PolicySpi.java revision 2362
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0N/A
0N/A
0N/Apackage java.security;
0N/A
0N/A/**
0N/A * This class defines the <i>Service Provider Interface</i> (<b>SPI</b>)
0N/A * for the <code>Policy</code> class.
0N/A * All the abstract methods in this class must be implemented by each
0N/A * service provider who wishes to supply a Policy implementation.
0N/A *
0N/A * <p> Subclass implementations of this abstract class must provide
0N/A * a public constructor that takes a <code>Policy.Parameters</code>
0N/A * object as an input parameter. This constructor also must throw
0N/A * an IllegalArgumentException if it does not understand the
0N/A * <code>Policy.Parameters</code> input.
0N/A *
0N/A *
0N/A * @since 1.6
0N/A */
0N/A
0N/Apublic abstract class PolicySpi {
0N/A
0N/A /**
0N/A * Check whether the policy has granted a Permission to a ProtectionDomain.
0N/A *
0N/A * @param domain the ProtectionDomain to check.
0N/A *
0N/A * @param permission check whether this permission is granted to the
0N/A * specified domain.
0N/A *
0N/A * @return boolean true if the permission is granted to the domain.
0N/A */
0N/A protected abstract boolean engineImplies
0N/A (ProtectionDomain domain, Permission permission);
0N/A
0N/A /**
0N/A * Refreshes/reloads the policy configuration. The behavior of this method
0N/A * depends on the implementation. For example, calling <code>refresh</code>
0N/A * on a file-based policy will cause the file to be re-read.
0N/A *
0N/A * <p> The default implementation of this method does nothing.
0N/A * This method should be overridden if a refresh operation is supported
0N/A * by the policy implementation.
0N/A */
0N/A protected void engineRefresh() { }
0N/A
0N/A /**
0N/A * Return a PermissionCollection object containing the set of
0N/A * permissions granted to the specified CodeSource.
0N/A *
0N/A * <p> The default implementation of this method returns
0N/A * Policy.UNSUPPORTED_EMPTY_COLLECTION object. This method can be
0N/A * overridden if the policy implementation can return a set of
0N/A * permissions granted to a CodeSource.
0N/A *
0N/A * @param codesource the CodeSource to which the returned
0N/A * PermissionCollection has been granted.
0N/A *
0N/A * @return a set of permissions granted to the specified CodeSource.
0N/A * If this operation is supported, the returned
0N/A * set of permissions must be a new mutable instance
0N/A * and it must support heterogeneous Permission types.
0N/A * If this operation is not supported,
0N/A * Policy.UNSUPPORTED_EMPTY_COLLECTION is returned.
0N/A */
0N/A protected PermissionCollection engineGetPermissions
0N/A (CodeSource codesource) {
0N/A return Policy.UNSUPPORTED_EMPTY_COLLECTION;
0N/A }
0N/A
0N/A /**
0N/A * Return a PermissionCollection object containing the set of
0N/A * permissions granted to the specified ProtectionDomain.
0N/A *
0N/A * <p> The default implementation of this method returns
0N/A * Policy.UNSUPPORTED_EMPTY_COLLECTION object. This method can be
0N/A * overridden if the policy implementation can return a set of
0N/A * permissions granted to a ProtectionDomain.
0N/A *
0N/A * @param domain the ProtectionDomain to which the returned
0N/A * PermissionCollection has been granted.
0N/A *
0N/A * @return a set of permissions granted to the specified ProtectionDomain.
0N/A * If this operation is supported, the returned
0N/A * set of permissions must be a new mutable instance
0N/A * and it must support heterogeneous Permission types.
0N/A * If this operation is not supported,
0N/A * Policy.UNSUPPORTED_EMPTY_COLLECTION is returned.
0N/A */
0N/A protected PermissionCollection engineGetPermissions
0N/A (ProtectionDomain domain) {
0N/A return Policy.UNSUPPORTED_EMPTY_COLLECTION;
0N/A }
0N/A}