null.
*/
public AbstractHandler(DefaultHandler parentHandler) {
this.parentHandler = parentHandler;
// Start handling SAX events
parser.setContentHandler(this);
}
/**
* Handles the start of an element. This base implementation just
* throws an exception.
*
* @param tag The name of the element being started.
* Will not be null.
* @param attrs Attributes of the element being started.
* Will not be null.
*
* @exception SAXParseException if this method is not overridden, or in
* case of error in an overridden version
*/
public void startElement(String uri, String tag, String qname,
AttributeList attrs)
throws SAXParseException
{
throw new SAXParseException("Unexpected element \"" + tag + "\"", locator);
}
/**
* Handles text within an element. This base implementation just
* throws an exception.
*
* @param buf A character array of the text within the element.
* Will not be null.
* @param start The start element in the array.
* @param count The number of characters to read from the array.
*
* @exception SAXParseException if this method is not overridden, or in
* case of error in an overridden version
*/
public void characters(char[] buf, int start, int count) throws SAXParseException {
String s = new String(buf, start, count).trim();
if (s.length() > 0) {
throw new SAXParseException("Unexpected text \"" + s + "\"", locator);
}
}
/**
* Called when this element and all elements nested into it have been
* handled.
*/
protected void finished() {}
/**
* Handles the end of an element. Any required clean-up is performed
* by the finished() method and then the original handler is restored to
* the parser.
*
* @param name The name of the element which is ending.
* Will not be null.
*
* @exception SAXException in case of error (not thrown in
* this implementation)
*
* @see #finished()
*/
public void endElement(String uri, String name, String qName) throws SAXException {
finished();
// Let parent resume handling SAX events
parser.setContentHandler(parentHandler);
}
}
/**
* Handler for the root element. Its only child must be the "project" element.
*/
private class RootHandler extends DefaultHandler {
/**
* Resolves file: URIs relative to the build file.
*
* @param publicId The public identifer, or null
* if none is available. Ignored in this
* implementation.
* @param systemId The system identifier provided in the XML
* document. Will not be null.
*/
public InputSource resolveEntity(String publicId,
String systemId) {
project.log("resolving systemId: " + systemId, Project.MSG_VERBOSE);
if (systemId.startsWith("file:")) {
String path = systemId.substring(5);
int index = path.indexOf("file:");
// we only have to handle these for backward compatibility
// since they are in the FAQ.
while (index != -1) {
path = path.substring(0, index) + path.substring(index + 5);
index = path.indexOf("file:");
}
String entitySystemId = path;
index = path.indexOf("%23");
// convert these to #
while (index != -1) {
path = path.substring(0, index) + "#" + path.substring(index + 3);
index = path.indexOf("%23");
}
File file = new File(path);
if (!file.isAbsolute()) {
file = new File(buildFileParent, path);
}
try {
InputSource inputSource = new InputSource(new FileInputStream(file));
inputSource.setSystemId("file:" + entitySystemId);
return inputSource;
} catch (FileNotFoundException fne) {
project.log(file.getAbsolutePath()+" could not be found",
Project.MSG_WARN);
}
}
// use default if not file or file not found
return null;
}
/**
* Handles the start of a project element. A project handler is created
* and initialised with the element name and attributes.
*
* @param tag The name of the element being started.
* Will not be null.
* @param attrs Attributes of the element being started.
* Will not be null.
*
* @exception SAXParseException if the tag given is not
* "project"
*/
public void startElement(String uri, String tag, String qname, AttributeList attrs)
throws SAXParseException
{
if (tag.equals("project")) {
new ProjectHandler(this).init(tag, attrs);
} else {
throw new SAXParseException("Config file is not of expected XML type", locator);
}
}
/**
* Sets the locator in the project helper for future reference.
*
* @param locator The locator used by the parser.
* Will not be null.
*/
public void setDocumentLocator(Locator locator) {
ProjectHelperImpl2.this.locator = locator;
}
}
/**
* Handler for the top level "project" element.
