNameMatcher.group(3),
columnNameMatcher.group(4),
columnNameMatcher.group(5));
}
return null;
}
@Override
protected boolean canHandle( String id ) {
return COLUMN_ID_PATTERN.matcher(id).matches();
}
static String documentId( String databaseId,
String catalogId,
String schemaId,
String tableId,
String columnId ) {
return generateId(databaseId, catalogId, schemaId, tableId, COLUMN_PREFIX, columnId);
}
}