/*
* JBoss, Home of Professional Open Source.
* See the COPYRIGHT.txt file distributed with this work for information
* regarding copyright ownership. Some portions may be licensed
* to Red Hat, Inc. under one or more contributor license agreements.
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
* 02110-1301 USA.
*/
package org.teiid.translator.simpledb;
import java.util.Arrays;
import java.util.List;
import org.teiid.language.visitor.SQLStringVisitor;
import org.teiid.metadata.*;
import org.teiid.metadata.BaseColumn.NullType;
import org.teiid.translator.MetadataProcessor;
import org.teiid.translator.TranslatorException;
import org.teiid.translator.TypeFacility;
import org.teiid.translator.simpledb.api.SimpleDBConnection;
import org.teiid.translator.simpledb.api.SimpleDBConnection.SimpleDBAttribute;
public class SimpleDBMetadataProcessor implements MetadataProcessor<SimpleDBConnection> {
public static final String ITEM_NAME = SimpleDBConnection.ITEM_NAME;
private static final String DISPLAY_ITEM_NAME = "ItemName"; //$NON-NLS-1$
/**
* As SimpleDB does not provide any way to obtain all attribute names for
* given domain (one can query only attribute names for single item) and
* querrying all items in domain to get complete set of attribute names
* would be very slow and resource consuming, this approach has been
* selected: For each domain only first item is queried for attribute names
* and metadata are created using this information. Thus first item in
* domain should have as much attributes as possible.
* @see org.teiid.translator.MetadataProcessor#process(org.teiid.metadata.MetadataFactory, java.lang.Object)
*/
@Override
public void process(MetadataFactory metadataFactory, SimpleDBConnection connection) throws TranslatorException {
List<String> domains = connection.getDomains();
for (String domain : domains) {
Table table = metadataFactory.addTable(domain);
table.setSupportsUpdate(true);
Column itemName = metadataFactory.addColumn(DISPLAY_ITEM_NAME, TypeFacility.RUNTIME_NAMES.STRING, table);
itemName.setUpdatable(true);
itemName.setNameInSource(ITEM_NAME);
itemName.setNullType(NullType.No_Nulls);
metadataFactory.addPrimaryKey("PK0", Arrays.asList(DISPLAY_ITEM_NAME), table); //$NON-NLS-1$
for (SimpleDBAttribute attribute : connection.getAttributeNames(domain)) {
Column column = null;
if (attribute.hasMultipleValues()) {
column = metadataFactory.addColumn(attribute.getName(), TypeFacility.RUNTIME_NAMES.STRING+"[]", table); //$NON-NLS-1$
}
else {
column = metadataFactory.addColumn(attribute.getName(), TypeFacility.RUNTIME_NAMES.STRING, table);
}
column.setUpdatable(true);
column.setNullType(NullType.Nullable);
}
}
}
public static String getName(AbstractMetadataRecord record) {
return SQLStringVisitor.getShortName(SQLStringVisitor.getRecordName(record));
}
public static boolean isItemName(Column column) {
return SimpleDBMetadataProcessor.getName(column).equalsIgnoreCase(SimpleDBMetadataProcessor.ITEM_NAME);
}
public static boolean isItemName(String name) {
return name.equalsIgnoreCase(SimpleDBMetadataProcessor.ITEM_NAME);
}
}