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Demoiselle Applet Component ** PROJETO DESCONTINUADO veja https://github.com/demoiselle/signer
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/*
 * Demoiselle Framework
 * Copyright (C) 2010 SERPRO
 * ----------------------------------------------------------------------------
 * This file is part of Demoiselle Framework.
 * 
 * Demoiselle Framework is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public License version 3
 * as published by the Free Software Foundation.
 * 
 * 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 General Public License for more details.
 * 
 * You should have received a copy of the GNU Lesser General Public License version 3
 * along with this program; if not,  see 
 * or write to the Free Software Foundation, Inc., 51 Franklin Street,
 * Fifth Floor, Boston, MA  02110-1301, USA.
 * ----------------------------------------------------------------------------
 * Este arquivo é parte do Framework Demoiselle.
 * 
 * O Framework Demoiselle é um software livre; você pode redistribuí-lo e/ou
 * modificá-lo dentro dos termos da GNU LGPL versão 3 como publicada pela Fundação
 * do Software Livre (FSF).
 * 
 * Este programa é distribuído na esperança que possa ser útil, mas SEM NENHUMA
 * GARANTIA; sem uma garantia implícita de ADEQUAÇÃO a qualquer MERCADO ou
 * APLICAÇÃO EM PARTICULAR. Veja a Licença Pública Geral GNU/LGPL em português
 * para maiores detalhes.
 * 
 * Você deve ter recebido uma cópia da GNU LGPL versão 3, sob o título
 * "LICENCA.txt", junto com esse programa. Se não, acesse 
 * ou escreva para a Fundação do Software Livre (FSF) Inc.,
 * 51 Franklin St, Fifth Floor, Boston, MA 02111-1301, USA.
 */

package br.gov.frameworkdemoiselle.certificate.applet.action;

import java.applet.Applet;
import java.security.KeyStore;
import java.security.KeyStoreException;
import java.security.cert.X509Certificate;

import org.w3c.dom.Node;
import org.w3c.dom.html.HTMLCollection;
import org.w3c.dom.html.HTMLDocument;
import org.w3c.dom.html.HTMLFormElement;
import org.w3c.dom.html.HTMLInputElement;

import com.sun.java.browser.dom.DOMAccessException;
import com.sun.java.browser.dom.DOMAccessor;
import com.sun.java.browser.dom.DOMAction;
import com.sun.java.browser.dom.DOMService;
import com.sun.java.browser.dom.DOMUnsupportedException;

import br.gov.frameworkdemoiselle.certificate.CertificateManager;
import br.gov.frameworkdemoiselle.certificate.applet.certificate.ICPBrasilCertificate;
import netscape.javascript.JSObject;

/**
 * Implementação padrao do AppletExecute que fornece alguns recursos para
 * manipulacao do certificado e html
 * 
 * @author SUPST/STDCS
 * 
 */
@Deprecated
public abstract class AbstractAppletExecute implements AppletExecute {

	@Override
	public abstract void execute(KeyStore keystore, String alias, Applet applet);

	@Override
	public abstract void cancel(KeyStore keystore, String alias, Applet applet);

	/**
	 * Retorn o objeto carregado com as informacoes do certificado ao formato
	 * ICPBrasil
	 * 
	 * @param keystore
	 *            Keystore do dispositivo
	 * @param valid
	 *            Indica se o certificado sera validado
	 * @return
	 * @throws KeyStoreException
	 */
	public ICPBrasilCertificate getICPBrasilCertificate(KeyStore keystore, String alias, boolean valid) throws KeyStoreException {
		if (alias == null || alias.equals(""))
			alias = keystore.aliases().nextElement();
		X509Certificate x509 = (X509Certificate) keystore.getCertificateChain(alias)[0];
		CertificateManager cm = new CertificateManager(x509, valid);
		ICPBrasilCertificate cert = cm.load(ICPBrasilCertificate.class);
		return cert;
	}

