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/**
* Copyright (c) 2012, Ben Fortuna
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* o Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
*
* o Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* o Neither the name of Ben Fortuna nor the names of any other contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
* PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
* LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
* NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
package net.fortuna.ical4j.model;
import net.fortuna.ical4j.model.component.XComponent;
import net.fortuna.ical4j.util.CompatibilityHints;
import java.io.IOException;
import java.io.ObjectInputStream;
import java.util.ServiceLoader;
/**
* $Id$ [05-Apr-2004]
*
* A factory for creating iCalendar components. Note that if relaxed parsing is enabled (via specifying the system
* property: icalj.parsing.relaxed=true) illegal component names are allowed.
*
* @author Ben Fortuna
*/
public final class ComponentFactoryImpl extends AbstractContentFactory {
private static ComponentFactoryImpl instance = new ComponentFactoryImpl();
/**
* Constructor made private to prevent instantiation.
*/
private ComponentFactoryImpl() {
super(ServiceLoader.load(ComponentFactory.class, ComponentFactory.class.getClassLoader()));
}
/**
* @return Returns the instance.
*/
public static ComponentFactoryImpl getInstance() {
return instance;
}
@Override
protected boolean factorySupports(ComponentFactory factory, String key) {
return factory.supports(key);
}
/**
* @param name a component name
* @return a new component instance of the specified type
*/
public T createComponent(final String name) {
Component component;
ComponentFactory factory = getFactory(name);
if (factory != null) {
component = factory.createComponent();
} else if (isExperimentalName(name)) {
component = new XComponent(name);
} else if (allowIllegalNames()) {
component = new XComponent(name);
} else {
throw new IllegalArgumentException("Unsupported component [" + name + "]");
}
return (T) component;
}
/**
* Creates a component.
*
* @param name name of the component
* @param properties a list of component properties
* @return a component
*/
@SuppressWarnings("unchecked")
public T createComponent(final String name, final PropertyList properties) {
Component component;
ComponentFactory factory = getFactory(name);
if (factory != null) {
component = factory.createComponent(properties);
} else if (isExperimentalName(name)) {
component = new XComponent(name, properties);
} else if (allowIllegalNames()) {
component = new XComponent(name, properties);
} else {
throw new IllegalArgumentException("Unsupported component [" + name + "]");
}
return (T) component;
}
/**
* Creates a component which contains sub-components. Currently the only such component is VTIMEZONE.
*
* @param name name of the component
* @param properties a list of component properties
* @param components a list of sub-components (namely standard/daylight timezones)
* @return a component
*/
@SuppressWarnings("unchecked")
public T createComponent(final String name, final PropertyList properties,
final ComponentList components) {
Component component;
ComponentFactory factory = getFactory(name);
if (factory != null) {
component = factory.createComponent(properties, components);
} else {
throw new IllegalArgumentException("Unsupported component [" + name + "]");
}
return (T) component;
}
/**
* @param name
* @return
*/
private boolean isExperimentalName(final String name) {
return name.startsWith(Component.EXPERIMENTAL_PREFIX)
&& name.length() > Component.EXPERIMENTAL_PREFIX.length();
}
/**
* @return true if non-standard names are allowed, otherwise false
*/
protected boolean allowIllegalNames() {
return CompatibilityHints
.isHintEnabled(CompatibilityHints.KEY_RELAXED_PARSING);
}
/**
* Needed for initializing the transient member after deserializing a Calendar
*
* @param in
*
*/
private void readObject(ObjectInputStream in) throws IOException, ClassNotFoundException {
in.defaultReadObject();
this.factoryLoader = ServiceLoader.load(ComponentFactory.class, ComponentFactory.class.getClassLoader());
}
}
