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Parses XML to PDF, with CSS support, using iText
/*
* $Id: f6b945ef89ab649b6d750cbdf20fd4033975da1e $
*
* This file is part of the iText (R) project.
* Copyright (c) 1998-2016 iText Group NV
* Authors: Balder Van Camp, Emiel Ackermann, et al.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU Affero General Public License version 3
* as published by the Free Software Foundation with the addition of the
* following permission added to Section 15 as permitted in Section 7(a):
* FOR ANY PART OF THE COVERED WORK IN WHICH THE COPYRIGHT IS OWNED BY
* ITEXT GROUP. ITEXT GROUP DISCLAIMS THE WARRANTY OF NON INFRINGEMENT
* OF THIRD PARTY RIGHTS
*
* This program is distributed in the hope that it will be useful, but
* WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
* or FITNESS FOR A PARTICULAR PURPOSE.
* See the GNU Affero General Public License for more details.
* You should have received a copy of the GNU Affero General Public License
* along with this program; if not, see http://www.gnu.org/licenses or write to
* the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
* Boston, MA, 02110-1301 USA, or download the license from the following URL:
* http://itextpdf.com/terms-of-use/
*
* The interactive user interfaces in modified source and object code versions
* of this program must display Appropriate Legal Notices, as required under
* Section 5 of the GNU Affero General Public License.
*
* In accordance with Section 7(b) of the GNU Affero General Public License,
* a covered work must retain the producer line in every PDF that is created
* or manipulated using iText.
*
* You can be released from the requirements of the license by purchasing
* a commercial license. Buying such a license is mandatory as soon as you
* develop commercial activities involving the iText software without
* disclosing the source code of your own applications.
* These activities include: offering paid services to customers as an ASP,
* serving PDFs on the fly in a web application, shipping iText with a closed
* source product.
*
* For more information, please contact iText Software Corp. at this
* address: [email protected]
*/
package com.itextpdf.tool.xml.html;
import com.itextpdf.tool.xml.exceptions.LocaleMessages;
import com.itextpdf.tool.xml.exceptions.NoTagProcessorException;
import java.util.Map;
import java.util.concurrent.ConcurrentHashMap;
/**
* A Default implementation of the TagProcessorFactory that uses a map to store
* the TagProcessors. Within the same {@link ClassLoader}s this Processor can
* also load the processors when they are only stored with there fully qualified
* class names.
* Note: this implementation does not use namespaces (yet)!
*
*
* @author redlab_b
*
*/
public class DefaultTagProcessorFactory implements TagProcessorFactory {
/**
* Internal Object to keep TagProcessors.
* @author redlab_b
*
*/
protected final class FactoryObject {
private final String className;
private TagProcessor proc;
/**
* @param className the fully qualified class name
*
*/
public FactoryObject(final String className) {
this.className = className;
}
/**
* @param className the fully qualified class name
* @param processor the processor object
*/
public FactoryObject(final String className, final TagProcessor processor) {
this(className);
this.proc = processor;
}
/**
*
* @return the className
*/
public String getClassName() {
return this.className;
}
/**
* @return return the processor
*/
public TagProcessor getProcessor() {
if (null == this.proc) {
this.proc = load(this.className);
}
return proc;
}
}
private final Map map;
/**
*
*/
public DefaultTagProcessorFactory() {
this.map = new ConcurrentHashMap();
}
/**
* Tries to load given processor with Class.forName
* @param className fully qualified className
* @return the loaded tag processor
* @throws NoTagProcessorException if TagProcessor could not be loaded.
*/
protected TagProcessor load(final String className) throws NoTagProcessorException {
try {
Class c = Class.forName(className);
return (TagProcessor) c.newInstance();
} catch (LinkageError e) {
throw new NoTagProcessorException(String.format(LocaleMessages.getInstance().getMessage(LocaleMessages.NO_TAGPROCESSOR), className));
} catch (ClassNotFoundException e) {
throw new NoTagProcessorException(String.format(LocaleMessages.getInstance().getMessage(LocaleMessages.NO_TAGPROCESSOR), className), e);
} catch (InstantiationException e) {
throw new NoTagProcessorException(String.format(LocaleMessages.getInstance().getMessage(LocaleMessages.NO_TAGPROCESSOR), className), e);
} catch (IllegalAccessException e) {
throw new NoTagProcessorException(String.format(LocaleMessages.getInstance().getMessage(LocaleMessages.NO_TAGPROCESSOR), className), e);
}
}
/**
* Tries to load given processor with Class.forName
*
* @param className fully qualified className
* @param loader the classloader to use
* @return the loaded tag processor
* @throws NoTagProcessorException if TagProcessor could not be loaded.
*/
protected TagProcessor load(final String className, final ClassLoader loader) throws NoTagProcessorException {
try {
Class c = loader.loadClass(className);
return (TagProcessor) c.newInstance();
} catch (LinkageError e) {
throw new NoTagProcessorException(String.format(
LocaleMessages.getInstance().getMessage(LocaleMessages.NO_TAGPROCESSOR), className));
} catch (ClassNotFoundException e) {
throw new NoTagProcessorException(String.format(
LocaleMessages.getInstance().getMessage(LocaleMessages.NO_TAGPROCESSOR), className), e);
} catch (InstantiationException e) {
throw new NoTagProcessorException(String.format(
LocaleMessages.getInstance().getMessage(LocaleMessages.NO_TAGPROCESSOR), className), e);
} catch (IllegalAccessException e) {
throw new NoTagProcessorException(String.format(
LocaleMessages.getInstance().getMessage(LocaleMessages.NO_TAGPROCESSOR), className), e);
}
}
/**
* @throws NoTagProcessorException when the processor was not found for the given tag.
*/
public TagProcessor getProcessor(final String tag, final String nameSpace) {
FactoryObject fo = map.get(tag.toLowerCase());
if (fo != null) {
return fo.getProcessor();
}
throw new NoTagProcessorException(tag);
}
/**
* Add an unloaded TagProcessor.
*
* @param tag the tag the processor with the given className maps to
* @param className the fully qualified class name (class has to be found on classpath, will be loaded with Class.forName()
*/
public void addProcessor(final String tag, final String className) {
map.put(tag, new FactoryObject(className));
}
/**
* Add a loaded TagProcessor.
*
* @param tag the tag the processor with the given className maps to
* @param processor the TagProcessor
*/
public void addProcessor(final String tag, final TagProcessor processor) {
map.put(tag, new FactoryObject(processor.getClass().getName(), processor));
}
/**
*
*/
public void addProcessor( final TagProcessor processor, final String ... tags) {
for (String tag : tags) {
addProcessor(tag, processor);
}
}
/**
* Add one tag processor that handles multiple tags.
* @param className the fully qualified class name (class has to be found on classpath)
* @param tags list of tags this processor maps to.
*/
public void addProcessor( final String className, final String ... tags) {
for (String tag : tags) {
addProcessor(tag, className);
}
}
/* (non-Javadoc)
* @see com.itextpdf.tool.xml.html.TagProcessorFactory#removeProcessor(java.lang.String)
*/
public void removeProcessor(final String tag) {
map.remove(tag);
}
}