Hi Robert,
Please apologize that Olingo is currently weak on documentation. The
project is currently working on its first release and as soon as this is
available we will publish more documentation onto the web site.
For now I can share some client sample code.
Don't hesitate to ask if this code is not sufficient enough.
Regards,
Stephan
========== Client Class ===========================
package org.apache.odata2.olingo.sample.client;
import java.io.IOException;
import java.io.InputStream;
import java.net.HttpURLConnection;
import java.net.InetSocketAddress;
import java.net.Proxy;
import java.net.URL;
import java.util.List;
import org.apache.commons.codec.binary.Base64;
import org.apache.olingo.odata2.api.commons.HttpStatusCodes;
import org.apache.olingo.odata2.api.edm.Edm;
import org.apache.olingo.odata2.api.edm.EdmEntityContainer;
import org.apache.olingo.odata2.api.edm.EdmEntitySetInfo;
import org.apache.olingo.odata2.api.ep.EntityProvider;
import org.apache.olingo.odata2.api.ep.EntityProviderReadProperties;
import org.apache.olingo.odata2.api.ep.feed.ODataFeed;
import org.apache.olingo.odata2.api.exception.ODataException;
public class Client {
public static final String APPLICATION_JSON = "application/json";
public static final String APPLICATION_XML = "application/xml";
public static final String APPLICATION_ATOM_XML = "application/atom+xml";
public static final String METADATA = "$metadata";
private String serviceUrl;
private Proxy.Type protocol;
private String proxy;
private int port;
private boolean useProxy;
private String username;
private String password;
private boolean useAuthentication;
private Edm edm;
public Client(String serviceUrl, Proxy.Type protocol, String proxy, int
port) throws IOException, ODataException, HttpException {
this.serviceUrl = serviceUrl;
this.protocol = protocol;
this.proxy = proxy;
this.port = port;
this.useProxy = true;
this.useAuthentication = false;
edm = getEdmInternal();
}
public Client(String serviceUrl) throws IOException, ODataException,
HttpException {
this.serviceUrl = serviceUrl;
this.useProxy = false;
this.useAuthentication = false;
edm = getEdmInternal();
}
public Client(String serviceUrl, Proxy.Type protocol, String proxy, int
port, String username, String password) throws IOException,
ODataException, HttpException {
this.serviceUrl = serviceUrl;
this.protocol = protocol;
this.proxy = proxy;
this.port = port;
this.useProxy = true;
this.username = username;
this.password = password;
this.useAuthentication = true;
edm = getEdmInternal();
}
public Client(String serviceUrl, String username, String password)
throws IOException, ODataException, HttpException {
this.serviceUrl = serviceUrl;
this.useProxy = false;
this.username = username;
this.password = password;
this.useAuthentication = true;
edm = getEdmInternal();
}
private Edm getEdmInternal() throws IOException, ODataException,
HttpException {
HttpURLConnection connection = connect("$metadata", "application/xml",
"GET");
edm = EntityProvider.readMetadata((InputStream)
connection.getContent(), false);
return edm;
}
private void checkStatus(HttpURLConnection connection) throws
IOException, HttpException {
if (400 <= connection.getResponseCode() &&
connection.getResponseCode() <= 599) {
HttpStatusCodes httpStatusCode =
HttpStatusCodes.fromStatusCode(connection.getResponseCode());
throw new HttpException(httpStatusCode,
httpStatusCode.getStatusCode() + " " + httpStatusCode.toString());
}
}
public Edm getEdm() {
return edm;
}
public List<EdmEntitySetInfo> getEntitySets() throws ODataException {
return edm.getServiceMetadata().getEntitySetInfos();
}
public ODataFeed readFeed(String entityContainerName, String
entitySetName, String contentType) throws IOException, ODataException,
HttpException {
EdmEntityContainer entityContainer =
edm.getEntityContainer(entityContainerName);
String relativeUri;
if (entityContainer.isDefaultEntityContainer()) {
relativeUri = entitySetName;
} else {
relativeUri = entityContainerName + "." + entitySetName;
}
InputStream content = (InputStream) connect(relativeUri, contentType,
"GET").getContent();
return EntityProvider.readFeed(contentType,
entityContainer.getEntitySet(entitySetName), content,
EntityProviderReadProperties.init().build());
}
private HttpURLConnection connect(String relativeUri, String
contentType, String httpMethod) throws IOException, HttpException {
URL url = new URL(serviceUrl + relativeUri);
HttpURLConnection connection;
if (useProxy) {
Proxy proxy = new Proxy(protocol, new InetSocketAddress(this.proxy,
port));
connection = (HttpURLConnection) url.openConnection(proxy);
} else {
connection = (HttpURLConnection) url.openConnection();
}
connection.setRequestMethod(httpMethod);
connection.setRequestProperty("Accept", contentType);
if (useAuthentication) {
String authorization = "Basic ";
authorization += new String(Base64.encodeBase64((this.username + ":"
+ this.password).getBytes()));
connection.setRequestProperty("Authorization", authorization);
}
connection.connect();
checkStatus(connection);
return connection;
}
}
========== Client Exception Class ===========================
package org.apache.odata2.olingo.sample.client;
import org.apache.olingo.odata2.api.commons.HttpStatusCodes;
public class HttpException extends Exception {
private static final long serialVersionUID = 1L;
private HttpStatusCodes httpStatusCode;
public HttpException(HttpStatusCodes httpStatusCode, String message) {
super(message);
this.httpStatusCode = httpStatusCode;
}
public HttpStatusCodes getHttpStatusCode() {
return httpStatusCode;
}
}
On 01.10.13 09:48, "[email protected]"
<[email protected]> wrote:
>Hello,
>
>Would you happen to have any sample OData client code for Olingo? Any
>help would be appreciated.
>
>Thanks.
>
>Roberto B. Trinidad
>Accenture Philippines
>Java Platform Services / Accenture Software for Human Capital Management
>21.56B Robinsons Cybergate Tower 2
>EDSA cor. Pioneeer Street,
>Mandaluyong City, Philippines 1554
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>Cellphone: +63 928 5065100 loc 32704
>E-mail:
>[email protected]<mailto:[email protected]>;
>
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