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package org.glassfish.deployment.versioning;
import com.sun.enterprise.config.serverbeans.Application;
import com.sun.enterprise.util.LocalStringManagerImpl;
import java.util.ArrayList;
import java.util.Collections;
import java.util.Iterator;
import java.util.List;
import java.util.StringTokenizer;
/**
* This class provides utility methods to handle application names
* in the versioning context
*
* @author Romain GRECOURT - SERLI (romain.grecourt@serli.com)
*/
public class VersioningUtils {
public static final LocalStringManagerImpl LOCALSTRINGS =
new LocalStringManagerImpl(VersioningUtils.class);
public static final String EXPRESSION_SEPARATOR = ":";
public static final String EXPRESSION_WILDCARD = "*";
public static final String REPOSITORY_DASH = "~";
/**
* Extract the untagged name for a given application name that complies
* with versioning rules (version identifier / expression) or not.
*
* If the application name is using versioning rules, the method will split
* the application names with the colon character and retrieve the
* untagged name from the first token.
*
* Else the given application name is an untagged name.
*
* @param appName the application name
* @return the untagged version name
* @throws VersioningSyntaxException if the given application name had some
* critical patterns.
*/
public static final String getUntaggedName(String appName)
throws VersioningSyntaxException {
if(appName != null && !appName.isEmpty()){
int colonIndex = appName.indexOf(EXPRESSION_SEPARATOR);
// if the appname contains a EXPRESSION_SEPARATOR
if (colonIndex >= 0){
if (colonIndex == 0) {
// if appName is starting with a colon
throw new VersioningSyntaxException(
LOCALSTRINGS.getLocalString("versioning.deployment.invalid.appname1",
"excepted application name before colon: {0}",
appName));
} else if (colonIndex == (appName.length() - 1)) {
// if appName is ending with a colon
throw new VersioningSyntaxException(
LOCALSTRINGS.getLocalString("versioning.deployment.invalid.appname2",
"excepted version identifier after colon: {0}",
appName));
}
// versioned
return appName.substring(0, colonIndex);
}
}
// not versioned
return appName;
}
/**
* Extract the version identifier / expression for a given application name
* that complies with versioning rules.
*
* The method splits the application name with the colon character
* and retrieve the 2nd token.
*
* @param appName the application name
* @return the version identifier / expression extracted from application name
* @throws VersioningSyntaxException if the given application name had some
* critical patterns.
*/
public static final String getExpression(String appName)
throws VersioningSyntaxException {
if(appName != null && !appName.isEmpty()) {
int colonIndex = appName.indexOf(EXPRESSION_SEPARATOR);
// if the appname contains a EXPRESSION_SEPARATOR
if (colonIndex >= 0){
if (colonIndex == 0) {
// if appName is starting with a colon
throw new VersioningSyntaxException(
LOCALSTRINGS.getLocalString("versioning.deployment.invalid.appname1",
"excepted application name before colon: {0}",
appName));
} else if (colonIndex == (appName.length() - 1)) {
// if appName is ending with a colon
throw new VersioningSyntaxException(
LOCALSTRINGS.getLocalString("versioning.deployment.invalid.appname2",
"excepted version identifier after colon: {0}",
appName));
}
// versioned
return appName.substring(colonIndex + 1, appName.length());
}
}
// not versioned
return null;
}
/**
* Check a versionned application name.
*
* This method is used to provide consistant error messages for identifier
* aware operations.
*
* @param appName the application name
* @throws VersioningSyntaxException if the given application name had some
* critical patterns.
* @throws VersioningException if the given application name had some
* wildcard character(s) in its identifier part.
*/
public static final void checkIdentifier(String appName)
throws VersioningException {
String identifier = getExpression(appName);
if (identifier != null && identifier.contains(EXPRESSION_WILDCARD)) {
throw new VersioningWildcardException(
LOCALSTRINGS.getLocalString("versioning.deployment.wildcard.not.allowed",
"Wildcard character(s) are not allowed in a version identifier."));
}
}
/**
* Extract the set of version(s) of the given application from a set of
* applications. This method is used by unit tests.
*
* @param untaggedName the application name as an untagged version : an
* application name without version identifier
* @param allApplications the set of applications
* @return all the version(s) of the given application in the given set of
* applications
*/
public static final List<String> getVersions(String untaggedName,
List<Application> allApplications) {
List<String> allVersions = new ArrayList<String>();
Iterator<Application> it = allApplications.iterator();
while (it.hasNext()) {
Application app = it.next();
// if a tagged version or untagged version of the app
if (app.getName().startsWith(untaggedName + EXPRESSION_SEPARATOR)
|| app.getName().equals(untaggedName)) {
allVersions.add(app.getName());
}
}
return allVersions;
}
/**
* Search for the version(s) matched by the expression contained in the given
* application name. This method is used by unit tests.
