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package javax.servlet;
import java.util.*;
import javax.servlet.annotation.
HttpMethodConstraint;
import javax.servlet.annotation.
ServletSecurity;
/**
* Java Class representation of a {@link ServletSecurity} annotation value.
*
* @since Servlet 3.0
*/
public class
ServletSecurityElement extends
HttpConstraintElement {
private
Collection<
String>
methodNames;
private
Collection<
HttpMethodConstraintElement>
methodConstraints;
/**
* Constructs an instance using the default
* <code>HttpConstraintElement</code> value as the default Constraint
* element and with no HTTP Method specific constraint elements.
*/
public
ServletSecurityElement() {
methodConstraints = new
HashSet<
HttpMethodConstraintElement>();
methodNames =
Collections.
emptySet();
}
/**
* Constructs an instance with a default Constraint element
* and with no HTTP Method specific constraint elements.
*
* @param constraint the HttpConstraintElement to be
* applied to all HTTP methods other than those represented in the
* <tt>methodConstraints</tt>
*/
public
ServletSecurityElement(
HttpConstraintElement constraint) {
super(
constraint.
getEmptyRoleSemantic(),
constraint.
getTransportGuarantee(),
constraint.
getRolesAllowed());
methodConstraints = new
HashSet<
HttpMethodConstraintElement>();
methodNames =
Collections.
emptySet();
}
/**
* Constructs an instance using the default
* <code>HttpConstraintElement</code> value as the default Constraint
* element and with a collection of HTTP Method specific constraint
* elements.
*
* @param methodConstraints the collection of HTTP method specific
* constraint elements
*
* @throws IllegalArgumentException if duplicate method names are
* detected
*/
public
ServletSecurityElement(
Collection<
HttpMethodConstraintElement>
methodConstraints) {
this.
methodConstraints = (
methodConstraints == null ?
new
HashSet<
HttpMethodConstraintElement>() :
methodConstraints);
methodNames =
checkMethodNames(this.
methodConstraints);
}
/**
* Constructs an instance with a default Constraint element
* and with a collection of HTTP Method specific constraint elements.
*
* @param constraint the HttpConstraintElement to be
* applied to all HTTP methods other than those represented in the
* <tt>methodConstraints</tt>
* @param methodConstraints the collection of HTTP method specific
* constraint elements.
*
* @throws IllegalArgumentException if duplicate method names are
* detected
*/
public
ServletSecurityElement(
HttpConstraintElement constraint,
Collection<
HttpMethodConstraintElement>
methodConstraints) {
super(
constraint.
getEmptyRoleSemantic(),
constraint.
getTransportGuarantee(),
constraint.
getRolesAllowed());
this.
methodConstraints = (
methodConstraints == null ?
new
HashSet<
HttpMethodConstraintElement>() :
methodConstraints);
methodNames =
checkMethodNames(this.
methodConstraints);
}
/**
* Constructs an instance from a {@link ServletSecurity} annotation value.
*
* @param annotation the annotation value
*
* @throws IllegalArgumentException if duplicate method names are
* detected
*/
public
ServletSecurityElement(
ServletSecurity annotation) {
super(
annotation.
value().
value(),
annotation.
value().
transportGuarantee(),
annotation.
value().
rolesAllowed());
this.
methodConstraints = new
HashSet<
HttpMethodConstraintElement>();
for (
HttpMethodConstraint constraint :
annotation.
httpMethodConstraints()) {
this.
methodConstraints.
add(
new
HttpMethodConstraintElement(
constraint.
value(),
new
HttpConstraintElement(
constraint.
emptyRoleSemantic(),
constraint.
transportGuarantee(),
constraint.
rolesAllowed())));
}
methodNames =
checkMethodNames(this.
methodConstraints);
}
/**
* Gets the (possibly empty) collection of HTTP Method specific
* constraint elements.
*
* <p>If permitted, any changes to the returned <code>Collection</code> must not
* affect this <code>ServletSecurityElement</code>.
*
*
* @return the (possibly empty) collection of HttpMethodConstraintElement
* objects
*/
public
Collection<
HttpMethodConstraintElement>
getHttpMethodConstraints() {
return
Collections.
unmodifiableCollection(
methodConstraints);
}
/**
* Gets the set of HTTP method names named by the HttpMethodConstraints.
*
* <p>If permitted, any changes to the returned <code>Collection</code> must not
* affect this <code>ServletSecurityElement</code>.
*
*
* @return the collection String method names
*/
public
Collection<
String>
getMethodNames() {
return
Collections.
unmodifiableCollection(
methodNames);
}
/**
* Checks for duplicate method names in methodConstraints.
*
* @param methodConstraints
*
* @retrun Set of method names
*
* @throws IllegalArgumentException if duplicate method names are
* detected
*/
private
Collection<
String>
checkMethodNames(
Collection<
HttpMethodConstraintElement>
methodConstraints) {
Collection<
String>
methodNames = new
HashSet<
String>();
for (
HttpMethodConstraintElement methodConstraint :
methodConstraints) {
String methodName =
methodConstraint.
getMethodName();
if (!
methodNames.
add(
methodName)) {
throw new
IllegalArgumentException(
"Duplicate HTTP method name: " +
methodName);
}
}
return
methodNames;
}
}