XpFactory.java

package org.anodyneos.xp;

import java.io.File;
import java.net.URI;

import javax.servlet.Servlet;
import javax.servlet.ServletRequest;
import javax.servlet.ServletResponse;

import org.anodyneos.commons.xml.UnifiedResolver;
import org.anodyneos.commons.xml.xsl.TemplatesCache;
import org.anodyneos.xp.http.HttpXpContext;
import org.anodyneos.xp.standalone.StandaloneXpAppContext;
import org.anodyneos.xp.standalone.StandaloneXpContext;

public abstract class XpFactory {

    private static final String DEFAULT_FACTORY = "org.anodyneos.xpImpl.runtime.XpFactoryImpl";

    public static XpFactory newInstance() throws XpException {
        Class xpFactoryClass = null;

        ClassLoader cl = Thread.currentThread().getContextClassLoader();

        if (null != cl) {
            xpFactoryClass = loadClass(cl, DEFAULT_FACTORY);
        }

        if (null == xpFactoryClass) {
            cl = XpFactory.class.getClassLoader();
            xpFactoryClass = loadClass(cl, DEFAULT_FACTORY);
        }

        if (null == xpFactoryClass) {
            throw new XpException("Cannot find factory class " + DEFAULT_FACTORY);
        } else {
            try {
                XpFactory xpFactory = (XpFactory) xpFactoryClass.newInstance();
                return xpFactory;
            } catch (InstantiationException e) {
                throw new XpException("Cannot create factory class " + DEFAULT_FACTORY, e);
            } catch (IllegalAccessException e) {
                throw new XpException("Cannot create factory class " + DEFAULT_FACTORY, e);
            }
        }
    }

    private static Class loadClass(ClassLoader cl, String name) {
        try {
            Class clazz = cl.loadClass(name);
            return clazz;
        } catch (ClassNotFoundException e) {
            return null;
        }
    }

    // factory methods

    public abstract XpPage newXpPage(URI xpURI)
    throws XpFileNotFoundException, XpTranslationException, XpCompilationException, XpException;

    public abstract StandaloneXpContext getStandaloneXpContext();
    public abstract void releaseStandaloneXpContext(StandaloneXpContext ctx);

    public abstract HttpXpContext getHttpXpContext(
            Servlet servlet, ServletRequest servletRequest,  ServletResponse servletResponse);
    public abstract void releaseHttpXpContext(HttpXpContext ctx);

    // getters and setters

    public abstract ClassLoader getParentLoader();
    public abstract void setParentLoader(ClassLoader parentLoader);

    public abstract File getClassGenDirectory();
    public abstract void setClassGenDirectory(File classRoot);

    public abstract File getJavaGenDirectory();
    public abstract void setJavaGenDirectory(File javaRoot);

    public abstract URI getXpRegistryURI();
    public abstract void setXpRegistryURI(URI xpRegistry);

    public abstract StandaloneXpAppContext getStandaloneXpAppContext();
    public abstract void setStandaloneXpAppContext(StandaloneXpAppContext appCtx);

    public abstract UnifiedResolver getResolver();
    public abstract void setResolver(UnifiedResolver resolver);

    public abstract TemplatesCache getTemplatesCache();
    public abstract void setTemplatesCache(TemplatesCache templatesCache);

    public abstract boolean isAutoLoad();
    public abstract void setAutoLoad(boolean autoLoad);

    public abstract String getCompileClassPath();

}