/* Glazed Lists (c) 2003-2006 */
/* http://publicobject.com/glazedlists/ publicobject.com,*/
/* O'Dell Engineering Ltd.*/
package ca.odell.glazedlists.impl.rbp;
// NIO is used for BRP
import ca.odell.glazedlists.impl.io.Bufferlo;
import java.text.ParseException;
/**
* The address of a resource. This will be either local ("/hello") or remote
* ("glazedlists://host:port/hello").
*
* @author <a href="mailto:jesse@swank.ca">Jesse Wilson</a>
*/
class ResourceUri implements Comparable {
/** the resource host */
private String host;
private int port;
/** the resource path */
private String path;
/** true if this resource is sourced locally */
private boolean local;
/**
* Creates a new {@link ResourceUri}.
*/
private ResourceUri(String host, int port, String path, boolean local) {
this.host = host;
this.port = port;
this.path = path;
this.local = local;
}
/**
* Creates a new returns a {@link ResourceUri} for the specified local path.
*/
public static ResourceUri local(String path) {
return new ResourceUri(null, -1, path, true);
}
/**
* Creates and returns a {@link ResourceUri} for the specified uri. This resource
* will be considered local if the host specified matches the host in the uri.
* Otherwise the uri will be considered remote.
*/
public static ResourceUri localOrRemote(String uri, String localHost, int localPort) {
try {
Bufferlo parser = new Bufferlo();
parser.write(uri);
parser.consume("glazedlists\\:\\/\\/");
String host = parser.readUntil("\\:");
String portString = parser.readUntil("\\/");
int port = Integer.parseInt(portString);
String path = "/" + parser.toString();
boolean local = (localHost.equals(host)) && (localPort == port);
return new ResourceUri(host, port, path, local);
} catch(ParseException e) {
throw new IllegalStateException(e.getMessage());
} catch(NumberFormatException e) {
throw new IllegalStateException(e.getMessage());
}
}
/**
* Creates a new remote {@link ResourceUri}.
*/
public static ResourceUri remote(String host, int port, String path) {
return new ResourceUri(host, port, path, false);
}
/**
* Test if this URI is local.
*/
public boolean isLocal() {
return local;
}
/**
* Test if this URI is remote.
*/
public boolean isRemote() {
return !local;
}
/**
* Get the URI host.
*/
public String getHost() {
return host;
}
/**
* Get the URI port.
*/
public int getPort() {
return port;
}
/**
* Gets this resource as a String, substituting the specified local host and
* local port as necessary.
*/
public String toString(String localHost, int localPort) {
if(local) {
return "glazedlists://" + localHost + ":" + localPort + path;
} else {
return "glazedlists://" + host + ":" + port + path;
}
}
public String toString() {
return "Resource URI [local=" + local + ", host=" + host + ", port=" + port + ", path=" + path + "]";
}
/**
* Computes a hash of this resource uri.
*/
public int hashCode() {
int result = path.hashCode();
if(!local) {
result = 37 * result + host.hashCode();
result = 37 * result + port;
}
return result;
}
/**
* Compares two resources.
*/
public int compareTo(Object other) {
if(other == null) throw new NullPointerException();
ResourceUri otherUri = (ResourceUri)other;
if(otherUri.local != this.local) throw new IllegalStateException("Cannot compare local URI with remote URI: " + other + " vs. " + this);
int result = path.compareTo(otherUri.path);
if(result != 0) return result;
if(!local) {
result = host.compareTo(otherUri.host);
if(result != 0) return result;
result = port - otherUri.port;
if(result != 0) return result;
}
return 0;
}
/**
* Tests if this ResourceUri equals that ResourceUri.
*/
public boolean equals(Object other) {
return (compareTo(other) == 0);
}
}