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EE4J Compatible Implementation for Jakarta Faces API
/*
* Copyright (c) 1997, 2018 Oracle and/or its affiliates. All rights reserved.
*
* This program and the accompanying materials are made available under the
* terms of the Eclipse Public License v. 2.0, which is available at
* http://www.eclipse.org/legal/epl-2.0.
*
* This Source Code may also be made available under the following Secondary
* Licenses when the conditions for such availability set forth in the
* Eclipse Public License v. 2.0 are satisfied: GNU General Public License,
* version 2 with the GNU Classpath Exception, which is available at
* https://www.gnu.org/software/classpath/license.html.
*
* SPDX-License-Identifier: EPL-2.0 OR GPL-2.0 WITH Classpath-exception-2.0
*/
package com.sun.faces.facelets.compiler;
import com.sun.faces.facelets.tag.CompositeTagDecorator;
import com.sun.faces.facelets.tag.CompositeTagLibrary;
import com.sun.faces.facelets.tag.TagLibrary;
import com.sun.faces.facelets.util.ReflectionUtil;
import com.sun.faces.util.FacesLogger;
import com.sun.faces.util.Util;
import javax.el.ExpressionFactory;
import javax.faces.context.FacesContext;
import javax.faces.view.facelets.FaceletException;
import javax.faces.view.facelets.FaceletHandler;
import javax.faces.view.facelets.TagDecorator;
import java.io.IOException;
import java.net.URL;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import java.util.logging.Level;
import java.util.logging.Logger;
/**
* A Compiler instance may handle compiling multiple sources
*
* @author Jacob Hookom
* @version $Id$
*/
public abstract class Compiler {
protected final static Logger log = FacesLogger.FACELETS_COMPILER.getLogger();
public final static String EXPRESSION_FACTORY = "compiler.ExpressionFactory";
private static final TagLibrary EMPTY_LIBRARY = new CompositeTagLibrary(
new TagLibrary[0]);
private static final TagDecorator EMPTY_DECORATOR = new CompositeTagDecorator(
new TagDecorator[0]);
private boolean validating = false;
private boolean trimmingWhitespace = false;
private boolean trimmingComments = false;
private final List libraries = new ArrayList();
private final List decorators = new ArrayList();
private final Map features = new HashMap();
/**
*
*/
public Compiler() {
}
public final FaceletHandler compile(URL src, String alias)
throws IOException {
//if (!this.initialized)
// this.initialize();
return this.doCompile(src, alias);
}
public final FaceletHandler metadataCompile(URL src, String alias)
throws IOException {
return this.doMetadataCompile(src, alias);
}
protected abstract FaceletHandler doMetadataCompile(URL src, String alias)
throws IOException;
protected abstract FaceletHandler doCompile(URL src, String alias)
throws IOException;
public final TagDecorator createTagDecorator() {
if (this.decorators.size() > 0) {
return new CompositeTagDecorator((TagDecorator[]) this.decorators
.toArray(new TagDecorator[this.decorators.size()]));
}
return EMPTY_DECORATOR;
}
public final void addTagDecorator(TagDecorator decorator) {
Util.notNull("decorator", decorator);
if (!this.decorators.contains(decorator)) {
this.decorators.add(decorator);
}
}
public final ExpressionFactory createExpressionFactory() {
ExpressionFactory el = null;
el = (ExpressionFactory) this.featureInstance(EXPRESSION_FACTORY);
if (el == null) {
try {
el = FacesContext.getCurrentInstance().getApplication()
.getExpressionFactory();
if (el == null) {
if (log.isLoggable(Level.WARNING)) {
log.warning("No default ExpressionFactory from Faces Implementation, attempting to load from Feature["
+ EXPRESSION_FACTORY + "]");
}
}
} catch (Exception e) {
if (log.isLoggable(Level.FINEST)) {
log.log(Level.FINEST, "Unable to get ExpressionFactory because of: ", e);
}
}
}
if (el == null) {
this.features.put(EXPRESSION_FACTORY, "com.sun.el.ExpressionFactoryImpl");
el = (ExpressionFactory) this.featureInstance(EXPRESSION_FACTORY);
}
return el;
}
private final Object featureInstance(String name) {
String type = (String) this.features.get(name);
if (type != null) {
try {
return ReflectionUtil.forName(type).newInstance();
} catch (ClassNotFoundException | InstantiationException | IllegalAccessException t) {
throw new FaceletException("Could not instantiate feature["
+ name + "]: " + type);
}
}
return null;
}
public final TagLibrary createTagLibrary(CompilationMessageHolder unit) {
if (this.libraries.size() > 0) {
return new CompositeTagLibrary((TagLibrary[]) this.libraries
.toArray(new TagLibrary[this.libraries.size()]), unit);
}
return EMPTY_LIBRARY;
}
public final void addTagLibrary(TagLibrary library) {
Util.notNull("library", library);
if (!this.libraries.contains(library)) {
this.libraries.add(library);
}
}
public final void setFeature(String name, String value) {
this.features.put(name, value);
}
public final String getFeature(String name) {
return (String) this.features.get(name);
}
public final boolean isTrimmingComments() {
return this.trimmingComments;
}
public final void setTrimmingComments(boolean trimmingComments) {
this.trimmingComments = trimmingComments;
}
public final boolean isTrimmingWhitespace() {
return this.trimmingWhitespace;
}
public final void setTrimmingWhitespace(boolean trimmingWhitespace) {
this.trimmingWhitespace = trimmingWhitespace;
}
public final boolean isValidating() {
return this.validating;
}
public final void setValidating(boolean validating) {
this.validating = validating;
}
}