Examples with LoopEndNode org.knime.core.node.workflow.LoopEndNode used on opensource projects

Example 1 with LoopEndNode

use of org.knime.core.node.workflow.LoopEndNode in project knime-core by knime.

the class StepLoopAction method internalCalculateEnabled.

/**
 * @return <code>true</code>, if just one loop end node part is selected
 *         which is executable and a loop is in progress.
 *
 * @see org.eclipse.gef.ui.actions.WorkbenchPartAction#calculateEnabled()
 */
@Override
protected boolean internalCalculateEnabled() {
    NodeContainerEditPart[] parts = getSelectedParts(NodeContainerEditPart.class);
    if (parts.length != 1) {
        return false;
    }
    // enabled if the one selected node is a configured and "in progress"
    // LoopEndNode
    NodeContainerUI nc = parts[0].getNodeContainer();
    if (Wrapper.wraps(nc, NativeNodeContainer.class)) {
        NativeNodeContainer nnc = Wrapper.unwrap(nc, NativeNodeContainer.class);
        if (nnc.isModelCompatibleTo(LoopEndNode.class) && nnc.getLoopStatus().equals(LoopStatus.PAUSED)) {
            // either the node is paused...
            return true;
        }
        WorkflowManager wm = getEditor().getWorkflowManager().get();
        if (wm.canExecuteNodeDirectly(nc.getID())) {
            // ...or we can execute it (then this will be the first step)
            return true;
        }
    }
    return false;
}

Example 2 with LoopEndNode

use of org.knime.core.node.workflow.LoopEndNode in project knime-core by knime.

the class NodeModel method continueLoop.

// ////////////////////////////////////////
// Loop Support...
// 
// TODO: maybe all of this should be moved into an adaptor class
// "LoopNodeModelAdapter" which keeps the node's role and all of
// the loop specific stuff? Later...
// 
// ////////////////////////////////////////
/**
 * Informs WorkflowManager after execute to continue the loop.
 * Call by the end of the loop! This will result in both
 * this Node as well as the creator of the FlowLoopContext to be
 * queued for execution once again. In this case the node can return
 * an empty table after execution.
 *
 * Called on LoopTail Node's only.
 */
protected final void continueLoop() {
    if (!(this instanceof LoopEndNode)) {
        throw new IllegalStateException("continueLoop called from non-end node (Coding Error)!");
    }
    FlowLoopContext slc = m_flowObjectStack.peek(FlowLoopContext.class);
    if (slc != null && slc.isInactiveScope()) {
        m_logger.coding("Encountered an inactive FlowLoopContext in continueLoop.");
        // continue with historically "correct" solution:
        slc = m_flowObjectStack.peekScopeContext(FlowLoopContext.class, false);
    }
    if (slc == null) {
        // wrong wiring of the pipeline: head seems to be missing!
        throw new IllegalStateException("Missing Loop Start in Pipeline!");
    }
    m_loopContext = slc;
// note that the WFM will set the tail ID so we can retrieve it
// in the head node!
}

Example 3 with LoopEndNode

use of org.knime.core.node.workflow.LoopEndNode in project knime-core by knime.

the class ResumeLoopAction method internalCalculateEnabled.

/**
 * @return <code>true</code>, if just one loop end node part is selected
 *         which is executable and a loop is in progress.
 *
 * @see org.eclipse.gef.ui.actions.WorkbenchPartAction#calculateEnabled()
 */
@Override
protected boolean internalCalculateEnabled() {
    NodeContainerEditPart[] parts = getSelectedParts(NodeContainerEditPart.class);
    if (parts.length != 1) {
        return false;
    }
    // enabled if the one selected node is a configured and "in progress"
    // LoopEndNode
    NodeContainerUI nc = parts[0].getNodeContainer();
    if (Wrapper.wraps(nc, NativeNodeContainer.class)) {
        NativeNodeContainer nnc = Wrapper.unwrap(nc, NativeNodeContainer.class);
        if (nnc.isModelCompatibleTo(LoopEndNode.class) && nnc.getLoopStatus().equals(LoopStatus.PAUSED)) {
            return true;
        }
    }
    return false;
}