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package javax.servlet;
import java.util.*;
import javax.servlet.annotation.HttpMethodConstraint;
import javax.servlet.annotation.ServletSecurity;
/**
* Java Class represntation 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 = new HashSet<String>();
}
/**
* 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 = new HashSet<String>();
}
/**
* 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.
*
* @return the (possibly empty) collection of HttpMethodConstraintElement
* objects
*/
public Collection<HttpMethodConstraintElement> getHttpMethodConstraints() {
return methodConstraints;
}
/**
* Gets the set of HTTP methid names named by the HttpMethodConstraints.
*
* @return the set of String method names
*/
public Collection<String> getMethodNames() {
return 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.contains(methodName)) {
throw new IllegalArgumentException(
"Duplicate HTTP method name: " + methodName);
}
methodNames.add(methodName);
}
return methodNames;
}
}