/**
* Licensed under the Common Development and Distribution License,
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.sun.com/cddl/
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or
* implied. See the License for the specific language governing
* permissions and limitations under the License.
*/
package com.sun.facelets.compiler;
import java.util.ArrayList;
import java.util.List;
import java.util.Stack;
import java.util.logging.Level;
import java.util.logging.Logger;
import com.sun.facelets.FaceletHandler;
import com.sun.facelets.tag.Tag;
import com.sun.facelets.tag.TagAttribute;
import com.sun.facelets.tag.TagAttributeException;
import com.sun.facelets.tag.TagAttributes;
import com.sun.facelets.tag.TagDecorator;
import com.sun.facelets.tag.TagException;
import com.sun.facelets.tag.TagLibrary;
import com.sun.facelets.tag.ui.ComponentRefHandler;
import com.sun.facelets.tag.ui.CompositionHandler;
import com.sun.facelets.tag.ui.UILibrary;
/**
* Compilation unit for managing the creation of a single FaceletHandler based
* on events from an XML parser.
*
* @see com.sun.facelets.compiler.Compiler
*
* @author Jacob Hookom
* @version $Id: CompilationManager.java,v 1.14 2007/09/24 06:33:29 rlubke Exp $
*/
final class CompilationManager {
private final static Logger log = Logger.getLogger("facelets.compiler");
private final Compiler compiler;
private final TagLibrary tagLibrary;
private final TagDecorator tagDecorator;
private final NamespaceManager namespaceManager;
private final Stack units;
private int tagId;
private boolean finished;
private final String alias;
public CompilationManager(String alias, Compiler compiler) {
// this is our alias
this.alias = alias;
// grab compiler state
this.compiler = compiler;
this.tagDecorator = compiler.createTagDecorator();
this.tagLibrary = compiler.createTagLibrary();
// namespace management
this.namespaceManager = new NamespaceManager();
// tag uids
this.tagId = 0;
// for composition use
this.finished = false;
// our compilationunit stack
this.units = new Stack();
this.units.push(new CompilationUnit());
}
public void writeInstruction(String value) {
if (this.finished) {
return;
}
// don't carelessly add empty tags
if (value.length() == 0) {
return;
}
TextUnit unit;
if (this.currentUnit() instanceof TextUnit) {
unit = (TextUnit) this.currentUnit();
} else {
unit = new TextUnit(this.alias, this.nextTagId());
this.startUnit(unit);
}
unit.writeInstruction(value);
}
public void writeText(String value) {
if (this.finished) {
return;
}
// don't carelessly add empty tags
if (value.length() == 0) {
return;
}
TextUnit unit;
if (this.currentUnit() instanceof TextUnit) {
unit = (TextUnit) this.currentUnit();
} else {
unit = new TextUnit(this.alias, this.nextTagId());
this.startUnit(unit);
}
unit.write(value);
}
public void writeComment(String text) {
if (this.compiler.isTrimmingComments())
return;
if (this.finished) {
return;
}
// don't carelessly add empty tags
if (text.length() == 0) {
return;
}
TextUnit unit;
if (this.currentUnit() instanceof TextUnit) {
unit = (TextUnit) this.currentUnit();
} else {
unit = new TextUnit(this.alias, this.nextTagId());
this.startUnit(unit);
}
unit.writeComment(text);
}
public void writeWhitespace(String text) {
if (!this.compiler.isTrimmingWhitespace()) {
this.writeText(text);
}
}
private String nextTagId() {
return Integer.toHexString(Math.abs(this.alias.hashCode() ^ 13 * this.tagId++));
}
public void pushTag(Tag orig) {
if (this.finished) {
return;
}
if (log.isLoggable(Level.FINE)) {
log.fine("Tag Pushed: " + orig);
}
Tag t = this.tagDecorator.decorate(orig);
String[] qname = this.determineQName(t);
t = this.trimAttributes(t);
boolean handled = false;
if (isTrimmed(qname[0], qname[1])) {
log.fine("Composition Found, Popping Parent Tags");
this.units.clear();
NamespaceUnit nsUnit = this.namespaceManager
.toNamespaceUnit(this.tagLibrary);
this.units.push(nsUnit);
this.startUnit(new TrimmedTagUnit(this.tagLibrary, qname[0], qname[1], t, this
.nextTagId()));
log.fine("New Namespace and [Trimmed] TagUnit pushed");
} else if (isRemove(qname[0], qname[1])) {
this.units.push(new RemoveUnit());
} else if (this.tagLibrary.containsTagHandler(qname[0], qname[1])) {
this.startUnit(new TagUnit(this.tagLibrary, qname[0], qname[1], t, this.nextTagId()));
} else if (this.tagLibrary.containsNamespace(qname[0])) {
throw new TagException(orig, "Tag Library supports namespace: "+qname[0]+", but no tag was defined for name: "+qname[1]);