*/
private class ProjectHandler extends AbstractHandler {
/**
* Constructor which just delegates to the superconstructor.
*
* @param parentHandler The handler which should be restored to the
* parser at the end of the element.
* Must not be null.
*/
public ProjectHandler(DefaultHandler parentHandler) {
super(parentHandler);
}
/**
* Initialisation routine called after handler creation
* with the element name and attributes. The attributes which
* this handler can deal with are: "default",
* "name", "id" and "basedir".
*
* @param tag Name of the element which caused this handler
* to be created. Should not be null.
* Ignored in this implementation.
* @param attrs Attributes of the element which caused this
* handler to be created. Must not be null.
*
* @exception SAXParseException if an unexpected attribute is
* encountered or if the "default" attribute
* is missing.
*/
public void init(String tag, AttributeList attrs) throws SAXParseException {
String def = null;
String name = null;
String id = null;
String baseDir = null;
for (int i = 0; i < attrs.getLength(); i++) {
String key = attrs.getName(i);
String value = attrs.getValue(i);
if (key.equals("default")) {
def = value;
} else if (key.equals("name")) {
name = value;
} else if (key.equals("id")) {
id = value;
} else if (key.equals("basedir")) {
baseDir = value;
} else {
throw new SAXParseException("Unexpected attribute \"" + attrs.getName(i) + "\"", locator);
}
}
if (def == null) {
throw new SAXParseException("The default attribute of project is required",
locator);
}
project.setDefaultTarget(def);
if (name != null) {
project.setName(name);
project.addReference(name, project);
}
if (id != null) {
project.addReference(id, project);
}
if (project.getProperty("basedir") != null) {
project.setBasedir(project.getProperty("basedir"));
} else {
if (baseDir == null) {
project.setBasedir(buildFileParent.getAbsolutePath());
} else {
// check whether the user has specified an absolute path
if ((new File(baseDir)).isAbsolute()) {
project.setBasedir(baseDir);
} else {
project.setBaseDir(project.resolveFile(baseDir, buildFileParent));
}
}
}
}
/**
* Handles the start of a top-level element within the project. An
* appropriate handler is created and initialised with the details
* of the element.
*
* @param tag The name of the element being started.
* Will not be null.
* @param attrs Attributes of the element being started.
* Will not be null.
*
* @exception SAXParseException if the tag given is not
* "taskdef", "typedef",
* "property", "target"
* or a data type definition
*/
public void startElement(String uri, String name, String qname, AttributeList attrs)
throws SAXParseException
{
if (name.equals("taskdef")) {
handleTaskdef(name, attrs);
} else if (name.equals("typedef")) {
handleTypedef(name, attrs);
} else if (name.equals("property")) {
handleProperty(name, attrs);
} else if (name.equals("target")) {
handleTarget(name, attrs);
} else if (project.getDataTypeDefinitions().get(name) != null) {
handleDataType(name, attrs);
} else {
throw new SAXParseException("Unexpected element \"" + name + "\"", locator);
}
}
/**
* Handles a task defintion element by creating a task handler
* and initialising is with the details of the element.
*
* @param tag The name of the element to be handled.
* Will not be null.
* @param attrs Attributes of the element to be handled.
* Will not be null.
*
* @exception SAXParseException if an error occurs when initialising
* the task handler
*
*/
private void handleTaskdef(String name, AttributeList attrs) throws SAXParseException {
(new TaskHandler(this, null, null, null)).init(name, attrs);
}
/**
* Handles a type defintion element by creating a task handler
* and initialising is with the details of the element.
*
* @param tag The name of the element to be handled.
* Will not be null.
* @param attrs Attributes of the element to be handled.
* Will not be null.
*
* @exception SAXParseException if an error occurs initialising the
* handler
*/
private void handleTypedef(String name, AttributeList attrs) throws SAXParseException {
(new TaskHandler(this, null, null, null)).init(name, attrs);
}
/**
* Handles a property defintion element by creating a task handler
* and initialising is with the details of the element.
