org.jboss.security.acl.ACLEntryImpl Maven / Gradle / Ivy
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/*
* JBoss, Home of Professional Open Source
* Copyright 2005, JBoss Inc., and individual contributors as indicated
* by the @authors tag. See the copyright.txt in the distribution for a
* full listing of individual contributors.
*
* This is free software; you can redistribute it and/or modify it
* under the terms of the GNU Lesser General Public License as
* published by the Free Software Foundation; either version 2.1 of
* the License, or (at your option) any later version.
*
* This software is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this software; if not, write to the Free
* Software Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
* 02110-1301 USA, or see the FSF site: http://www.fsf.org.
*/
package org.jboss.security.acl;
import java.io.Serializable;
import javax.persistence.Entity;
import javax.persistence.GeneratedValue;
import javax.persistence.Id;
import javax.persistence.ManyToOne;
import javax.persistence.PostLoad;
import javax.persistence.PrePersist;
import javax.persistence.Table;
import javax.persistence.Transient;
import org.jboss.security.PicketBoxMessages;
import org.jboss.security.identity.Identity;
/**
*
* This class represents an entry in the Access Control List (ACL), and associates a permission to an identity. This
* implementation only stores permissions of type {@code BitMaskPermission}, and can also only check permissions of
* that type.
*
*
* @author Stefan Guilhen
*/
@Entity
@Table(name = "ACL_ENTRY")
public class ACLEntryImpl implements ACLEntry, Serializable
{
private static final long serialVersionUID = -2985214023383451768L;
@Id
@GeneratedValue
private long entryID;
@Transient
private BitMaskPermission permission;
/* persist only the bitmask */
private int bitMask;
@Transient
private Identity identity;
/* persist the string representation of the identity or role */
private String identityOrRole;
@ManyToOne
private ACLImpl acl;
/**
*
* Builds an instance of {@code ACLEntryImpl}. This constructor is required by the JPA specification.
*
*/
ACLEntryImpl()
{
}
/**
*
* Builds an instance of {@code ACLEntryImpl} with the specified permission and identity.
*
*
* @param permission the {@code ACLPermission} granted to the associated identity.
* @param identity the {@code Identity} for which the permission is being granted.
*/
public ACLEntryImpl(BitMaskPermission permission, Identity identity)
{
this.permission = permission;
this.identity = identity;
this.identityOrRole = identity.getName();
}
/**
*
* Builds an instance of {@code ACLEntryImpl} with the specified permission and identity/role name.
*
*
* @param permission the {@code ACLPermission} granted to the associated identity.
* @param identityOrRole a {@code String} representing the identity or role name.
*/
public ACLEntryImpl(BitMaskPermission permission, String identityOrRole)
{
this.permission = permission;
this.identityOrRole = identityOrRole;
}
/**
*
* Obtains the persistent id of this {@code ACLEntryImpl}.
*
*
* @return a {@code long} representing the persistent id this entry.
*/
public long getACLEntryId()
{
return this.entryID;
}
/**
*
* Method called by the JPA layer before persisting the fields.
*
*/
@PrePersist
@SuppressWarnings("unused")
private void setPersistentFields()
{
if (this.permission != null)
this.bitMask = this.permission.getMaskValue();
}
/**
*
* Method called by the JPA layer after loading the persisted object.
*
*/
@PostLoad
@SuppressWarnings("unused")
private void loadState()
{
if (this.permission != null)
throw PicketBoxMessages.MESSAGES.aclEntryPermissionAlreadySet();
this.permission = new CompositeACLPermission(this.bitMask);
}
public ACLImpl getAcl()
{
return this.acl;
}
public void setAcl(ACLImpl acl)
{
this.acl = acl;
}
/*
* (non-Javadoc)
*
* @see org.jboss.security.acl.ACLEntry#getIdentityOrRole()
*/
public String getIdentityOrRole()
{
return this.identityOrRole;
}
/*
* (non-Javadoc)
*
* @see org.jboss.security.acl.ACLEntry#getIdentity()
*/
public Identity getIdentity()
{
return this.identity;
}
/*
* (non-Javadoc)
*
* @see org.jboss.security.acl.ACLEntry#getPermission()
*/
public ACLPermission getPermission()
{
return this.permission;
}
/*
* (non-Javadoc)
*
* @see org.jboss.security.acl.ACLEntry#checkPermission(org.jboss.security.acl.ACLPermission)
*/
public boolean checkPermission(ACLPermission permission)
{
if (!(permission instanceof BitMaskPermission))
return false;
BitMaskPermission bitmaskPermission = (BitMaskPermission) permission;
// an empty permission is always part of another permission.
if (bitmaskPermission.getMaskValue() == 0)
return true;
// simple implementation: if all bits match, return true.
return (this.permission.getMaskValue() & bitmaskPermission.getMaskValue()) == bitmaskPermission.getMaskValue();
}
/*
* (non-Javadoc)
*
* @see java.lang.Object#equals(java.lang.Object)
*/
@Override
public boolean equals(Object obj)
{
if (obj instanceof ACLEntryImpl)
{
ACLEntryImpl entry = (ACLEntryImpl) obj;
return this.identityOrRole.equals(entry.identityOrRole);
}
return false;
}
/*
* (non-Javadoc)
*
* @see java.lang.Object#hashCode()
*/
@Override
public int hashCode()
{
return this.identityOrRole.hashCode();
}
}