77 lines
2.3 KiB
Java
77 lines
2.3 KiB
Java
/*
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* Copyright (c) 2010
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*
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* Robert von Burg
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* eitch@eitchnet.ch
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*
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* All rights reserved.
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*
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*/
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package ch.eitchnet.privilege.policy;
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import ch.eitchnet.privilege.i18n.AccessDeniedException;
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import ch.eitchnet.privilege.i18n.PrivilegeException;
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import ch.eitchnet.privilege.model.Restrictable;
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import ch.eitchnet.privilege.model.internal.Privilege;
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import ch.eitchnet.privilege.model.internal.Role;
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/**
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* XXX re-think this implementation...
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*
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* @author rvonburg
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*/
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public class DefaultPrivilege implements PrivilegePolicy {
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/**
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* @see ch.eitchnet.privilege.policy.PrivilegePolicy#actionAllowed(ch.eitchnet.privilege.model.internal.Role,
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* ch.eitchnet.privilege.model.internal.Privilege, ch.eitchnet.privilege.model.Restrictable)
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*/
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@Override
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public void actionAllowed(Role role, Privilege privilege, Restrictable restrictable) {
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// validate user is not null
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if (role == null)
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throw new PrivilegeException("Role may not be null!");
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// get the PrivilegeName
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String privilegeName = restrictable.getPrivilegeName();
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if (privilegeName == null || privilegeName.isEmpty()) {
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throw new PrivilegeException("The PrivilegeName for the Restrictable is null or empty: " + restrictable);
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}
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// get the value on which the action is to be performed
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Object object = restrictable.getPrivilegeValue();
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// DefaultPrivilege policy expects the privilege value to be a string
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if (!(object instanceof String)) {
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throw new PrivilegeException(Restrictable.class.getName() + " " + restrictable.getClass().getSimpleName()
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+ " has returned a non-string privilege value!");
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}
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String privilegeValue = (String) object;
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// first check values not allowed
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for (String denied : privilege.getDenyList()) {
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// if value in deny list
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if (denied.equals(privilegeValue)) {
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// then throw access denied
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throw new AccessDeniedException("Role " + role.getName() + " does not have Privilege " + privilegeName
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+ " needed for Restrictable " + restrictable.getClass().getName());
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}
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}
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// now check values allowed
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for (String allowed : privilege.getAllowList()) {
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if (allowed.equals(privilegeValue))
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return;
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}
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// default is not allowed
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throw new AccessDeniedException("Role " + role.getName() + " does not have Privilege " + privilegeName
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+ " needed for Restrictable " + restrictable.getClass().getName());
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}
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}
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