Examples with VirtualSubNodeExchange org.knime.core.node.workflow.virtual.subnode.VirtualSubNodeExchange used on opensource projects

Example 1 with VirtualSubNodeExchange

use of org.knime.core.node.workflow.virtual.subnode.VirtualSubNodeExchange in project knime-core by knime.

the class SubNodeContainer method setVirtualOutputIntoOutport.

/**
 * Copies data from virtual output node into m_outputs, notifies state listeners if not
 * processing call from parent.
 * @param newState State of the internal WFM to decide whether to publish ports and/or specs.
 */
@SuppressWarnings("null")
private boolean setVirtualOutputIntoOutport(final InternalNodeContainerState newState) {
    // retrieve results and copy to outports
    final VirtualSubNodeOutputNodeModel virtualOutNodeModel = getVirtualOutNodeModel();
    final boolean isInactive = getVirtualOutNode().isInactive();
    final VirtualSubNodeExchange outputExchange = virtualOutNodeModel.getOutputExchange();
    // put objects into output if state of WFM is executed
    boolean publishObjects = newState.isExecuted();
    // publishObjects implies that output node has data or is inactive
    assert !publishObjects || (isInactive || (outputExchange != null && outputExchange.getPortObjects() != null)) : String.format("output node must have data or be inactive, status: %s, inactive: %b, exhange is null: %b, " + "exchange content is null: %s", newState, isInactive, outputExchange == null, outputExchange == null ? "<invalid>" : String.valueOf(outputExchange.getPortObjects() == null));
    boolean publishSpecs = (isInactive || outputExchange != null) && (newState.isConfigured() || newState.isExecuted() || newState.isExecutionInProgress());
    boolean changed = false;
    for (int i = 1; i < m_outputs.length; i++) {
        // not publish spec:     null output
        // inactive output node: inactive branch port object
        // otherwise:            use data from output node
        final PortObjectSpec spec = publishSpecs ? (isInactive ? InactiveBranchPortObjectSpec.INSTANCE : outputExchange.getPortSpecs()[i - 1]) : null;
        changed = m_outputs[i].setSpec(spec) || changed;
        final PortObject object = publishObjects ? (isInactive ? InactiveBranchPortObject.INSTANCE : outputExchange.getPortObjects()[i - 1]) : null;
        changed = m_outputs[i].setObject(object) || changed;
    }
    final PortObjectSpec spec = publishSpecs ? (isInactive ? InactiveBranchPortObjectSpec.INSTANCE : FlowVariablePortObjectSpec.INSTANCE) : null;
    changed = m_outputs[0].setSpec(spec) || changed;
    final PortObject object = publishObjects ? (isInactive ? InactiveBranchPortObject.INSTANCE : FlowVariablePortObject.INSTANCE) : null;
    changed = m_outputs[0].setObject(object) || changed;
    final FlowObjectStack outgoingFlowObjectStack = getOutgoingFlowObjectStack();
    // TODO API to remove variables from stack, then remove variables no longer in output node and update "changed"
    if (publishObjects && !isInactive) {
        for (FlowVariable f : outputExchange.getFlowVariables()) {
            outgoingFlowObjectStack.push(f.cloneAndUnsetOwner());
        }
    } else {
        // outgoing stack may be null if reset is called twice in a row (or once but no configure was called)
        if (outgoingFlowObjectStack != null) {
            while (!outgoingFlowObjectStack.isEmpty()) {
                outgoingFlowObjectStack.pop(FlowObject.class);
            }
        }
    }
    if (changed && !m_isPerformingActionCalledFromParent) {
        // updates port views
        notifyStateChangeListeners(new NodeStateEvent(this));
    }
    return changed;
}