/**
* Initialisation routine called after handler creation with the element name and attributes.
* The attributes which this handler can deal with are: <code>"name"</code>, <code>"depends"
* </code>, <code>"if"</code>, <code>"unless"</code>, <code>"id"</code> and <code>"description"
* </code>.
*
* @param uri The namespace URI for this element.
* @param tag Name of the element which caused this handler to be created. Should not be <code>
* null</code>. Ignored in this implementation.
* @param qname The qualified name for this element.
* @param attrs Attributes of the element which caused this handler to be created. Must not be
* <code>null</code>.
* @param context The current context.
* @exception SAXParseException if an unexpected attribute is encountered or if the <code>"name"
* </code> attribute is missing.
*/
public void onStartElement(
String uri, String tag, String qname, Attributes attrs, AntXMLContext context)
throws SAXParseException {
String name = null;
String depends = "";
String extensionPoint = null;
OnMissingExtensionPoint extensionPointMissing = null;
Project project = context.getProject();
Target target = "target".equals(tag) ? new Target() : new ExtensionPoint();
target.setProject(project);
target.setLocation(new Location(context.getLocator()));
context.addTarget(target);
for (int i = 0; i < attrs.getLength(); i++) {
String attrUri = attrs.getURI(i);
if (attrUri != null && !attrUri.equals("") && !attrUri.equals(uri)) {
continue; // Ignore attributes from unknown uris
}
String key = attrs.getLocalName(i);
String value = attrs.getValue(i);
if (key.equals("name")) {
name = value;
if ("".equals(name)) {
throw new BuildException("name attribute must " + "not be empty");
}
} else if (key.equals("depends")) {
depends = value;
} else if (key.equals("if")) {
target.setIf(value);
} else if (key.equals("unless")) {
target.setUnless(value);
} else if (key.equals("id")) {
if (value != null && !value.equals("")) {
context.getProject().addReference(value, target);
}
} else if (key.equals("description")) {
target.setDescription(value);
} else if (key.equals("extensionOf")) {
extensionPoint = value;
} else if (key.equals("onMissingExtensionPoint")) {
try {
extensionPointMissing = OnMissingExtensionPoint.valueOf(value);
} catch (IllegalArgumentException e) {
throw new BuildException("Invalid onMissingExtensionPoint " + value);
}
} else {
throw new SAXParseException("Unexpected attribute \"" + key + "\"", context.getLocator());
}
}
if (name == null) {
throw new SAXParseException(
"target element appears without a name attribute", context.getLocator());
}
String prefix = null;
boolean isInIncludeMode = context.isIgnoringProjectTag() && isInIncludeMode();
String sep = getCurrentPrefixSeparator();
if (isInIncludeMode) {
prefix = getTargetPrefix(context);
if (prefix == null) {
throw new BuildException(
"can't include build file "
+ context.getBuildFileURL()
+ ", no as attribute has been given"
+ " and the project tag doesn't"
+ " specify a name attribute");
}
name = prefix + sep + name;
}
// Check if this target is in the current build file
if (context.getCurrentTargets().get(name) != null) {
throw new BuildException("Duplicate target '" + name + "'", target.getLocation());
}
Hashtable projectTargets = project.getTargets();
boolean usedTarget = false;
// If the name has not already been defined define it
if (projectTargets.containsKey(name)) {
project.log(
"Already defined in main or a previous import, ignore " + name, Project.MSG_VERBOSE);
} else {
target.setName(name);
context.getCurrentTargets().put(name, target);
project.addOrReplaceTarget(name, target);
usedTarget = true;
}
if (depends.length() > 0) {
if (!isInIncludeMode) {
target.setDepends(depends);
} else {
for (Iterator iter = Target.parseDepends(depends, name, "depends").iterator();
iter.hasNext(); ) {
target.addDependency(prefix + sep + iter.next());
}
}
}
if (!isInIncludeMode
&& context.isIgnoringProjectTag()
&& (prefix = getTargetPrefix(context)) != null) {
// In an imported file (and not completely
// ignoring the project tag or having a preconfigured prefix)
String newName = prefix + sep + name;
Target newTarget = usedTarget ? new Target(target) : target;
newTarget.setName(newName);
context.getCurrentTargets().put(newName, newTarget);
project.addOrReplaceTarget(newName, newTarget);
}
if (extensionPointMissing != null && extensionPoint == null) {
throw new BuildException(
"onMissingExtensionPoint attribute cannot "
+ "be specified unless extensionOf is specified",
target.getLocation());
}
if (extensionPoint != null) {
ProjectHelper helper =
(ProjectHelper)
context.getProject().getReference(ProjectHelper.PROJECTHELPER_REFERENCE);
for (Iterator iter = Target.parseDepends(extensionPoint, name, "extensionOf").iterator();
iter.hasNext(); ) {
String tgName = (String) iter.next();
if (isInIncludeMode()) {
tgName = prefix + sep + tgName;
}
if (extensionPointMissing == null) {
extensionPointMissing = OnMissingExtensionPoint.FAIL;
}
// defer extensionpoint resolution until the full
// import stack has been processed
helper.getExtensionStack().add(new String[] {tgName, name, extensionPointMissing.name()});
}
}
}
private List generateSequence(List projects) {
DefaultModelFactory factory = new DefaultModelFactory();
Repository repository = (Repository) getProject().getReference("q.project.repository");
factory.setRepository(repository);
// 1st pass: map artifacts generated from each project to a target representing their project
// files
Project tempProject = new Project();
Map targetsByArtifact = new HashMap();
Map targetsByProject = new HashMap();
List models = new ArrayList();
for (Iterator i = projects.iterator(); i.hasNext(); ) {
File projectFile = (File) i.next();
// For now, we assume the default profile will contain all dependencies
ProjectModel model =
factory.getProjectModel(
projectFile, Collections.EMPTY_LIST, true, null, new TaskLogger(this), getProject());
models.add(model);
// Create a target for each project file
Target target = new Target();
target.setName(projectFile.getAbsolutePath());
tempProject.addTarget(target);
targetsByProject.put(model.getProject().getProjectFile(), target);
// Map the artifacts to the target
for (Iterator j = model.getProject().getArtifacts().iterator(); j.hasNext(); ) {
Artifact artifact = (Artifact) j.next();
targetsByArtifact.put(artifact.getId(), target);
}
}
// 2nd pass: Process project dependencies. Where a dependency uses an artifactId found in the
// 1st pass,
// set up a dependency between the projects.
