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This is the master POM file for Oracle's Implementation of the JSF 2.2 Specification.
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/*
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 *
 * Copyright (c) 1997-2010 Oracle and/or its affiliates. All rights reserved.
 *
 * The contents of this file are subject to the terms of either the GNU
 * General Public License Version 2 only ("GPL") or the Common Development
 * and Distribution License("CDDL") (collectively, the "License").  You
 * may not use this file except in compliance with the License.  You can
 * obtain a copy of the License at
 * https://glassfish.dev.java.net/public/CDDL+GPL_1_1.html
 * or packager/legal/LICENSE.txt.  See the License for the specific
 * language governing permissions and limitations under the License.
 *
 * When distributing the software, include this License Header Notice in each
 * file and include the License file at packager/legal/LICENSE.txt.
 *
 * GPL Classpath Exception:
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 * exception as provided by Oracle in the GPL Version 2 section of the License
 * file that accompanied this code.
 *
 * Modifications:
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 * enclosed by brackets [] replaced by your own identifying information:
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 * elects to include this software in this distribution under the [CDDL or GPL
 * Version 2] license."  If you don't indicate a single choice of license, a
 * recipient has the option to distribute your version of this file under
 * either the CDDL, the GPL Version 2 or to extend the choice of license to
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 * and therefore, elected the GPL Version 2 license, then the option applies
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 */

package com.sun.faces.application;

import java.beans.PropertyEditorSupport;

/**
 * Abstract base for a {@link java.beans.PropertyEditor} that delegates to a
 * faces Converter that was registered by-type in a faces-config descriptor.
 * Concrete implementations (such as generated by {@link
 * ConverterPropertyEditorFactory}) will override {@link #getTargetClass}. (This
 * is based on the original ConverterPropertyEditor code).
 */
public abstract class ConverterPropertyEditorBase
      extends PropertyEditorSupport {
    /**
     * Return the target class of the objects that are being edited. This is used
     * as a key to find the appropriate {@link javax.faces.convert.Converter} from
     * the Faces application.
     *
     * @return the target class.
     */
    protected abstract Class getTargetClass();

    /**
     * Convert the textValue to an object of type {@link
     * #getTargetClass} by delegating to a converter in the faces Application.
     */
    @Override
    public void setAsText(String textValue) throws IllegalArgumentException {
        try {
            Object appAssociate = getPropertyEditorHelper();
            // Get targetClass for the current ClassLoader
            Class targetClass = Thread.currentThread()
                  .getContextClassLoader()
                  .loadClass(getTargetClass().getName());
            Object value = appAssociate.getClass()
                  .getMethod("convertToObject", Class.class, String.class)
                  .invoke(
                        appAssociate, targetClass, textValue);
            if (value != null) {
                setValue(value);
            }
        } catch (RuntimeException e) {
            throw e;
        } catch (Exception e) {
            throw new IllegalStateException(
                  "Unexpected Error attempting to use this ConverterPropertyEditor.  You're deployment environment may not support"
                  + "ConverterPropertyEditors.  Try restarting your server or disabling "
                  + "com.sun.faces.registerConverterPropertyEditors", e);
        }
    }

    private Object getPropertyEditorHelper() throws Exception {
        // Load the current
        Class facesContextClass =
              Thread.currentThread().getContextClassLoader().loadClass(
                    "com.sun.faces.application.ApplicationAssociate");
        // get the current context version of this class in case
        Object appAssociate =
              facesContextClass.getMethod("getCurrentInstance").invoke(null);
        if (appAssociate == null) {
            throw new IllegalStateException(
                  "Unable to find Deployed JSF Application.  You're deployment environment may not support"
                  + "ConverterPropertyEditors.  Try restarting your server or turn off "
                  + "com.sun.faces.registerConverterPropertyEditors");
        }
        Object propertyEditorHelper = appAssociate.getClass()
              .getMethod("getPropertyEditorHelper").invoke(appAssociate);
        return propertyEditorHelper;
    }

    /**
     * Convert an object of type {@link #getTargetClass} to text by delegating to a
     * converter obtained from the Faces Application.
     */
    @Override
    public String getAsText() {
        try {
            Object application = getPropertyEditorHelper();
            Class targetClass = Thread.currentThread()
                  .getContextClassLoader()
                  .loadClass(getTargetClass().getName());
            String text = (String) application.getClass()
                  .getMethod("convertToString", Class.class, Object.class)
                  .invoke(application, targetClass, getValue());
            if (text != null) {
                return text;
            } else {
                return super.getAsText();
            }
        } catch (Exception e) {
            return super.getAsText();
        }
    }
}