edu.cornell.mannlib.vitro.webapp.auth.permissions.EditByRolePermission.java Source code

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Here is the source code for edu.cornell.mannlib.vitro.webapp.auth.permissions.EditByRolePermission.java

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/* $This file is distributed under the terms of the license in /doc/license.txt$ */

package edu.cornell.mannlib.vitro.webapp.auth.permissions;

import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;

import edu.cornell.mannlib.vitro.webapp.auth.policy.bean.PropertyRestrictionBean;
import edu.cornell.mannlib.vitro.webapp.auth.requestedAction.RequestedAction;
import edu.cornell.mannlib.vitro.webapp.auth.requestedAction.propstmt.AbstractDataPropertyStatementAction;
import edu.cornell.mannlib.vitro.webapp.auth.requestedAction.propstmt.AbstractObjectPropertyStatementAction;
import edu.cornell.mannlib.vitro.webapp.beans.BaseResourceBean.RoleLevel;
import edu.cornell.mannlib.vitro.webapp.beans.Property;

/**
 * Is the user authorized to edit properties that are marked as restricted to a
 * certain "Role Level"?
 */
public class EditByRolePermission extends Permission {
    private static final Log log = LogFactory.getLog(EditByRolePermission.class);

    public static final String NAMESPACE = "java:" + EditByRolePermission.class.getName() + "#";

    private final String roleName;
    private final RoleLevel roleLevel;

    public EditByRolePermission(String roleName, RoleLevel roleLevel) {
        super(NAMESPACE + roleName);

        if (roleName == null) {
            throw new NullPointerException("role may not be null.");
        }
        if (roleLevel == null) {
            throw new NullPointerException("roleLevel may not be null.");
        }

        this.roleName = roleName;
        this.roleLevel = roleLevel;
    }

    /**
     * If the requested action is to edit a property statement, we might
     * authorize it based on their role level.
     */
    @Override
    public boolean isAuthorized(RequestedAction whatToAuth) {
        boolean result;

        if (whatToAuth instanceof AbstractDataPropertyStatementAction) {
            result = isAuthorized((AbstractDataPropertyStatementAction) whatToAuth);
        } else if (whatToAuth instanceof AbstractObjectPropertyStatementAction) {
            result = isAuthorized((AbstractObjectPropertyStatementAction) whatToAuth);
        } else {
            result = false;
        }

        if (result) {
            log.debug(this + " authorizes " + whatToAuth);
        } else {
            log.debug(this + " does not authorize " + whatToAuth);
        }

        return result;
    }

    /**
     * The user may add, edit, or delete this data property if they are allowed
     * to modify its subject and its predicate.
     */
    private boolean isAuthorized(AbstractDataPropertyStatementAction action) {
        String subjectUri = action.getSubjectUri();
        Property predicate = action.getPredicate();
        return canModifyResource(subjectUri) && canModifyPredicate(predicate);
    }

    /**
     * The user may add, edit, or delete this data property if they are allowed
     * to modify its subject, its predicate, and its object.
     */
    private boolean isAuthorized(AbstractObjectPropertyStatementAction action) {
        String subjectUri = action.getSubjectUri();
        Property predicate = action.getPredicate();
        String objectUri = action.getObjectUri();
        return canModifyResource(subjectUri) && canModifyPredicate(predicate) && canModifyResource(objectUri);
    }

    private boolean canModifyResource(String resourceUri) {
        return PropertyRestrictionBean.getBean().canModifyResource(resourceUri, roleLevel);
    }

    private boolean canModifyPredicate(Property predicate) {
        return PropertyRestrictionBean.getBean().canModifyPredicate(predicate, roleLevel);
    }

    @Override
    public String toString() {
        return "EditByRolePermission['" + roleName + "']";
    }

}