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

There is a newer version: 2.11.0

package io.konig.formula.builder;

/*
 * #%L
 * Konig Core
 * %%
 * Copyright (C) 2015 - 2018 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 org.openrdf.model.URI;

import io.konig.core.Term;
import io.konig.core.impl.BasicContext;
import io.konig.formula.ConditionalOrExpression;
import io.konig.formula.Direction;
import io.konig.formula.DirectionStep;
import io.konig.formula.LocalNameTerm;
import io.konig.formula.PathExpression;

public class PathBuilder {

	private T parent;
	private PathExpression path;
	private ConditionalOrExpression wrapper;

	public PathBuilder(T parent) {
		this.parent = parent;
		path = new PathExpression();
		wrapper = ConditionalOrExpression.wrap(path);
		wrapper.setContext(new BasicContext(null));
		
	}
	
	public PathBuilder out(URI predicate) {
		wrapper.getContext().add(new Term(predicate.getLocalName(), predicate.stringValue()));
		path.add(new DirectionStep(Direction.OUT, new LocalNameTerm(wrapper.getContext(), predicate.getLocalName())));
		return this;
	}
	
	public PathBuilder in(URI predicate) {
		wrapper.getContext().add(new Term(predicate.getLocalName(), predicate.stringValue()));
		path.add(new DirectionStep(Direction.IN, new LocalNameTerm(wrapper.getContext(), predicate.getLocalName())));
		return this;
	}
	
	public T endPath() {
		parent.setExpression(ConditionalOrExpression.wrap(path));
		return parent;
	}
	
}