org.apache.edgent.graph.spi.AbstractGraph Maven / Gradle / Ivy
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to you under the Apache License, Version 2.0 (the
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*/
package org.apache.edgent.graph.spi;
import java.util.ArrayList;
import java.util.List;
import org.apache.edgent.function.Predicate;
import org.apache.edgent.function.Supplier;
import org.apache.edgent.graph.Connector;
import org.apache.edgent.graph.Graph;
import org.apache.edgent.graph.Vertex;
import org.apache.edgent.oplet.Oplet;
import org.apache.edgent.oplet.core.Peek;
import org.apache.edgent.oplet.core.Source;
/**
* A skeletal implementation of the {@link Graph} interface,
* to minimize the effort required to implement the interface.
*
* @param unnecessary?
*/
public abstract class AbstractGraph implements Graph {
@Override
public , P> Connector source(N oplet) {
return insert(oplet, 0, 1).getConnectors().get(0);
}
@Override
public , C, P> Connector pipe(Connector output, N oplet) {
Vertex pipeVertex = insert(oplet, 1, 1);
output.connect(pipeVertex, 0);
return pipeVertex.getConnectors().get(0);
}
@SuppressWarnings({ "unchecked", "rawtypes" })
@Override
public void peekAll(Supplier> supplier, Predicate> select) {
// Select vertices which satisfy the specified predicate
List> vertices = new ArrayList<>();
for (Vertex v : getVertices()) {
if (select.test(v)) {
vertices.add(v);
}
}
// Insert peek oplets on isConnected() output ports
for (Vertex v : vertices) {
List> connectors = v.getConnectors();
for (Connector c : connectors) {
if (c.isConnected()) {
Peek oplet = supplier.get();
c.peek((Peek) oplet);
}
}
}
}
}