*
* @param tag The name of the element to be handled.
* Will not be null.
* @param attrs Attributes of the element to be handled.
* Will not be null.
*
* @exception SAXParseException if an error occurs initialising
* the handler
*/
private void handleProperty(String name, AttributeList attrs) throws SAXParseException {
(new TaskHandler(this, null, null, null)).init(name, attrs);
}
/**
* Handles a target defintion element by creating a target handler
* and initialising is with the details of the element.
*
* @param tag The name of the element to be handled.
* Will not be null.
* @param attrs Attributes of the element to be handled.
* Will not be null.
*
* @exception SAXParseException if an error occurs initialising
* the handler
*/
private void handleTarget(String tag, AttributeList attrs) throws SAXParseException {
new TargetHandler(this).init(tag, attrs);
}
/**
* Handles a data type defintion element by creating a data type
* handler and initialising is with the details of the element.
*
* @param tag The name of the element to be handled.
* Will not be null.
* @param attrs Attributes of the element to be handled.
* Will not be null.
*
* @exception SAXParseException if an error occurs initialising
* the handler
*/
private void handleDataType(String name, AttributeList attrs) throws SAXParseException {
new DataTypeHandler(this).init(name, attrs);
}
}
/**
* Handler for "target" elements.
*/
private class TargetHandler extends AbstractHandler {
private Target target;
/**
* Constructor which just delegates to the superconstructor.
*
* @param parentHandler The handler which should be restored to the
* parser at the end of the element.
* Must not be null.
*/
public TargetHandler(DefaultHandler parentHandler) {
super(parentHandler);
}
/**
* Initialisation routine called after handler creation
* with the element name and attributes. The attributes which
* this handler can deal with are: "name",
* "depends", "if",
* "unless", "id" and
* "description".
*
* @param tag Name of the element which caused this handler
* to be created. Should not be null.
* Ignored in this implementation.
* @param attrs Attributes of the element which caused this
* handler to be created. Must not be null.
*
* @exception SAXParseException if an unexpected attribute is encountered
* or if the "name" attribute is missing.
*/
public void init(String tag, AttributeList attrs) throws SAXParseException {
String name = null;
String depends = "";
String ifCond = null;
String unlessCond = null;
String id = null;
String description = null;
for (int i = 0; i < attrs.getLength(); i++) {
String key = attrs.getName(i);
String value = attrs.getValue(i);
if (key.equals("name")) {
name = value;
} else if (key.equals("depends")) {
depends = value;
} else if (key.equals("if")) {
ifCond = value;
} else if (key.equals("unless")) {
unlessCond = value;
} else if (key.equals("id")) {
id = value;
} else if (key.equals("description")) {
description = value;
} else {
throw new SAXParseException("Unexpected attribute \"" + key + "\"", locator);
}
}
if (name == null) {
throw new SAXParseException("target element appears without a name attribute", locator);
}
target = new Target();
target.setName(name);
target.setIf(ifCond);
target.setUnless(unlessCond);
target.setDescription(description);
project.addTarget(name, target);
if (id != null && !id.equals("")) {
project.addReference(id, target);
}
// take care of dependencies
if (depends.length() > 0) {
target.setDepends(depends);
}
}
/**
* Handles the start of an element within a target.
*
* @param tag The name of the element being started.
* Will not be null.
* @param attrs Attributes of the element being started.
* Will not be null.
*
* @exception SAXParseException if an error occurs when initialising
* the appropriate child handler
*/
public void startElement(String uri, String name, String qname, AttributeList attrs)
throws SAXParseException
{
if (project.getDataTypeDefinitions().get(name) != null) {
new DataTypeHandler(this, target).init(name, attrs);
} else {
new TaskHandler(this, target, null, target).init(name, attrs);
}
}
}
/**
* Handler for all task elements.
*/
private class TaskHandler extends AbstractHandler {
/** Containing target, if any. */
private Target target;
/**
* Container for the task, if any. If target is
* non-null, this must be too.
