Java Edge.remove方法代碼示例

import com.tinkerpop.blueprints.Edge; //導入方法依賴的package包/類
public int clearStationOfExchangesOrientDb(Station station) {
    int edgesRemoved = 0;
    OrientGraph graph = null;
    try {
        graph = orientDbService.getFactory().getTx();
        OrientVertex vertexStation = (OrientVertex) graph.getVertexByKey("Station.name", station.getName());
        for (Edge exchange: vertexStation.getEdges(Direction.OUT, "Exchange")) {
            exchange.remove();
            edgesRemoved++;
        };
        
    } catch (Exception e) {
        graph.rollback();
    }
    return edgesRemoved;
}
 

import com.tinkerpop.blueprints.Edge; //導入方法依賴的package包/類
@Test
public void testEdgesExceedCacheSize() {
    // Add a vertex with as many edges as the tx-cache-size. (20000 by default)
    int numEdges = graph.getConfiguration().getTxVertexCacheSize();
    Vertex parentVertex = graph.addVertex(null);
    for (int i = 0; i < numEdges; i++) {
        Vertex childVertex = graph.addVertex(null);
        parentVertex.addEdge("friend", childVertex);
    }
    graph.commit();
    assertEquals(numEdges, Iterables.size(parentVertex.getEdges(Direction.OUT)));

    // Remove an edge.
    Edge edge = parentVertex.getEdges(Direction.OUT).iterator().next();
    edge.remove();

    // Check that getEdges returns one fewer.
    assertEquals(numEdges - 1, Iterables.size(parentVertex.getEdges(Direction.OUT)));

    // Run the same check one more time.
    // This fails! (Expected: 19999. Actual: 20000.)
    assertEquals(numEdges - 1, Iterables.size(parentVertex.getEdges(Direction.OUT)));
}
 

import com.tinkerpop.blueprints.Edge; //導入方法依賴的package包/類
/**
 * The edge label has change. Migrate existing edges.
 */
private void migrateSchemaContainerRootEdges(Vertex schemaRoot) {
	for (Edge edge : schemaRoot.getEdges(Direction.OUT, "HAS_SCHEMA_CONTAINER")) {
		Vertex container = edge.getVertex(Direction.IN);
		schemaRoot.addEdge("HAS_SCHEMA_CONTAINER_ITEM", container);
		edge.remove();
	}
}
 

import com.tinkerpop.blueprints.Edge; //導入方法依賴的package包/類
private void migrateTagFamilies(Vertex project) {
	Vertex tagFamilyRoot = project.getVertices(Direction.OUT, "HAS_TAGFAMILY_ROOT").iterator().next();
	for (Vertex tagFamily : tagFamilyRoot.getVertices(Direction.OUT, "HAS_TAG_FAMILY")) {

		// Check dates
		Object tagFamilyCreationTimeStamp = tagFamily.getProperty("creation_timestamp");
		if (tagFamilyCreationTimeStamp == null) {
			tagFamily.setProperty("creation_timestamp", System.currentTimeMillis());
		}
		Object tagFamilyEditTimeStamp = tagFamily.getProperty("last_edited_timestamp");
		if (tagFamilyEditTimeStamp == null) {
			tagFamily.setProperty("last_edited_timestamp", System.currentTimeMillis());
		}

		// Create a new tag root vertex for the tagfamily and link the tags to this vertex instead to the tag family itself.
		Vertex tagRoot = getGraph().addVertex("class:TagRootImpl");
		tagRoot.setProperty("ferma_type", "com.gentics.mesh.core.data.root.impl.TagRootImpl");
		tagRoot.setProperty("uuid", randomUUID());
		for (Edge tagEdge : tagFamily.getEdges(Direction.OUT, "HAS_TAG")) {
			Vertex tag = tagEdge.getVertex(Direction.IN);
			tagEdge.remove();
			tagRoot.addEdge("HAS_TAG", tag);
			tag.getEdges(Direction.OUT, "HAS_TAGFAMILY_ROOT").forEach(edge -> edge.remove());
			tag.addEdge("HAS_TAGFAMILY_ROOT", tagFamily);
			if (!tag.getEdges(Direction.OUT, "ASSIGNED_TO_PROJECT").iterator().hasNext()) {
				log.error("Tag {" + tag.getProperty("uuid") + " has no project assigned to it. Fixing it...");
				tag.addEdge("ASSIGNED_TO_PROJECT", project);
			}
			Object creationTimeStamp = tag.getProperty("creation_timestamp");
			if (creationTimeStamp == null) {
				tag.setProperty("creation_timestamp", System.currentTimeMillis());
			}
			Object editTimeStamp = tag.getProperty("last_edited_timestamp");
			if (editTimeStamp == null) {
				tag.setProperty("last_edited_timestamp", System.currentTimeMillis());
			}
		}
		tagFamily.addEdge("HAS_TAG_ROOT", tagRoot);
		if (!tagFamily.getEdges(Direction.OUT, "ASSIGNED_TO_PROJECT").iterator().hasNext()) {
			log.error("TagFamily {" + tagFamily.getProperty("uuid") + " has no project assigned to it. Fixing it...");
			tagFamily.addEdge("ASSIGNED_TO_PROJECT", project);
		}

