bundleplugin/src/main/java/aQute/lib/osgi/resource/ResourceBuilder.java

package aQute.lib.osgi.resource;

import java.util.LinkedList;
import java.util.List;

import org.osgi.resource.Capability;
import org.osgi.resource.Requirement;
import org.osgi.resource.Resource;

public class ResourceBuilder {

	private final ResourceImpl		resource		= new ResourceImpl();
	private final List<Capability>	capabilities	= new LinkedList<Capability>();
	private final List<Requirement>	requirements	= new LinkedList<Requirement>();

	private boolean					built			= false;

	public ResourceBuilder addCapability(CapReqBuilder builder) {
		if (built)
			throw new IllegalStateException("Resource already built");

		Capability cap = builder.setResource(resource).buildCapability();
		capabilities.add(cap);

		return this;
	}

	public ResourceBuilder addRequirement(CapReqBuilder builder) {
		if (built)
			throw new IllegalStateException("Resource already built");

		Requirement req = builder.setResource(resource).buildRequirement();
		requirements.add(req);

		return this;
	}

	public Resource build() {
		if (built)
			throw new IllegalStateException("Resource already built");
		built = true;

		resource.setCapabilities(capabilities);
		resource.setRequirements(requirements);
		return resource;
	}

}