JobByDescription.java

package hudson.plugins.descriptionsetter;

import net.sf.json.JSONObject;

import org.kohsuke.stapler.StaplerRequest;
import org.kohsuke.stapler.StaplerResponse;

import hudson.Extension;
import hudson.model.Action;
import hudson.model.Job;
import hudson.model.JobProperty;
import hudson.model.JobPropertyDescriptor;
import hudson.model.Run;
import hudson.model.Descriptor.FormException;

public class JobByDescription extends JobProperty<Job<?,?>>{

	@Override
	public Action getJobAction(Job<?, ?> job) {
		return new JobByDescriptionAction(owner);
	}

	@Extension
	public static class DescriptorImpl extends JobPropertyDescriptor {

		public DescriptorImpl() {
			super(JobByDescription.class);
		}

		@Override
		public boolean isApplicable(Class<? extends Job> arg0) {
			return true;
		}

		@Override
		public String getDisplayName() {
			return "Allow getting a build by description"; 
		}

		@Override
		public JobProperty<?> newInstance(StaplerRequest req,
				JSONObject formData) throws FormException {
			return new JobByDescription();
		}
		
	}
	
	public static class JobByDescriptionAction implements Action {

		private Job<?, ?> owner;

		public JobByDescriptionAction(Job<?, ?> owner) {
			this.owner = owner;
		}

		public String getDisplayName() {
			return null;
		}

		public String getIconFileName() {
			return null;
		}

		public String getUrlName() {
			return "by-description";
		}
		
	    public Object getDynamic(String token, StaplerRequest req, StaplerResponse rsp) {
	    	for (Run<?,?> run: owner.getBuilds()) {
	    		DescriptionSetterAction action = run.getAction(DescriptionSetterAction.class);
	    		if (action != null && token.equals(action.getDescription())) {
	    			return run;
	    		}
	    	}
	    	
	    	return null;
	    }
		
		
	}

}