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This library is used to make integration with Certillion server, so our Clients can easily ask for signatures or generate certificates.

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package br.com.esec.icpm.libs.signature;

import java.io.InputStream;

import javax.ws.rs.Path;
import javax.ws.rs.client.Entity;
import javax.ws.rs.client.WebTarget;
import javax.ws.rs.core.MediaType;
import javax.ws.rs.core.Response;
import javax.ws.rs.core.Response.Status.Family;

import br.com.esec.icpm.mss.rest.ApplicationProviderResource;

public class ApplicationProviderClient implements ApplicationProviderResource {

	private WebTarget target;

	public ApplicationProviderClient(WebTarget target) {
		this.target = target;
	}

	@Override
	public void downloadSignedDocument(long transactionId) {
		throw new UnsupportedOperationException("Nao implementado nesse proxy client.");
	}

	public InputStream downloadSignedDocumentCustomized(long transactionId) {
		try {
			String basePath = ApplicationProviderResource.class.getAnnotation(Path.class).value();
			String extraPath = ApplicationProviderResource.class.getDeclaredMethod("downloadSignedDocument", Long.TYPE).getAnnotation(Path.class).value();
			String uri = basePath + extraPath;

			Response response = target.path(uri).resolveTemplate("transactionId", transactionId).request().get();

			if (response.getStatusInfo().getFamily() == Family.SUCCESSFUL) {
				return response.readEntity(InputStream.class);
			} else {
				throw new IllegalStateException("Cannot upload document. Certillion server anwser with status '" + response.getStatusInfo().getReasonPhrase() + " (" + response.getStatusInfo().getStatusCode() + ")'");
			}
		} catch (NoSuchMethodException e) {
			throw new IllegalStateException("Method downloadSignedDocument cannot be found.", e);
		} catch (SecurityException e) {
			throw new IllegalStateException("Method downloadSignedDocument cannot be access.", e);
		}
	}

	@Override
	public String oldUpload(InputStream document) {
		throw new UnsupportedOperationException("Nao implementado nesse proxy client.");
	}

	@Override
	public String uploadDocument(InputStream document) {
		try {
			String basePath = ApplicationProviderResource.class.getAnnotation(Path.class).value();
			String extraPath = ApplicationProviderResource.class.getDeclaredMethod("uploadDocument", InputStream.class).getAnnotation(Path.class).value();
			String uri = basePath + extraPath;
			
			Response response = target
					.path(uri)
					.request(MediaType.TEXT_PLAIN)
					.post(Entity.entity(document, MediaType.APPLICATION_OCTET_STREAM));
			
			if (response.getStatusInfo().getFamily() == Family.SUCCESSFUL) {
				return response.readEntity(String.class);
			} else {
				throw new IllegalStateException("Cannot upload document. Certillion server anwser with status '" + response.getStatusInfo().getReasonPhrase() + " (" + response.getStatusInfo().getStatusCode() + ")'");
			}
		} catch (NoSuchMethodException e) {
			throw new IllegalStateException("Method uploadDocument cannot be found.", e);
		} catch (SecurityException e) {
			throw new IllegalStateException("Method uploadDocument cannot be access.", e);
		}
	}

}