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BasicLTI Utilities are a set of utility classes to aid in the development of BasicLTI consumers and providers. They deal with much of the heavy lifting and make the process more opaque to the developer.

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package org.imsglobal.lti.launch;

import javax.servlet.http.HttpServletRequest;
import java.util.Map;

/**
 * Created by paul on 5/28/14.
 */
public class LtiLaunch {

    private LtiUser user;

    private String version;
    private String messageType;
    private String resourceLinkId;

    private String contextId;
    private String launchPresentationReturnUrl;
    private String toolConsumerInstanceGuid;

    public LtiLaunch(HttpServletRequest request) {
        this.user = new LtiUser(request);
        this.version = request.getParameter("lti_version");
        this.messageType = request.getParameter("lti_message_type");
        this.resourceLinkId = request.getParameter("resource_link_id");
        this.contextId = request.getParameter("context_id");
        this.launchPresentationReturnUrl = request.getParameter("launch_presentation_return_url");
        this.toolConsumerInstanceGuid = request.getParameter("tool_consumer_instance_guid");
    }

    public LtiLaunch(Map parameters) {
        this.user = new LtiUser(parameters);
        this.version = parameters.get("lti_version");
        this.messageType = parameters.get("lti_message_type");
        this.resourceLinkId = parameters.get("resource_link_id");
        this.contextId = parameters.get("context_id");
        this.launchPresentationReturnUrl = parameters.get("launch_presentation_return_url");
        this.toolConsumerInstanceGuid = parameters.get("tool_consumer_instance_guid");
    }

    public LtiUser getUser() {
        return user;
    }

    public void setUser(LtiUser user) {
        this.user = user;
    }

    public String getVersion() {
        return version;
    }

    public void setVersion(String version) {
        this.version = version;
    }

    public String getMessageType() {
        return messageType;
    }

    public void setMessageType(String messageType) {
        this.messageType = messageType;
    }

    public String getResourceLinkId() {
        return resourceLinkId;
    }

    public void setResourceLinkId(String resourceLinkId) {
        this.resourceLinkId = resourceLinkId;
    }

    public String getContextId() {
        return contextId;
    }

    public void setContextId(String contextId) {
        this.contextId = contextId;
    }

    public String getLaunchPresentationReturnUrl() {
        return launchPresentationReturnUrl;
    }

    public void setLaunchPresentationReturnUrl(String launchPresentationReturnUrl) {
        this.launchPresentationReturnUrl = launchPresentationReturnUrl;
    }

    public String getToolConsumerInstanceGuid() {
        return toolConsumerInstanceGuid;
    }

    public void setToolConsumerInstanceGuid(String toolConsumerInstanceGuid) {
        this.toolConsumerInstanceGuid = toolConsumerInstanceGuid;
    }
}