for (Iterator i = models.iterator(); i.hasNext(); ) {
ProjectModel model = (ProjectModel) i.next();
Target projectTarget = (Target) targetsByProject.get(model.getProject().getProjectFile());
Set dependencies = getDependencies(model);
// Where there is a dependency between projects, mirror it in the targets
for (Iterator j = dependencies.iterator(); j.hasNext(); ) {
RepoArtifactId id = (RepoArtifactId) j.next();
Target dependencyTarget = (Target) targetsByArtifact.get(id);
if (dependencyTarget != null) {
projectTarget.addDependency(dependencyTarget.getName());
}
}
}
// Use ANT's target dependency mechanism to produce a build sequence
String anyTarget = ((Target) targetsByArtifact.values().iterator().next()).getName();
Collection sequencedTargets = tempProject.topoSort(anyTarget, tempProject.getTargets());
// Transform targets into a list of files
List sequence = new ArrayList();
for (Iterator i = sequencedTargets.iterator(); i.hasNext(); ) {
Target seqTarget = (Target) i.next();
sequence.add(new File(seqTarget.getName()));
}
return sequence;
}
/**
* Parse a source xml input.
*
* @param project the current project
* @param source the xml source
* @exception BuildException if an error occurs
*/
public void parse(Project project, Object source) throws BuildException {
getImportStack().addElement(source);
AntXMLContext context = null;
context = (AntXMLContext) project.getReference(REFID_CONTEXT);
if (context == null) {
context = new AntXMLContext(project);
project.addReference(REFID_CONTEXT, context);
project.addReference(REFID_TARGETS, context.getTargets());
}
if (getImportStack().size() > 1) {
// we are in an imported file.
context.setIgnoreProjectTag(true);
Target currentTarget = context.getCurrentTarget();
Target currentImplicit = context.getImplicitTarget();
Map currentTargets = context.getCurrentTargets();
try {
Target newCurrent = new Target();
newCurrent.setProject(project);
newCurrent.setName("");
context.setCurrentTarget(newCurrent);
context.setCurrentTargets(new HashMap());
context.setImplicitTarget(newCurrent);
parse(project, source, new RootHandler(context, mainHandler));
newCurrent.execute();
} finally {
context.setCurrentTarget(currentTarget);
context.setImplicitTarget(currentImplicit);
context.setCurrentTargets(currentTargets);
}
} else {
// top level file
context.setCurrentTargets(new HashMap());
parse(project, source, new RootHandler(context, mainHandler));
// Execute the top-level target
context.getImplicitTarget().execute();
// resolve extensionOf attributes
for (Iterator i = getExtensionStack().iterator(); i.hasNext(); ) {
String[] extensionInfo = (String[]) i.next();
String tgName = extensionInfo[0];
String name = extensionInfo[1];
OnMissingExtensionPoint missingBehaviour =
OnMissingExtensionPoint.valueOf(extensionInfo[2]);
Hashtable projectTargets = project.getTargets();
if (!projectTargets.containsKey(tgName)) {
String message =
"can't add target "
+ name
+ " to extension-point "
+ tgName
+ " because the extension-point is unknown.";
if (missingBehaviour == OnMissingExtensionPoint.FAIL) {
throw new BuildException(message);
} else if (missingBehaviour == OnMissingExtensionPoint.WARN) {
Target target = (Target) projectTargets.get(name);
context.getProject().log(target, "Warning: " + message, Project.MSG_WARN);
}
} else {
Target t = (Target) projectTargets.get(tgName);
if (!(t instanceof ExtensionPoint)) {
throw new BuildException("referenced target " + tgName + " is not an extension-point");
}
t.addDependency(name);
}
}
}
}