javax.servlet
类 HttpConstraintElement

java.lang.Object
  javax.servlet.HttpConstraintElement

直接已知子类：

HttpMethodConstraintElement, ServletSecurityElement

public class HttpConstraintElement
extends Object

Java Class representation of an HttpConstraint annotation value.

从以下版本开始：

Servlet 3.0

构造方法摘要

HttpConstraintElement()
Constructs a default HTTP constraint element

HttpConstraintElement(ServletSecurity.EmptyRoleSemantic semantic)
Convenience constructor to establish EmptyRoleSemantic.DENY

HttpConstraintElement(ServletSecurity.EmptyRoleSemantic semantic, ServletSecurity.TransportGuarantee guarantee, String... roleNames)
Constructor to establish all of getEmptyRoleSemantic, getRolesAllowed, and getTransportGuarantee.

HttpConstraintElement(ServletSecurity.TransportGuarantee guarantee, String... roleNames)
Constructor to establish non-empty getRolesAllowed and/or TransportGuarantee.CONFIDENTIAL.

方法摘要

ServletSecurity.EmptyRoleSemantic	getEmptyRoleSemantic() Gets the default authorization semantic.
String[]	getRolesAllowed() Gets the names of the authorized roles.
ServletSecurity.TransportGuarantee	getTransportGuarantee() Gets the data protection requirement (i.e., whether or not SSL/TLS is required) that must be satisfied by the transport connection.

从类 java.lang.Object 继承的方法

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

构造方法详细信息

HttpConstraintElement

public HttpConstraintElement()

Constructs a default HTTP constraint element

HttpConstraintElement

public HttpConstraintElement(ServletSecurity.EmptyRoleSemantic semantic)

Convenience constructor to establish EmptyRoleSemantic.DENY

参数：

semantic - should be EmptyRoleSemantic.DENY

HttpConstraintElement

public HttpConstraintElement(ServletSecurity.TransportGuarantee guarantee,
                             String... roleNames)

Constructor to establish non-empty getRolesAllowed and/or TransportGuarantee.CONFIDENTIAL.

参数：

guarantee - TransportGuarantee.NONE or TransportGuarantee.CONFIDENTIAL

roleNames - the names of the roles that are to be allowed access

HttpConstraintElement

public HttpConstraintElement(ServletSecurity.EmptyRoleSemantic semantic,
                             ServletSecurity.TransportGuarantee guarantee,
                             String... roleNames)

Constructor to establish all of getEmptyRoleSemantic, getRolesAllowed, and getTransportGuarantee.

参数：

semantic - EmptyRoleSemantic.DENY or EmptyRoleSemantic.PERMIT

guarantee - TransportGuarantee.NONE or TransportGuarantee.CONFIDENTIAL

roleNames - the names of the roles that are to be allowed access, or missing if the semantic is EmptyRoleSemantic.DENY

方法详细信息

getEmptyRoleSemantic

public ServletSecurity.EmptyRoleSemantic getEmptyRoleSemantic()

Gets the default authorization semantic.

This value is insignificant when getRolesAllowed returns a non-empty array, and should not be specified when a non-empty array is specified for getRolesAllowed.

返回：

the ServletSecurity.EmptyRoleSemantic to be applied when getRolesAllowed returns an empty (that is, zero-length) array

getTransportGuarantee

public ServletSecurity.TransportGuarantee getTransportGuarantee()

Gets the data protection requirement (i.e., whether or not SSL/TLS is required) that must be satisfied by the transport connection.

返回：

the ServletSecurity.TransportGuarantee indicating the data protection that must be provided by the connection

getRolesAllowed

public String[] getRolesAllowed()

Gets the names of the authorized roles.

Duplicate role names appearing in getRolesAllowed are insignificant and may be discarded. The String "*" has no special meaning as a role name (should it occur in getRolesAllowed).

返回：

a (possibly empty) array of role names. When the array is empty, its meaning depends on the value of getEmptyRoleSemantic(). If its value is DENY, and getRolesAllowed returns an empty array, access is to be denied independent of authentication state and identity. Conversely, if its value is PERMIT, it indicates that access is to be allowed independent of authentication state and identity. When the array contains the names of one or more roles, it indicates that access is contingent on membership in at least one of the named roles (independent of the value of getEmptyRoleSemantic()).