package org.eclipse.webdav.internal.kernel;
import org.eclipse.webdav.dom.QualifiedName;
import org.eclipse.webdav.internal.kernel.utils.Assert;
/**
* Qualified names are two-part names: qualifier and local name.
* The qualifier must be in URI form (see RFC2396).
* Note however that the qualifier may be <code>null</code> if
* the default name space is being used. The empty space is
* not a valid qualifier.
*/
public class QualifiedNameImpl implements QualifiedName {
/** Qualifier part (potentially <code>null</code>). */
protected String qualifier = null;
/** Local name part. */
protected String localName = null;
/**
* Creates and returns a new qualified name with the given qualifier
* and local name. The local name must not be the empty string.
* The qualifier may be <code>null</code>.
*/
public QualifiedNameImpl(String qualifier, String localName) {
Assert.isLegal(localName != null && localName.length() != 0);
this.qualifier = qualifier;
this.localName = localName;
}
/**
* Returns <code>true</code> if this qualified name is equivalent to the given object.
* <p>
* Qualified names are equal if and only if they have the same
* qualified parts and local parts.
* Qualified names are not equal to objects other than qualified names.
*/
public boolean equals(Object obj) {
if (obj == this)
return true;
if (!(obj instanceof QualifiedName))
return false;
// There may or may not be a qualifier.
QualifiedName qName = (QualifiedName) obj;
if (qualifier == null && qName.getQualifier() != null)
return false;
if (qualifier != null && !qualifier.equals(qName.getQualifier()))
return false;
return localName.equals(qName.getLocalName());
}
/**
* Returns the local part of this name.
*/
public String getLocalName() {
return localName;
}
/**
* Returns the qualifier part for this qualifed name, or <code>null</code>
* if none.
*/
public String getQualifier() {
return qualifier;
}
/**
* Returns the hash code for this qualified name.
*/
public int hashCode() {
return (qualifier == null ? 0 : qualifier.hashCode()) + localName.hashCode();
}
/**
* Converts this qualified name into a string, suitable for
* display (unsuitable for parsing back to a qualified name!).
*/
public String toString() {
return "Namespace: \"" + //$NON-NLS-1$
(getQualifier() == null ? "null" : getQualifier()) + //$NON-NLS-1$
"\", Local part: \"" + //$NON-NLS-1$ //$NON-NLS-2$
getLocalName() + "\""; //$NON-NLS-1$
}
}