Java IteratorUtils.of方法代码示例

import org.apache.tinkerpop.gremlin.util.iterator.IteratorUtils; //导入方法依赖的package包/类
@Override
public Iterator<Put> constructInsertions() {
    final String label = edge.label() != null ? edge.label() : Edge.DEFAULT_LABEL;
    Put put = new Put(ValueUtils.serializeWithSalt(edge.id()));
    put.addColumn(Constants.DEFAULT_FAMILY_BYTES, Constants.TO_BYTES,
            ValueUtils.serialize(edge.inVertex().id()));
    put.addColumn(Constants.DEFAULT_FAMILY_BYTES, Constants.FROM_BYTES,
            ValueUtils.serialize(edge.outVertex().id()));
    put.addColumn(Constants.DEFAULT_FAMILY_BYTES, Constants.LABEL_BYTES,
            ValueUtils.serialize(label));
    put.addColumn(Constants.DEFAULT_FAMILY_BYTES, Constants.CREATED_AT_BYTES,
            ValueUtils.serialize(((HBaseEdge) edge).createdAt()));
    put.addColumn(Constants.DEFAULT_FAMILY_BYTES, Constants.UPDATED_AT_BYTES,
            ValueUtils.serialize(((HBaseEdge) edge).updatedAt()));
    ((HBaseEdge) edge).getProperties().entrySet()
            .forEach(entry -> {
                byte[] bytes = ValueUtils.serializePropertyValue(graph, ElementType.EDGE, label, entry.getKey(), entry.getValue());
                put.addColumn(Constants.DEFAULT_FAMILY_BYTES, Bytes.toBytes(entry.getKey()), bytes);
            });
    return IteratorUtils.of(put);
}
 

import org.apache.tinkerpop.gremlin.util.iterator.IteratorUtils; //导入方法依赖的package包/类
@Override
protected Iterator<Traverser.Admin<S>> standardAlgorithm() throws NoSuchElementException {
    while (true) {
        if (this.repeatTraversal.getEndStep().hasNext()) {
            return this.repeatTraversal.getEndStep();
        } else {
            final Traverser.Admin<S> start = this.starts.next();
            if (doUntil(start, true)) {
                start.resetLoops();
                return IteratorUtils.of(start);
            }
            this.repeatTraversal.addStart(start);
            if (doEmit(start, true)) {
                final Traverser.Admin<S> emitSplit = start.split();
                emitSplit.resetLoops();
                return IteratorUtils.of(emitSplit);
            }
        }
    }
}
 

import org.apache.tinkerpop.gremlin.util.iterator.IteratorUtils; //导入方法依赖的package包/类
@Override
public Iterator<Vertex> vertices(Direction direction) {
  switch (direction) {
    case OUT:
      return IteratorUtils.of(outVertex);
    case IN:
      return IteratorUtils.of(inVertex);
    case BOTH:
      return IteratorUtils.of(outVertex, inVertex);
    default:
      throw new IllegalArgumentException(String.format("Unknown direction %s.", direction));
  }
}
 

import org.apache.tinkerpop.gremlin.util.iterator.IteratorUtils; //导入方法依赖的package包/类
@Override
public Iterator<Vertex> vertices(final Direction direction) {
    if (removed) return Collections.emptyIterator();
    switch (direction) {
        case OUT:
            return IteratorUtils.of(this.outVertex);
        case IN:
            return IteratorUtils.of(this.inVertex);
        default:
            return IteratorUtils.of(this.outVertex, this.inVertex);
    }
}
 

import org.apache.tinkerpop.gremlin.util.iterator.IteratorUtils; //导入方法依赖的package包/类
@Override
public <V> Iterator<Property<V>> properties(final String... propertyKeys) {
    if (null == this.properties) return Collections.emptyIterator();
    if (propertyKeys.length == 1) {
        final Property<V> property = this.properties.get(propertyKeys[0]);
        return null == property ? Collections.emptyIterator() : IteratorUtils.of(property);
    } else
        return (Iterator) this.properties.entrySet().stream().filter(entry -> ElementHelper.keyExists(entry.getKey(), propertyKeys)).map(entry -> entry.getValue()).collect(Collectors.toList()).iterator();
}
 

import org.apache.tinkerpop.gremlin.util.iterator.IteratorUtils; //导入方法依赖的package包/类
@Override
public <U> Iterator<Property<U>> properties(final String... propertyKeys) {
    if (null == this.properties) return Collections.emptyIterator();
    if (propertyKeys.length == 1) {
        final Property<U> property = this.properties.get(propertyKeys[0]);
        return null == property ? Collections.emptyIterator() : IteratorUtils.of(property);
    } else
        return (Iterator) this.properties.entrySet().stream().filter(entry -> ElementHelper.keyExists(entry.getKey(), propertyKeys)).map(entry -> entry.getValue()).collect(Collectors.toList()).iterator();
}
 

import org.apache.tinkerpop.gremlin.util.iterator.IteratorUtils; //导入方法依赖的package包/类
@Override
public <V> Iterator<VertexProperty<V>> properties(String... propertyKeys) {
    if (propertyKeys.length == 0) { // return all properties
        return (Iterator) specificKeys.stream().map(key -> property(key)).filter(vp -> vp.isPresent()).iterator();
    } else if (propertyKeys.length == 1) { // treating as special case for performance
        VertexProperty<V> ret = property(propertyKeys[0]);
        if (ret.isPresent()) {
            return IteratorUtils.of(ret);
        } else {
            return Collections.emptyIterator();
        }
    } else {
        return Arrays.stream(propertyKeys).map(key -> (VertexProperty<V>) property(key)).filter(vp -> vp.isPresent()).iterator();
    }
}
 

