ProxyStep.java

package de.galan.verjson.core;

import org.apache.logging.log4j.Logger;

import com.fasterxml.jackson.databind.JsonNode;
import com.google.common.base.Preconditions;

import de.galan.commons.logging.Logr;
import de.galan.verjson.step.ProcessStepException;
import de.galan.verjson.step.Step;


/**
 * Wraps a {@link Step}, adds the assigned source-version and successor.
 *
 * @author daniel
 */
public class ProxyStep implements Step {

	private static final Logger LOG = Logr.get();

	Long sourceVersion;
	Step step;
	Step successor;


	public ProxyStep(Long sourceVersion, Step step) {
		Preconditions.checkNotNull(sourceVersion, "SourceVersion could not be null");
		Preconditions.checkNotNull(step, "Step could not be null");
		this.sourceVersion = sourceVersion;
		this.step = step;
	}


	@Override
	public void process(JsonNode node) throws ProcessStepException {
		LOG.debug("Processing {}/{}", getSourceVersion(), getStep().getClass().getSimpleName()); // TODO Idea - name annotation for steps for better debugging
		getStep().process(node);
		if (successor != null) {
			successor.process(node);
		}
	}


	public Long getSourceVersion() {
		return sourceVersion;
	}


	protected Step getStep() {
		return step;
	}


	public void setSuccessor(ProxyStep successor) {
		this.successor = successor;
	}


	@Override
	public String toString() {
		return "ProxyStep " + getSourceVersion() + "/" + getStep().getClass().getSimpleName();
	}

}