*/
private TaskContainer container;
/**
* Task created by this handler.
*/
private Task task;
/**
* Wrapper for the parent element, if any. The wrapper for this
* element will be added to this wrapper as a child.
*/
private RuntimeConfigurable parentWrapper;
/**
* Wrapper for this element which takes care of actually configuring
* the element, if this element is contained within a target.
* Otherwise the configuration is performed with the configure method.
* @see ProjectHelper#configure(Object,AttributeList,Project)
*/
private RuntimeConfigurable wrapper = null;
/**
* Constructor.
*
* @param parentHandler The handler which should be restored to the
* parser at the end of the element.
* Must not be null.
*
* @param container Container for the element.
* May be null if the target is
* null as well. If the
* target is null, this parameter
* is effectively ignored.
*
* @param parentWrapper Wrapper for the parent element, if any.
* May be null. If the
* target is null, this parameter
* is effectively ignored.
*
* @param target Target this element is part of.
* May be null.
*/
public TaskHandler(DefaultHandler parentHandler, TaskContainer container, RuntimeConfigurable parentWrapper, Target target) {
super(parentHandler);
this.container = container;
this.parentWrapper = parentWrapper;
this.target = target;
}
/**
* Initialisation routine called after handler creation
* with the element name and attributes. This configures
* the element with its attributes and sets it up with
* its parent container (if any). Nested elements are then
* added later as the parser encounters them.
*
* @param tag Name of the element which caused this handler
* to be created. Must not be null.
*
* @param attrs Attributes of the element which caused this
* handler to be created. Must not be null.
*
* @exception SAXParseException in case of error (not thrown in
* this implementation)
*/
public void init(String tag, AttributeList attrs) throws SAXParseException {
try {
task = project.createTask(tag);
} catch (BuildException e) {
// swallow here, will be thrown again in
// UnknownElement.maybeConfigure if the problem persists.
}
if (task == null) {
task = new UnknownElement(tag);
task.setProject(project);
//XXX task.setTaskType(tag);
task.setTaskName(tag);
}
task.setLocation(new Location(buildFile.toString(), locator.getLineNumber(), locator.getColumnNumber()));
configureId(task, attrs);
// Top level tasks don't have associated targets
if (target != null) {
task.setOwningTarget(target);
container.addTask(task);
task.init();
wrapper = task.getRuntimeConfigurableWrapper();
wrapper.setAttributes(attrs);
if (parentWrapper != null) {
parentWrapper.addChild(wrapper);
}
} else {
task.init();
configure(task, attrs, project);
}
}
/**
* Executes the task if it is a top-level one.
*/
protected void finished() {
if (task != null && target == null) {
task.execute();
}
}
/**
* Adds text to the task, using the wrapper if one is
* available (in other words if the task is within a target)
* or using addText otherwise.
*
* @param buf A character array of the text within the element.
* Will not be null.
* @param start The start element in the array.
* @param count The number of characters to read from the array.
*
* @exception SAXParseException if the element doesn't support text
*
* @see ProjectHelper#addText(Project,Object,char[],int,int)
*/
public void characters(char[] buf, int start, int count) throws SAXParseException {
if (wrapper == null) {
try {
addText(project, task, buf, start, count);
} catch (BuildException exc) {
throw new SAXParseException(exc.getMessage(), locator, exc);
}
} else {
wrapper.addText(buf, start, count);
}
}
/**
* Handles the start of an element within a target. Task containers
* will always use another task handler, and all other tasks
* will always use a nested element handler.
*
* @param tag The name of the element being started.
* Will not be null.
* @param attrs Attributes of the element being started.
* Will not be null.
*
* @exception SAXParseException if an error occurs when initialising
* the appropriate child handler
*/
public void startElement(String uri, String name, String qname, AttributeList attrs)
throws SAXParseException
{
if (task instanceof TaskContainer) {
// task can contain other tasks - no other nested elements possible
new TaskHandler(this, (TaskContainer)task, wrapper, target).init(name, attrs);
}
else {
new NestedElementHandler(this, task, wrapper, target).init(name, attrs);
}
}
}
/**
* Handler for all nested properties.