} else {
TextUnit unit;
if (this.currentUnit() instanceof TextUnit) {
unit = (TextUnit) this.currentUnit();
} else {
unit = new TextUnit(this.alias, this.nextTagId());
this.startUnit(unit);
}
unit.startTag(t);
}
}
public void popTag() {
if (this.finished) {
return;
}
CompilationUnit unit = this.currentUnit();
if (unit instanceof TextUnit) {
TextUnit t = (TextUnit) unit;
if (t.isClosed()) {
this.finishUnit();
} else {
t.endTag();
return;
}
}
unit = this.currentUnit();
if (unit instanceof TagUnit) {
TagUnit t = (TagUnit) unit;
if (t instanceof TrimmedTagUnit) {
this.finished = true;
return;
}
}
this.finishUnit();
}
public void popNamespace(String ns) {
this.namespaceManager.popNamespace(ns);
if (this.currentUnit() instanceof NamespaceUnit) {
this.finishUnit();
}
}
public void pushNamespace(String prefix, String uri) {
if (log.isLoggable(Level.FINE)) {
log.fine("Namespace Pushed " + prefix + ": " + uri);
}
this.namespaceManager.pushNamespace(prefix, uri);
NamespaceUnit unit;
if (this.currentUnit() instanceof NamespaceUnit) {
unit = (NamespaceUnit) this.currentUnit();
} else {
unit = new NamespaceUnit(this.tagLibrary);
this.startUnit(unit);
}
unit.setNamespace(prefix, uri);
}
public FaceletHandler createFaceletHandler() {
return ((CompilationUnit) this.units.get(0)).createFaceletHandler();
}
private CompilationUnit currentUnit() {
if (!this.units.isEmpty()) {
return (CompilationUnit) this.units.peek();
}
return null;
}
private void finishUnit() {
Object obj = this.units.pop();
if (log.isLoggable(Level.FINE)) {
log.fine("Finished Unit: " + obj);
}
}
private CompilationUnit searchUnits(Class type) {
CompilationUnit unit = null;
int i = this.units.size();
while (unit == null && --i >= 0) {
if (type.isAssignableFrom(this.units.get(i).getClass())) {
unit = (CompilationUnit) this.units.get(i);
}
}
return unit;
}
private void startUnit(CompilationUnit unit) {
if (log.isLoggable(Level.FINE)) {
log.fine("Starting Unit: " + unit + " and adding it to parent: "
+ this.currentUnit());
}
this.currentUnit().addChild(unit);
this.units.push(unit);
}
private Tag trimAttributes(Tag tag) {
Tag t = this.trimJSFCAttribute(tag);
t = this.trimNSAttributes(t);
return t;
}
protected static boolean isRemove(String ns, String name) {
return UILibrary.Namespace.equals(ns)
&& "remove".equals(name);
}
protected static boolean isTrimmed(String ns, String name) {
return UILibrary.Namespace.equals(ns)
&& (CompositionHandler.Name.equals(name) || ComponentRefHandler.Name.equals(name));
}
private String[] determineQName(Tag tag) {
TagAttribute attr = tag.getAttributes().get("jsfc");
if (attr != null) {
if (log.isLoggable(Level.FINE)) {
log.fine(attr + " JSF Facelet Compile Directive Found");
}
String value = attr.getValue();
String namespace, localName;
int c = value.indexOf(':');
if (c == -1) {
namespace = this.namespaceManager.getNamespace("");
localName = value;
} else {
String prefix = value.substring(0, c);
namespace = this.namespaceManager.getNamespace(prefix);
if (namespace == null) {
throw new TagAttributeException(tag, attr,
"No Namespace matched for: " + prefix);
}
localName = value.substring(c + 1);
}
return new String[] { namespace, localName };
} else {
return new String[] { tag.getNamespace(), tag.getLocalName() };
}
}
private Tag trimJSFCAttribute(Tag tag) {
TagAttribute attr = tag.getAttributes().get("jsfc");
if (attr != null) {
TagAttribute[] oa = tag.getAttributes().getAll();
TagAttribute[] na = new TagAttribute[oa.length - 1];
int p = 0;
for (int i = 0; i < oa.length; i++) {
if (!"jsfc".equals(oa[i].getLocalName())) {
na[p++] = oa[i];
}
}
return new Tag(tag, new TagAttributes(na));
}
return tag;
}
private Tag trimNSAttributes(Tag tag) {
TagAttribute[] attr = tag.getAttributes().getAll();
int remove = 0;
for (int i = 0; i < attr.length; i++) {
if (attr[i].getQName().startsWith("xmlns")
&& this.tagLibrary.containsNamespace(attr[i].getValue())) {
remove |= 1 << i;
if (log.isLoggable(Level.FINE)) {
log.fine(attr[i] + " Namespace Bound to TagLibrary");
}
}
}
if (remove == 0) {
return tag;
} else {
List attrList = new ArrayList(attr.length);
int p = 0;
for (int i = 0; i < attr.length; i++) {
p = 1 << i;
if ((p & remove) == p) {
continue;
}
attrList.add(attr[i]);
}
attr = (TagAttribute[]) attrList.toArray(new TagAttribute[attrList
.size()]);
return new Tag(tag.getLocation(), tag.getNamespace(), tag
.getLocalName(), tag.getQName(), new TagAttributes(attr));
}
}
}