com.icosilune.fn.nodes.SinkNode.java Source code

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Here is the source code for com.icosilune.fn.nodes.SinkNode.java

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package com.icosilune.fn.nodes;

import com.google.common.collect.ImmutableMap;
import com.icosilune.fn.EvaluationContext;
import com.icosilune.fn.FnType;
import java.util.ArrayList;
import java.util.List;
import java.util.Map;

/**
 * A node that has one input and no outputs, which can be used for display,
 * or transmission to some other destination.
 */
public class SinkNode extends AbstractNode {

    public interface SinkNodeListener {
        public void updated(Object value);
    }

    private static final String IN_NAME = "in";
    private final FnType type;
    private final List<SinkNodeListener> listeners = new ArrayList<>();
    private Object value = null;

    public SinkNode(NodeGraph graph, FnType type) {
        super(graph);
        this.type = type;
    }

    /**
     * Get the value of the sink node.
     */
    public Object getValue() {
        return value;
    }

    @Override
    public Map<String, Socket> getInputSockets() {
        return ImmutableMap.of(IN_NAME, Socket.create(IN_NAME, type, Socket.SocketType.INPUT));
    }

    @Override
    public Map<String, Socket> getOutputSockets() {
        return ImmutableMap.of();
    }

    @Override
    public String getName() {
        return "sink";
    }

    @Override
    public boolean isContextDependent() {
        return false;
    }

    @Override
    public void evaluate(EvaluationContext context) {
        this.value = readInputs().get(IN_NAME);

        for (SinkNodeListener listener : listeners) {
            listener.updated(value);
        }
    }

    public void addListener(SinkNodeListener listener) {
        listeners.add(listener);
    }
}