*/
private class NestedElementHandler extends AbstractHandler {
/** Parent object (task/data type/etc). */
private Object parent;
/** The nested element itself. */
private Object child;
/**
* Wrapper for the parent element, if any. The wrapper for this
* element will be added to this wrapper as a child.
*/
private RuntimeConfigurable parentWrapper;
/**
* Wrapper for this element which takes care of actually configuring
* the element, if a parent wrapper is provided.
* Otherwise the configuration is performed with the configure method.
* @see ProjectHelper#configure(Object,AttributeList,Project)
*/
private RuntimeConfigurable childWrapper = null;
/** Target this element is part of, if any. */
private Target target;
/**
* Constructor.
*
* @param parentHandler The handler which should be restored to the
* parser at the end of the element.
* Must not be null.
*
* @param parent Parent of this element (task/data type/etc).
* Must not be null.
*
* @param parentWrapper Wrapper for the parent element, if any.
* May be null.
*
* @param target Target this element is part of.
* May be null.
*/
public NestedElementHandler(DefaultHandler parentHandler,
Object parent,
RuntimeConfigurable parentWrapper,
Target target) {
super(parentHandler);
if (parent instanceof TaskAdapter) {
this.parent = ((TaskAdapter) parent).getProxy();
} else {
this.parent = parent;
}
this.parentWrapper = parentWrapper;
this.target = target;
}
/**
* Initialisation routine called after handler creation
* with the element name and attributes. This configures
* the element with its attributes and sets it up with
* its parent container (if any). Nested elements are then
* added later as the parser encounters them.
*
* @param tag Name of the element which caused this handler
* to be created. Must not be null.
*
* @param attrs Attributes of the element which caused this
* handler to be created. Must not be null.
*
* @exception SAXParseException in case of error, such as a
* BuildException being thrown during configuration.
*/
public void init(String propType, AttributeList attrs) throws SAXParseException {
Class parentClass = parent.getClass();
IntrospectionHelper ih =
IntrospectionHelper.getHelper(parentClass);
try {
String elementName = propType.toLowerCase(Locale.US);
if (parent instanceof UnknownElement) {
UnknownElement uc = new UnknownElement(elementName);
uc.setProject(project);
((UnknownElement) parent).addChild(uc);
child = uc;
} else {
child = ih.createElement(project, parent, elementName);
}
configureId(child, attrs);
if (parentWrapper != null) {
childWrapper = new RuntimeConfigurable(child, propType);
childWrapper.setAttributes(attrs);
parentWrapper.addChild(childWrapper);
} else {
configure(child, attrs, project);
ih.storeElement(project, parent, child, elementName);
}
} catch (BuildException exc) {
throw new SAXParseException(exc.getMessage(), locator, exc);
}
}
/**
* Adds text to the element, using the wrapper if one is
* available or using addText otherwise.
*
* @param buf A character array of the text within the element.
* Will not be null.
* @param start The start element in the array.
* @param count The number of characters to read from the array.
*
* @exception SAXParseException if the element doesn't support text
*
* @see ProjectHelper#addText(Project,Object,char[],int,int)
*/
public void characters(char[] buf, int start, int count) throws SAXParseException {
if (parentWrapper == null) {
try {
addText(project, child, buf, start, count);
} catch (BuildException exc) {
throw new SAXParseException(exc.getMessage(), locator, exc);
}
} else {
childWrapper.addText(buf, start, count);
}
}
/**
* Handles the start of an element within this one. Task containers
* will always use a task handler, and all other elements
* will always use another nested element handler.
*
* @param tag The name of the element being started.
* Will not be null.
* @param attrs Attributes of the element being started.
* Will not be null.
