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A library for core classes (Graph, Vertex, Edge, etc.)

There is a newer version: 2.11.0

package io.konig.shacl;

/*
 * #%L
 * Konig Core
 * %%
 * Copyright (C) 2015 - 2017 Gregory McFall
 * %%
 * 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 java.util.ArrayList;

import org.openrdf.model.URI;

import io.konig.annotation.RdfList;
import io.konig.core.KonigException;
import io.konig.formula.Direction;
import io.konig.formula.DirectionStep;
import io.konig.formula.PathExpression;
import io.konig.formula.PathStep;

@RdfList
public class SequencePath extends ArrayList implements PropertyPath {
	private static final long serialVersionUID = 1L;
	
	static public SequencePath fromPathExpression(PathExpression e) throws KonigException {
		SequencePath sequence = new SequencePath();
		for (PathStep step : e.getStepList()) {
			if (step instanceof DirectionStep) {
				DirectionStep dirStep = (DirectionStep) step;
				if (dirStep.getDirection() == Direction.IN) {
					throw new KonigException("Inverse paths not supported: " + e.simpleText());
				}
				URI term = dirStep.getTerm().getIri();
				sequence.add(new PredicatePath(term));
			} else {
				throw new KonigException("Invalid sequence path: " + e.simpleText());
			}
		}
		
		return sequence;
	}
	
	public String toString() {
		StringBuilder builder = new StringBuilder();
		builder.append('(');
		String space = "";
		for (PropertyPath path : this) {
			builder.append(space);
			builder.append(path.toString());
			space = " ";
		}
		builder.append(')');
		return builder.toString();
	}
	
	public PropertyPath getLast() {
		PropertyPath result = null;
		if (!isEmpty()) {
			result = get(size()-1);
			if (result instanceof SequencePath) {
				result = ((SequencePath) result).getLast();
			}
		}
		return result;
	}

}