package org.eclipse.webdav.internal.kernel;
import org.eclipse.webdav.ILocator;
import org.eclipse.webdav.internal.kernel.utils.Assert;
/**
* A <code>LocatorImpl</code> uniquely identifies a DAV
* a resource.
* <p>
* This class implements the <code>Locator</code>
* interface.</p>
*
* @see Locator
*/
public class Locator implements ILocator {
protected String resourceURL;
protected String label;
protected boolean isStable;
public Locator(String resourceURL, String label) {
super();
Assert.isLegal(resourceURL != null);
this.resourceURL = resourceURL;
this.label = label;
this.isStable = false;
}
/**
* Return a boolean value indicating whether or not this locator
* and the given object are equal.
*
* @param obj the object to compare against
* @return equality indicator
*/
public boolean equals(Object obj) {
if (this == obj)
return true;
if (!(obj instanceof ILocator))
return false;
ILocator locator = (ILocator) obj;
if (!resourceURL.equals(locator.getResourceURL()))
return false;
if (label == null)
return locator.getLabel() == null;
return label.equals(locator.getLabel());
}
public int hashCode() {
return resourceURL.hashCode();
}
public String getLabel() {
return label;
}
public String getResourceURL() {
return resourceURL;
}
public boolean isStable() {
return isStable;
}
public void markStable() {
// Stable URLs cannot not have a label.
Assert.isTrue(label == null);
isStable = true;
}
public String toString() {
StringBuffer buffer = new StringBuffer();
buffer.append("[Locator "); //$NON-NLS-1$
buffer.append(resourceURL);
if (label != null) {
buffer.append("\n label: "); //$NON-NLS-1$
buffer.append(label);
}
if (isStable)
buffer.append("\n stable"); //$NON-NLS-1$
buffer.append("]"); //$NON-NLS-1$
return buffer.toString();
}
}