		getOrFixUserReference(tagFamily, "HAS_EDITOR");
		getOrFixUserReference(tagFamily, "HAS_CREATOR");
	}

}
 

import com.tinkerpop.blueprints.Edge; //導入方法依賴的package包/類
public void removeEdge(Edge edge) {
	edge.remove();		
}
 

import com.tinkerpop.blueprints.Edge; //導入方法依賴的package包/類
/**
 * Tests that timestamped edges and properties can be updated
 */
@Test
public void testTimestampedUpdates() {
    clopen(option(GraphDatabaseConfiguration.STORE_META_TIMESTAMPS, "edgestore"), true,
            option(GraphDatabaseConfiguration.STORE_META_TTL, "edgestore"), true);
    final TimeUnit unit = TimeUnit.SECONDS;

    // Transaction 1: Init graph with two vertices, having set "name" and "age" properties
    TitanTransaction tx = graph.buildTransaction().setCommitTime(100, unit).start();
    TitanVertex v1 = tx.addVertex();
    TitanVertex v2 = tx.addVertex();
    TitanProperty p = v1.addProperty("name","xyz");
    p.setProperty("time",15);
    Edge e = v1.addEdge("related",v2);
    e.setProperty("time",25);
    tx.commit();


    tx = graph.buildTransaction().setCommitTime(200, unit).start();
    v1 = (TitanVertex)tx.getVertex(v1);
    assertNotNull(v1);
    p = Iterables.getOnlyElement(v1.getProperties("name"));
    e = Iterables.getOnlyElement(v1.getEdges(Direction.OUT, "related"));
    assertEquals(3, p.getPropertyKeys().size());
    assertEquals(3, p.getPropertyKeys().size());
    p.setProperty("time", 115);
    e.setProperty("time",125);
    tx.commit();

    tx = graph.buildTransaction().setCommitTime(300, unit).start();
    v1 = (TitanVertex)tx.getVertex(v1);
    assertNotNull(v1);
    p = Iterables.getOnlyElement(v1.getProperties("name"));
    e = Iterables.getOnlyElement(v1.getEdges(Direction.OUT, "related"));
    assertEquals(115,p.getProperty("time"));
    assertEquals(125, e.getProperty("time"));
    p.remove();
    e.remove();
    tx.commit();

}
 

import com.tinkerpop.blueprints.Edge; //導入方法依賴的package包/類
protected void removeConnectionsAt2Dobjects() {
	
	// this is a cleanup operation -- if there are connection points
	// for 1d objects that exist at a 2d shape that they are connected
	// to, then remove the connection
	
	for (ShapeData shape: shapes) {
		
		if (!shape.is1d())
			continue;
		
		Set<Long> collected2dObjects = null;
		
		// get the connection point from the edge properties
		for (Edge edge: shape.vertex.getEdges(Direction.BOTH)) {
			Double x = edge.getProperty("x");
			if (x == null)
				continue;
			
			Double y = edge.getProperty("y");
			
			// ok, the other end must be a 1d object. Find the object.
			// Find all 2d objects that I'm connected to, and see if the
			// other object is connected to any of them.
			
			if (collected2dObjects == null)
				collected2dObjects = collect2dObjects(shape.vertex);
			
			// if both connected to the same object, see if the x/y overlaps
			Vertex other = edge.getVertex(Direction.IN);
			if (other == shape.vertex)
				other = edge.getVertex(Direction.OUT);
			
			Set<Long> other2dObjects = collect2dObjects(other);
			
			for (Long o: other2dObjects) {
				if (collected2dObjects.contains(o)) {
					ShapeData sd = getShape(o);
					if (sd.bounds.intersects(x - 0.00001, y - 0.00001, 0.00002, 0.00002)) {
						// remove edge if it overlaps
						edge.remove();
					}
				}
			}
		}
	}
}