/*
* 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 schema metadata to connector documents.
*
* @author Horia Chiorean (hchiorea@redhat.com)
*/
public class SchemaRetriever extends AbstractMetadataRetriever {
private static final Pattern SCHEMA_PATH_PATTERN = Pattern.compile("/([^/]+)/([^/]+)/([^/]+)");
private static final Pattern SCHEMA_ID_PATTERN = Pattern.compile("([^@]+)@([^@]+)@([^@]+)");
static final Pattern TABLES_PATH_PATTERN = Pattern.compile(SCHEMA_PATH_PATTERN.pattern() + "/tables");
static final String TABLES_CONTAINER = "tables";
private static final Pattern TABLES_ID_PATTERN = Pattern.compile(SCHEMA_ID_PATTERN.pattern() + "@" + TABLES_CONTAINER);
static final Pattern PROCEDURES_PATH_PATTERN = Pattern.compile(SCHEMA_PATH_PATTERN.pattern() + "/procedures");
static final String PROCEDURES_CONTAINER = "procedures";
private static final Pattern PROCEDURES_ID_PATTERN = Pattern.compile(SCHEMA_ID_PATTERN + "@" + PROCEDURES_CONTAINER);
protected SchemaRetriever( JdbcMetadataConnector connector ) {
super(connector);
}
@Override
protected Document getDocumentById( String id,
DocumentWriter writer,
Connection connection ) {
//the request is for a named/default schema
String schemaId = schemaIdFrom(id, SCHEMA_ID_PATTERN);
if (schemaId != null) {
String catalogId = catalogIdFrom(id, SCHEMA_ID_PATTERN);
return createDocumentForSchema(writer, catalogId, schemaId);
}
//the request is for all the tables of a schema
String schemaIdFromTable = schemaIdFrom(id, TABLES_ID_PATTERN);
if (schemaIdFromTable != null) {
String catalogId = catalogIdFrom(id, TABLES_ID_PATTERN);
return createDocumentForAllTables(writer, connection, catalogId, schemaIdFromTable);
}
//the request is for all the procedures of a schema
String schemaIdFromProcedures = schemaIdFrom(id, PROCEDURES_ID_PATTERN);
if (schemaIdFromProcedures != null) {
String catalogId = catalogIdFrom(id, PROCEDURES_ID_PATTERN);
return createDocumentForAllProcedures(writer, connection, catalogId, schemaIdFromProcedures);
}
return null;
}
private Document createDocumentForAllProcedures( DocumentWriter writer,
Connection connection,
String catalogId,
String schemaId ) {
writer.setPrimaryType(JcrNtLexicon.UNSTRUCTURED);
writer.addMixinType(JdbcMetadataLexicon.PROCEDURES);
writer.setParent(SchemaRetriever.documentId(DatabaseRetriever.ID, catalogId, schemaId, false, false));
String catalog = catalogId;
if (catalog.equalsIgnoreCase(connector.getDefaultCatalogName())) {
catalog = null;
}
String schema = schemaId;
if (schema.equalsIgnoreCase(connector.getDefaultSchemaName())) {
schema = null;
}
List<ProcedureMetadata> procedures = connector.getMetadataCollector().getProcedures(connection, catalog, schema, null);
if (!procedures.isEmpty()) {
for (ProcedureMetadata procedureMetadata : procedures) {
String procedureId = ProcedureRetriever.documentId(DatabaseRetriever.ID, catalogId, schemaId,
procedureMetadata.getName());
writer.addChild(procedureId, procedureMetadata.getName());
}
}
return writer.document();
}
private Document createDocumentForAllTables( DocumentWriter writer,
Connection connection,
String catalogId,
String schemaId ) {
writer.setPrimaryType(JcrNtLexicon.UNSTRUCTURED);
writer.addMixinType(JdbcMetadataLexicon.TABLES);
writer.setParent(SchemaRetriever.documentId(DatabaseRetriever.ID, catalogId, schemaId, false, false));
String catalog = catalogId;
if (catalog.equalsIgnoreCase(connector.getDefaultCatalogName())) {
catalog = null;
}
String schema = schemaId;
if (schema.equalsIgnoreCase(connector.getDefaultSchemaName())) {
schema = null;
}
List<TableMetadata> tables = connector.getMetadataCollector().getTables(connection, catalog, schema, null);
if (!tables.isEmpty()) {
for (TableMetadata tableMetadata : tables) {
String tableId = TableRetriever.documentId(DatabaseRetriever.ID, catalogId, schemaId,
tableMetadata.getName(),
false);
writer.addChild(tableId, tableMetadata.getName());
}
}
return writer.document();
}
private Document createDocumentForSchema( DocumentWriter writer,
String catalogId,
String schemaId ) {
writer.setPrimaryType(JcrNtLexicon.UNSTRUCTURED);
writer.addMixinType(JdbcMetadataLexicon.SCHEMA);
writer.setParent(CatalogRetriever.documentId(DatabaseRetriever.ID, catalogId));
writer.addChild(documentId(DatabaseRetriever.ID, catalogId, schemaId, true, false), TABLES_CONTAINER);
writer.addChild(documentId(DatabaseRetriever.ID, catalogId, schemaId, false, true), PROCEDURES_CONTAINER);
return writer.document();
}
static String catalogIdFrom( String id,
Pattern pattern ) {
Matcher matcher = pattern.matcher(id);
return matcher.matches() ? matcher.group(2) : null;
}
static String schemaIdFrom( String id,
Pattern pattern ) {
Matcher matcher = pattern.matcher(id);
return matcher.matches() ? matcher.group(3) : null;
}
@Override
protected String idFrom( String path ) {
Matcher namedSchemaMatcher = SCHEMA_PATH_PATTERN.matcher(path);
if (namedSchemaMatcher.matches()) {
return documentId(namedSchemaMatcher.group(1), namedSchemaMatcher.group(2), namedSchemaMatcher.group(3), false,
false);
}
Matcher tablesMatcher = TABLES_PATH_PATTERN.matcher(path);
if (tablesMatcher.matches()) {
return documentId(tablesMatcher.group(1), tablesMatcher.group(2), tablesMatcher.group(3), true, false);
}
Matcher proceduresMatcher = PROCEDURES_PATH_PATTERN.matcher(path);
if (proceduresMatcher.matches()) {
return documentId(proceduresMatcher.group(1), proceduresMatcher.group(2), proceduresMatcher.group(3), false, true);
}
return null;
}
@Override
protected boolean canHandle( String id ) {
return SCHEMA_ID_PATTERN.matcher(id).matches() ||
TABLES_ID_PATTERN.matcher(id).matches() ||
PROCEDURES_ID_PATTERN.matcher(id).matches();
}
static String documentId( String databaseId,
String catalogId,
String schemaId,
boolean onlyTables,
boolean onlyProcedures ) {
String baseId = generateId(databaseId, catalogId, schemaId);
if (onlyTables) {
return generateId(baseId, "tables");
} else if (onlyProcedures) {
return generateId(baseId, "procedures");
} else {
return baseId;
}
}
}