FileBuildParameters.java

package hudson.plugins.parameterizedtrigger;

import hudson.EnvVars;
import hudson.Extension;
import hudson.FilePath;
import hudson.model.AbstractBuild;
import hudson.model.Action;
import hudson.model.Descriptor;
import hudson.model.ParameterValue;
import hudson.model.ParametersAction;
import hudson.model.StringParameterValue;
import hudson.model.TaskListener;

import java.io.IOException;
import java.util.ArrayList;
import java.util.List;
import java.util.Map;
import java.util.Properties;

import org.apache.tools.ant.filters.StringInputStream;
import org.kohsuke.stapler.DataBoundConstructor;

public class FileBuildParameters extends AbstractBuildParameters {

	private final String propertiesFile;

	@DataBoundConstructor
	public FileBuildParameters(String propertiesFile) {
		this.propertiesFile = propertiesFile;
	}

	public Action getAction(AbstractBuild<?,?> build, TaskListener listener)
			throws IOException, InterruptedException {

		EnvVars env = build.getEnvironment(listener);

		String resolvedPropertiesFile = env.expand(propertiesFile);
		FilePath f = build.getWorkspace().child(resolvedPropertiesFile);
		if (!f.exists()) {
			listener
					.getLogger()
					.println(
							"[parameterizedtrigger] Could not trigger downstream project, as properties file"
									+ resolvedPropertiesFile
									+ " did not exist.");
			return null;
		}

		String s = f.readToString();
		s = env.expand(s);
		Properties p = new Properties();
		p.load(new StringInputStream(s));

		List<ParameterValue> values = new ArrayList<ParameterValue>();
		for (Map.Entry<Object, Object> entry : p.entrySet()) {
			values.add(new StringParameterValue(entry.getKey().toString(),
					entry.getValue().toString()));
		}

		return new ParametersAction(values);

	}

	public String getPropertiesFile() {
		return propertiesFile;
	}

	@Extension
	public static class DescriptorImpl extends Descriptor<AbstractBuildParameters> {
		@Override
		public String getDisplayName() {
			return "Parameters from properties file";
		}
	}

}