it.tidalwave.semantic.io.spi.StatementUnmarshallerSupport Maven / Gradle / Ivy
/***********************************************************************************************************************
*
* blueBill Core - open source birding
* Copyright (C) 2009-2011 by Tidalwave s.a.s. (http://www.tidalwave.it)
*
***********************************************************************************************************************
*
* 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.
*
***********************************************************************************************************************
*
* WWW: http://bluebill.tidalwave.it
* SCM: https://kenai.com/hg/bluebill~core-src
*
**********************************************************************************************************************/
package it.tidalwave.semantic.io.spi;
import it.tidalwave.semantic.Property;
import org.openrdf.model.Statement;
import javax.annotation.CheckForNull;
import javax.annotation.Nonnull;
import java.util.ArrayList;
import java.util.List;
import it.tidalwave.util.Id;
import it.tidalwave.util.NotFoundException;
import org.openrdf.model.Literal;
import org.openrdf.model.vocabulary.XMLSchema;
/***********************************************************************************************************************
*
* @author Fabrizio Giudici
* @version $Id$
*
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public abstract class StatementUnmarshallerSupport implements StatementUnmarshaller
{
/*******************************************************************************************************************
*
*
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@Nonnull
protected Statement findStatementWithPredicate (final @Nonnull List statements,
final @Nonnull Id predicate)
throws NotFoundException
{
return NotFoundException.throwWhenEmpty(findStatementsWithPredicate(statements, predicate),
"No statements with predicate %s in subject %s",
predicate, statements.get(0).getSubject()).
get(0);
}
/*******************************************************************************************************************
*
*
******************************************************************************************************************/
@Nonnull
protected List findStatementsWithPredicate (final @Nonnull List statements,
final @Nonnull Id predicate)
{
final List result = new ArrayList();
for (final Statement statement : statements)
{
if (statement.getPredicate().stringValue().equals(predicate.stringValue()))
{
result.add(statement);
}
}
return result;
}
/*******************************************************************************************************************
*
*
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@CheckForNull
protected Object getLiteral (final List statements, final @Nonnull Id predicate)
{
try
{
return deserialize((Literal)findStatementWithPredicate(statements, predicate).getObject());
}
catch (NotFoundException e)
{
throw new RuntimeException("Cannot get literal for predicate: " + predicate);
}
}
/*******************************************************************************************************************
*
*
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@CheckForNull
protected Object findEntity (final @Nonnull Context context,
final @Nonnull List statements,
final @Nonnull Id predicate)
{
try
{
return context.find(findStatementWithPredicate(statements, predicate).getObject());
}
catch (NotFoundException e)
{
return null;
}
}
/*******************************************************************************************************************
*
*
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protected void addCapabilities (final @Nonnull List