*
* @exception SAXParseException if an error occurs when initialising
* the appropriate child handler
*/
public void startElement(String uri, String name, String qname, AttributeList attrs)
throws SAXParseException
{
if (child instanceof TaskContainer) {
// taskcontainer nested element can contain other tasks - no other
// nested elements possible
new TaskHandler(this, (TaskContainer)child, childWrapper, target).init(name, attrs);
}
else {
new NestedElementHandler(this, child, childWrapper, target).init(name, attrs);
}
}
}
/**
* Handler for all data types directly subordinate to project or target.
*/
private class DataTypeHandler extends AbstractHandler {
/** Parent target, if any. */
private Target target;
/** The element being configured. */
private Object element;
/** Wrapper for this element, if it's part of a target. */
private RuntimeConfigurable wrapper = null;
/**
* Constructor with no target specified.
*
* @param parentHandler The handler which should be restored to the
* parser at the end of the element.
* Must not be null.
*/
public DataTypeHandler(DefaultHandler parentHandler) {
this(parentHandler, null);
}
/**
* Constructor with a target specified.
*
* @param parentHandler The handler which should be restored to the
* parser at the end of the element.
* Must not be null.
*
* @param target The parent target of this element.
* May be null.
*/
public DataTypeHandler(DefaultHandler parentHandler, Target target) {
super(parentHandler);
this.target = target;
}
/**
* Initialisation routine called after handler creation
* with the element name and attributes. This configures
* the element with its attributes and sets it up with
* its parent container (if any). Nested elements are then
* added later as the parser encounters them.
*
* @param tag Name of the element which caused this handler
* to be created. Must not be null.
*
* @param attrs Attributes of the element which caused this
* handler to be created. Must not be null.
*
* @exception SAXParseException in case of error, such as a
* BuildException being thrown during configuration.
*/
public void init(String propType, AttributeList attrs) throws SAXParseException {
try {
element = project.createDataType(propType);
if (element == null) {
throw new BuildException("Unknown data type "+propType);
}
if (target != null) {
wrapper = new RuntimeConfigurable(element, propType);
wrapper.setAttributes(attrs);
target.addDataType(wrapper);
} else {
configure(element, attrs, project);
configureId(element, attrs);
}
} catch (BuildException exc) {
throw new SAXParseException(exc.getMessage(), locator, exc);
}
}
// XXX: (Jon Skeet) Any reason why this doesn't use the wrapper
// if one is available, whereas NestedElementHandler.characters does?
/**
* Adds text to the element.
*
* @param buf A character array of the text within the element.
* Will not be null.
* @param start The start element in the array.
* @param count The number of characters to read from the array.
*
* @exception SAXParseException if the element doesn't support text
*
* @see ProjectHelper#addText(Project,Object,char[],int,int)
*/
public void characters(char[] buf, int start, int count) throws SAXParseException {
try {
addText(project, element, buf, start, count);
} catch (BuildException exc) {
throw new SAXParseException(exc.getMessage(), locator, exc);
}
}
/**
* Handles the start of an element within this one.
* This will always use a nested element handler.
*
* @param tag The name of the element being started.
* Will not be null.
* @param attrs Attributes of the element being started.
* Will not be null.
*
* @exception SAXParseException if an error occurs when initialising
* the child handler
*/
public void startElement(String uri, String name, String qname, AttributeList attrs)
throws SAXParseException
{
new NestedElementHandler(this, element, wrapper, target).init(name, attrs);
}
}
/**
* Returns the parser factory to use. Only one parser
* factory is ever created by this method (multi-threading
* issues aside) and is then cached for future use.
*
* @return a SAXParserFactory to use within this class
*/
private static SAXParserFactory getParserFactory() {
if (parserFactory == null) {
parserFactory = SAXParserFactory.newInstance();
}
return parserFactory;
}
/**
* Scans an attribute list for the id attribute and
* stores a reference to the target object in the project if an
* id is found.
* * This method was moved out of the configure method to allow * it to be executed at parse time. * * @see #configure(Object,AttributeList,Project) */ private void configureId(Object target, AttributeList attr) { String id = attr.getValue("id"); if (id != null) { project.addReference(id, target); } } }