	/**
	 * Modifica um elemento do formulario html a partir da applet
	 * 
	 * @param applet
	 *            Applet
	 * @param formName
	 *            Nome do formulario html
	 * @param fieldName
	 *            Nome do campo html
	 * @param value
	 *            Valor do campo html
	 */
	public static void setFormField(Applet applet, String formName, String fieldName, String value) {
		try {
			JSObject window = JSObject.getWindow(applet);
			JSObject document = (JSObject) window.getMember("document");
			JSObject forms = (JSObject) document.getMember("forms");
			JSObject form = (JSObject) forms.getMember(formName);
			JSObject elements = (JSObject) form.getMember("elements");
			JSObject element = (JSObject) elements.getMember(fieldName);
			element.setMember("value", value);
		} catch (Throwable error) {
			// em alguns casos ocorre incompatibilidade com internet explorer.
			// Utilizando a Common API (jre 1.6 ou superior) é possível
			// ter a compatibilidade desejada
			setFormFieldFromCommonAPI(applet, formName, fieldName, value);
		}
	}

	/**
	 * Obtem do formulario html o valor de um campo
	 * 
	 * @param applet
	 *            Applet
	 * @param formName
	 *            Nome do formulario html
	 * @param fieldName
	 *            Nome do campo html
	 * @return Valor do campo
	 */
	public static String getFormField(Applet applet, String formName, String fieldName) {
		String result = "";
		try {
			JSObject window = JSObject.getWindow(applet);
			JSObject document = (JSObject) window.getMember("document");
			JSObject forms = (JSObject) document.getMember("forms");
			JSObject form = (JSObject) forms.getMember(formName);
			JSObject elements = (JSObject) form.getMember("elements");
			JSObject element = (JSObject) elements.getMember(fieldName);
			result = element.eval("value").toString();
		} catch (Throwable error) {
			// em alguns casos ocorre incompatibilidade com internet explorer.
			// Utilizando a Common API (jre 1.6 ou superior) é possível
			// ter a compatibilidade desejada
			result = getFormFieldFromCommonAPI(applet, formName, fieldName);
		}
		return result;
	}

	private static void setFormFieldFromCommonAPI(final Applet applet, final String formName, final String fieldName, final String value) {
		String result = null;
		try {
			DOMService service = DOMService.getService(applet);
			service.invokeAndWait(new DOMAction() {
				@Override
				public Object run(DOMAccessor accessor) {
					HTMLDocument doc = (HTMLDocument) accessor.getDocument(applet);
					HTMLCollection forms = doc.getForms();
					HTMLFormElement form = (HTMLFormElement) forms.namedItem(formName);
					HTMLCollection elements = form.getElements();
					int length = elements.getLength();
					for (int i = 0; i < length; i++) {
						Node node = elements.item(i);
						if (node instanceof HTMLInputElement) {
							HTMLInputElement element = (HTMLInputElement) node;
							if (element.getName().equalsIgnoreCase(fieldName))
								element.setValue(value);
						}
					}
					return "";
				}
			});
		} catch (DOMUnsupportedException e1) {
			result = e1.getMessage();
		} catch (DOMAccessException e2) {
			result = e2.getMessage();
		}
	}

	private static String getFormFieldFromCommonAPI(final Applet applet, final String formName, final String fieldName) {
		String result = null;
		try {
			DOMService service = DOMService.getService(applet);
			result = (String) service.invokeAndWait(new DOMAction() {
				@Override
				public Object run(DOMAccessor accessor) {
					HTMLDocument doc = (HTMLDocument) accessor.getDocument(applet);
					HTMLCollection forms = doc.getForms();
					HTMLFormElement form = (HTMLFormElement) forms.namedItem(formName);
					HTMLCollection elements = form.getElements();
					int length = elements.getLength();
					for (int i = 0; i < length; i++) {
						Node node = elements.item(i);
						if (node instanceof HTMLInputElement) {
							HTMLInputElement element = (HTMLInputElement) node;
							if (element.getName().equalsIgnoreCase(fieldName))
								return element.getValue();
						}
					}
					return "";
				}
			});
		} catch (DOMUnsupportedException e1) {
			result = e1.getMessage();
		} catch (DOMAccessException e2) {
			result = e2.getMessage();
		}
		return result;
	}
}