*
* @param listVersion the set of all versions of the application
* @param appName the application name containing the expression
* @return the expression matched list
* @throws VersioningException if the expression is an identifier matching
* a version not registered, or if getExpression throws an exception
*/
public static final List<String> matchExpression(List<String> listVersion, String appName)
throws VersioningException {
if (listVersion.size() == 0) {
return Collections.EMPTY_LIST;
}
String expressionVersion = getExpression(appName);
// if using an untagged version
if (expressionVersion == null) {
// return the matched version if exist
if (listVersion.contains(appName)) {
return listVersion.subList(listVersion.indexOf(appName),
listVersion.indexOf(appName) + 1);
} else {
throw new VersioningException(
LOCALSTRINGS.getLocalString("versioning.deployment.version.notreg",
"version {0} not registered",
appName));
}
}
// if using an identifier
if (expressionVersion.indexOf(EXPRESSION_WILDCARD) == -1) {
// return the matched version if exist
if (listVersion.contains(appName)) {
return listVersion.subList(listVersion.indexOf(appName),
listVersion.indexOf(appName) + 1);
} else {
throw new VersioningException(
LOCALSTRINGS.getLocalString("versioning.deployment.version.notreg",
"Version {0} not registered",
appName));
}
}
StringTokenizer st = new StringTokenizer(expressionVersion,
EXPRESSION_WILDCARD);
String lastToken = null;
List<String> matchedVersions = new ArrayList<String>(listVersion);
while (st.hasMoreTokens()) {
String token = st.nextToken();
Iterator it = listVersion.iterator();
while (it.hasNext()) {
String app = (String) it.next();
String identifier = getExpression(app);
// get the position of the last token in the current identifier
int lastTokenIndex = -1;
if (lastToken != null) {
lastTokenIndex = identifier.indexOf(lastToken);
}
// matching expression on the current identifier
if (identifier != null) {
if ( expressionVersion.startsWith(token)
&& ! identifier.startsWith(token) ) {
matchedVersions.remove(app);
} else if ( expressionVersion.endsWith(token)
&& !identifier.endsWith(token) ) {
matchedVersions.remove(app);
} else if ( !identifier.contains(token.subSequence(0, token.length() - 1))
|| identifier.indexOf(token) <= lastTokenIndex ) {
matchedVersions.remove(app);
}
} else {
matchedVersions.remove(app);
}
}
lastToken = token;
}
// returns matched version(s)
return matchedVersions;
}
/**
* Replaces colons with dashs in the given application name.
*
* @param appName the application name
* @return a valid repository name
*/
public static final String getRepositoryName(String appName) {
return appName.replace(EXPRESSION_SEPARATOR, REPOSITORY_DASH);
}
/**
* Test if the given application name is an untagged name
*
* @param appName the application name
* @return <code>true</code> is the given application name is not versioned
* @throws VersioningSyntaxException if getUntaggedName
* throws exception
*/
public static final Boolean isUntagged(String appName)
throws VersioningSyntaxException {
Boolean isUntagged = false;
String untaggedName = VersioningUtils.getUntaggedName(appName);
if (untaggedName != null && untaggedName.equals(appName)) {
isUntagged = true;
}
return isUntagged;
}
/**
* Test if the given application name is a version expression
*
* @param appName the application name
* @return <code>true</code> if the appName is a version expression
* @throws VersioningSyntaxException if isUntaggedName
* throws exception
*/
public static final Boolean isVersionExpression(String appName)
throws VersioningSyntaxException {
Boolean isVersionExpression = false;
if(appName != null){
isVersionExpression = !isUntagged(appName);
}
return isVersionExpression;
}
/**
* Test if the given application name is a version expression containing
* any wildcard character. That is to say the version expression is matching
* more than one version.
*
* @param appName the application name
* @return <code>true</code> if the appName is a version expression matching
* more than one version.
* @throws VersioningSyntaxException if isVersionExpression
* throws exception
*/
public static final Boolean isVersionExpressionWithWildCard(String appName)
throws VersioningSyntaxException {
return isVersionExpression(appName)
&& appName.contains(EXPRESSION_WILDCARD);
}
/**
* Test if the given application name is a version identifier.
*
* @param appName the application name
* @return <code>true</code> if the appName is a version identifier
* @throws VersioningSyntaxException if isVersionExpression
* throws exception
*/
public static final Boolean isVersionIdentifier(String appName)
throws VersioningSyntaxException{
return isVersionExpression(appName) &&
!appName.contains(EXPRESSION_WILDCARD);
}
}