springworkflowdescriptorfactory.java

一个很好实用的工作流OSWORKFLOW开发例子.有着非常优秀的灵活性.

/*
 * Copyright (c) 2002-2003 by OpenSymphony
 * All rights reserved.
 */
package com.opensymphony.workflow.spi.hibernate;

import com.opensymphony.workflow.InvalidWorkflowDescriptorException;
import com.opensymphony.workflow.loader.WorkflowDescriptor;
import com.opensymphony.workflow.loader.WorkflowLoader;

import org.springframework.beans.factory.FactoryBean;

import org.springframework.core.io.Resource;

import org.xml.sax.SAXException;

import java.io.IOException;


/**
 * DOCUMENT ME!
 *
 * @author $author$
 * @version $Revision: 1.1 $
 */
public class SpringWorkflowDescriptorFactory implements FactoryBean {
    //~ Instance fields ////////////////////////////////////////////////////////

    /** The descriptor resource. */
    private Resource descriptorResource;

    /** Should the descriptor be reloaded on each call. */
    private boolean reload;

    //~ Methods ////////////////////////////////////////////////////////////////

    public final void setDescriptorResource(final Resource inDescriptorResource) {
        this.descriptorResource = inDescriptorResource;
    }

    public Object getObject() throws InvalidWorkflowDescriptorException, SAXException, IOException {
        return WorkflowLoader.load(this.descriptorResource.getInputStream(), false);
    }

    public Class getObjectType() {
        return WorkflowDescriptor.class;
    }

    public final void setReload(final boolean inReload) {
        this.reload = inReload;
    }

    public boolean isSingleton() {
        return !this.reload;
    }
}