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/*******************************************************************************
* Copyright (c) 2010, 2012 Oracle.
* All rights reserved. This program and the accompanying materials
* are made available under the terms of the Eclipse Public License v1.0
* and Apache License v2.0 which accompanies this distribution.
* The Eclipse Public License is available at
* http://www.eclipse.org/legal/epl-v10.html
* and the Apache License v2.0 is available at
* http://www.opensource.org/licenses/apache2.0.php.
* You may elect to redistribute this code under either of these licenses.
*
* Contributors:
* Bob Nettleton (Oracle) - Initial Reference Implementation
******************************************************************************/
package org.eclipse.gemini.naming;
/**
* Utility Class to parse the "osgi:services" URL syntax
*
*/
class OSGiURLParser {
private static final String OSGI_SERVICE_PREFIX = "osgi:service/";
private static final String OSGI_SERVICE_LIST_PREFIX = "osgi:servicelist/";
private final String m_osgiURL;
private String m_serviceInterface = null;
private String m_filter = null;
private boolean m_parsingCompleted = false;
private boolean m_isServiceList = false;
public OSGiURLParser(String osgiURL) {
m_osgiURL = osgiURL;
}
public void parse() {
if (m_osgiURL.startsWith(OSGI_SERVICE_PREFIX)) {
parseURLData(OSGI_SERVICE_PREFIX);
}
else {
if (m_osgiURL.startsWith(OSGI_SERVICE_LIST_PREFIX)) {
parseURLData(OSGI_SERVICE_LIST_PREFIX);
m_isServiceList = true;
}
else {
throw new IllegalStateException(
"URL '" + m_osgiURL + "'" + "did not conform to the OSGi URL Syntax");
}
}
}
public String getServiceInterface() {
checkParserState();
return m_serviceInterface;
}
public String getFilter() {
checkParserState();
return m_filter;
}
public boolean hasFilter() {
checkParserState();
return getFilter() != null;
}
public boolean isServiceListURL() {
checkParserState();
return m_isServiceList;
}
private void checkParserState() {
if (!m_parsingCompleted)
throw new IllegalStateException("OSGi URL has not been parsed");
}
private void parseURLData(final String prefix) {
String urlData = m_osgiURL.substring(prefix.length());
if ('/' == urlData.charAt(0)) {
throw new IllegalStateException(
"URL did not conform to the OSGi URL Syntax - No Service Interface specified");
}
int indexOfSlash = urlData.indexOf("/(");
if (indexOfSlash != -1) {
// interpret everything after the slash to be an OSGi filter
// string
m_serviceInterface = urlData.substring(0, indexOfSlash);
m_filter = urlData.substring(indexOfSlash + 1);
}
else {
m_serviceInterface = urlData;
}
if (m_serviceInterface.length() == 0) {
throw new IllegalStateException(
"URL did not conform to the OSGi URL Syntax - No Service Interface specified");
}
m_parsingCompleted = true;
}
}
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