import org.apache.tinkerpop.gremlin.util.iterator.IteratorUtils; //导入方法依赖的package包/类
@Override
public <V> Iterator<Property<V>> properties(String... propertyKeys) {
    if (propertyKeys.length == 0) {
        return (Iterator) specificKeys.stream().map(key -> property(key)).filter(vp -> vp.isPresent()).iterator();
    } else if (propertyKeys.length == 1) { // treating as special case for performance
        return IteratorUtils.of(property(propertyKeys[0]));
    } else {
        return Arrays.stream(propertyKeys).map(key -> (Property<V>) property(key)).filter(vp -> vp.isPresent()).iterator();
    }
}
 

import org.apache.tinkerpop.gremlin.util.iterator.IteratorUtils; //导入方法依赖的package包/类
@Override
public Iterator<Vertex> vertices(final Direction direction) {
    switch (direction) {
        case OUT:
            return IteratorUtils.of(this.outVertex);
        case IN:
            return IteratorUtils.of(this.inVertex);
        default:
            return IteratorUtils.of(this.outVertex, this.inVertex);
    }
}
 

import org.apache.tinkerpop.gremlin.util.iterator.IteratorUtils; //导入方法依赖的package包/类
@Override
public Iterator<Put> constructInsertions() {
    Put put = new Put(graph.getLabelMetadataModel().serialize(label.key()));
    put.addColumn(Constants.DEFAULT_FAMILY_BYTES, Constants.CREATED_AT_BYTES,
            ValueUtils.serialize(label.createdAt()));
    put.addColumn(Constants.DEFAULT_FAMILY_BYTES, Constants.UPDATED_AT_BYTES,
            ValueUtils.serialize(label.updatedAt()));
    put.addColumn(Constants.DEFAULT_FAMILY_BYTES, Bytes.toBytes(propertyKey),
            ValueUtils.serialize(type.getCode()));
    return IteratorUtils.of(put);
}
 

import org.apache.tinkerpop.gremlin.util.iterator.IteratorUtils; //导入方法依赖的package包/类
@Override
public Iterator<Vertex> vertices(final Direction direction) {
    if (direction.equals(Direction.OUT))
        return IteratorUtils.of(this.outVertex);
    else if (direction.equals(Direction.IN))
        return IteratorUtils.of(this.inVertex);
    else
        return IteratorUtils.of(this.outVertex, this.inVertex);
}
 

import org.apache.tinkerpop.gremlin.util.iterator.IteratorUtils; //导入方法依赖的package包/类
@Override
public Iterator<Put> constructInsertions() {
    Put put = new Put(graph.getIndexMetadataModel().serialize(index.key()));
    put.addColumn(Constants.DEFAULT_FAMILY_BYTES, Constants.UNIQUE_BYTES,
            ValueUtils.serialize(index.isUnique()));
    put.addColumn(Constants.DEFAULT_FAMILY_BYTES, Constants.INDEX_STATE_BYTES,
            ValueUtils.serialize(index.state().toString()));
    put.addColumn(Constants.DEFAULT_FAMILY_BYTES, Constants.CREATED_AT_BYTES,
            ValueUtils.serialize(index.createdAt()));
    put.addColumn(Constants.DEFAULT_FAMILY_BYTES, Constants.UPDATED_AT_BYTES,
            ValueUtils.serialize(index.updatedAt()));
    return IteratorUtils.of(put);
}
 

import org.apache.tinkerpop.gremlin.util.iterator.IteratorUtils; //导入方法依赖的package包/类
@Override
public Iterator<Mutation> constructMutations() {
    Put put = new Put(graph.getIndexMetadataModel().serialize(index.key()));
    put.addColumn(Constants.DEFAULT_FAMILY_BYTES, Constants.INDEX_STATE_BYTES,
            ValueUtils.serialize(index.state().toString()));
    put.addColumn(Constants.DEFAULT_FAMILY_BYTES, Constants.UPDATED_AT_BYTES,
            ValueUtils.serialize(index.updatedAt()));
    return IteratorUtils.of(put);
}
 

import org.apache.tinkerpop.gremlin.util.iterator.IteratorUtils; //导入方法依赖的package包/类
@Override
public Iterator<Mutation> constructMutations() {
    byte[] bytes = ValueUtils.serializePropertyValue(graph, ((HBaseElement) element).getElementType(), element.label(), key, value);
    Put put = new Put(ValueUtils.serializeWithSalt(element.id()));
    put.addColumn(Constants.DEFAULT_FAMILY_BYTES, Bytes.toBytes(key), bytes);
    put.addColumn(Constants.DEFAULT_FAMILY_BYTES, Constants.UPDATED_AT_BYTES,
            ValueUtils.serialize(((HBaseElement) element).updatedAt()));
    return IteratorUtils.of(put);
}
 

import org.apache.tinkerpop.gremlin.util.iterator.IteratorUtils; //导入方法依赖的package包/类
@Override
public Iterator<Mutation> constructMutations() {
    Increment incr = new Increment(ValueUtils.serializeWithSalt(element.id()));
    incr.addColumn(Constants.DEFAULT_FAMILY_BYTES, Bytes.toBytes(key), value);
    Put put = new Put(ValueUtils.serializeWithSalt(element.id()));
    put.addColumn(Constants.DEFAULT_FAMILY_BYTES, Constants.UPDATED_AT_BYTES,
            ValueUtils.serialize(((HBaseElement) element).updatedAt()));
    return IteratorUtils.of(incr, put);
}