it.unibz.inf.ontop.sesame.SesameBindingSet Maven / Gradle / Ivy

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This is the Sesame API implementation based on Quest
There is a newer version: 1.18.1
package it.unibz.inf.ontop.sesame;

/*
 * #%L
 * ontop-quest-sesame
 * %%
 * Copyright (C) 2009 - 2014 Free University of Bozen-Bolzano
 * %%
 * 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.
 * #L%
 */

import it.unibz.inf.ontop.model.Constant;
import it.unibz.inf.ontop.model.ObjectConstant;
import it.unibz.inf.ontop.model.TupleResultSet;
import it.unibz.inf.ontop.model.ValueConstant;
import it.unibz.inf.ontop.sesame.SesameHelper;
import org.openrdf.model.Value;
import org.openrdf.query.Binding;
import org.openrdf.query.BindingSet;
import org.openrdf.query.impl.BindingImpl;

import java.util.Iterator;
import java.util.LinkedList;
import java.util.List;
import java.util.Set;

public class SesameBindingSet implements BindingSet {

    private static final long serialVersionUID = -8455466574395305166L;
    private TupleResultSet set = null;
    private int count = 0;
    private final Set bindingnames;
//	private List signature;

    private final SesameHelper helper = new SesameHelper();

    public SesameBindingSet(TupleResultSet set, Set bindingnames) {
        this.bindingnames = bindingnames;
//		this.signature = signature;
        this.set = set;
        this.count = bindingnames.size();

    }

    @Override
    public Binding getBinding(String bindingName) {
        // return the Binding with bindingName
        return createBinding(bindingName);
    }

    @Override
    public Set getBindingNames() {
        return bindingnames;
    }

    @Override
    public Value getValue(String bindingName) {
        return createBinding(bindingName).getValue();
    }

    private Binding createBinding(String bindingName) {
        Value value = null;
        try {
            if (hasBinding(bindingName)) {
//				int column = set.getSignature().indexOf(bindingName) + 1;
                Constant c = set.getConstant(bindingName);
                if (c == null) {
                    return null;
                }
                else {
                    if (c instanceof ValueConstant) {
                        value = SesameHelper.getLiteral((ValueConstant)c);
                    }
                    else {
                        value = SesameHelper.getResource((ObjectConstant)c);
                    }
                }
            }
            return new BindingImpl(bindingName, value);
        }
        catch (Exception e) {
            throw new RuntimeException(e);
        }
//		return null;
    }

    @Override
    public boolean hasBinding(String bindingName) {
        return bindingnames.contains(bindingName);
//		try {
//			return set.getSignature().contains(bindingName);
//		} catch (Exception e) {
//			e.printStackTrace();
//		}
//		return false;
    }

    @Override
    public Iterator iterator() {

        List allBindings = new LinkedList();
        List bindings;
        try {
            bindings = set.getSignature();
            for (String s : bindings)
                allBindings.add(createBinding(s));
        } catch (Exception e) {
            e.printStackTrace();
        }

        return allBindings.iterator();
    }

    @Override
    public int size() {
        return count;
    }
}