/**
* Copyright (C) 2010-2017 Structr GmbH
*
* This file is part of Structr <http://structr.org>.
*
* Structr is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as
* published by the Free Software Foundation, either version 3 of the
* License, or (at your option) any later version.
*
* Structr 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 General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with Structr. If not, see <http://www.gnu.org/licenses/>.
*/
package org.structr.common;
import java.util.Arrays;
import java.util.HashSet;
import java.util.Set;
import org.structr.core.property.PropertyKey;
/**
*
*
*/
public class PermissionResolutionMask {
private static final Set<String> systemProperties = new HashSet<>(Arrays.asList(new String[] { "id", "type", }));
private final Set<String> removedProperties = new HashSet<>();
private final int READ = 0x00000001;
private final int WRITE = 0x00000002;
private final int DELETE = 0x00000004;
private final int ACCESS_CONTROL = 0x00000008;
private int checked = 0; // bitmask, encodes the permissions for which this mask was checked
private int value = 0; // bitmask, encodes the permissions of this mask
public PermissionResolutionMask() {}
public PermissionResolutionMask(final PermissionResolutionMask toCopy) {
removedProperties.addAll(toCopy.removedProperties);
this.value = toCopy.value;
this.checked = toCopy.checked;
}
@Override
public String toString() {
return "mask: " + Integer.toBinaryString(value) + ", checked: " + Integer.toBinaryString(checked);
}
public boolean alreadyChecked(final Permission permission) {
if (Permission.read.equals(permission)) {
return (checked & READ) != 0;
}
if (Permission.write.equals(permission)) {
return (checked & WRITE) != 0;
}
if (Permission.delete.equals(permission)) {
return (checked & DELETE) != 0;
}
if (Permission.accessControl.equals(permission)) {
return (checked & ACCESS_CONTROL) != 0;
}
return false;
}
public boolean setChecked(final Permission permission) {
if (Permission.read.equals(permission)) {
checked |= READ;
}
if (Permission.write.equals(permission)) {
checked |= WRITE;
}
if (Permission.delete.equals(permission)) {
checked |= DELETE;
}
if (Permission.accessControl.equals(permission)) {
checked |= ACCESS_CONTROL;
}
return false;
}
public boolean setPermission(final Permission permission, final boolean isAllowed) {
if (Permission.read.equals(permission)) {
if (isAllowed) {
value |= READ;
} else {
value &= ~READ;
}
}
if (Permission.write.equals(permission)) {
if (isAllowed) {
value |= WRITE;
} else {
value &= ~WRITE;
}
}
if (Permission.delete.equals(permission)) {
if (isAllowed) {
value |= DELETE;
} else {
value &= ~DELETE;
}
}
if (Permission.accessControl.equals(permission)) {
if (isAllowed) {
value |= ACCESS_CONTROL;
} else {
value &= ~ACCESS_CONTROL;
}
}
return false;
}
public boolean allowsPermission(final Permission permission) {
if (Permission.read.equals(permission)) {
return (value & READ) != 0;
}
if (Permission.write.equals(permission)) {
return (value & WRITE) != 0;
}
if (Permission.delete.equals(permission)) {
return (value & DELETE) != 0;
}
if (Permission.accessControl.equals(permission)) {
return (value & ACCESS_CONTROL) != 0;
}
return false;
}
public void clear() {
value = 0;
}
public boolean allowsProperty(final PropertyKey key) {
final String name = key.jsonName();
if (systemProperties.contains(name)) {
return true;
}
return !removedProperties.contains(name);
}
public Set<String> getRemovedProperties() {
return removedProperties;
}
public Set<String> propertyMask() {
return removedProperties;
}
public boolean isEmpty() {
return value == 0;
}
public void addRead() {
value |= READ;
}
public void removeRead() {
value &= ~READ;
}
public void addWrite() {
value |= WRITE;
}
public void removeWrite() {
value &= ~WRITE;
}
public void addDelete() {
value |= DELETE;
}
public void removeDelete() {
value &= ~DELETE;
}
public void addAccessControl() {
value |= ACCESS_CONTROL;
}
public void removeAccessControl() {
value &= ~ACCESS_CONTROL;
}
public void handleProperties(final String delta) {
if (delta != null) {
for (final String prop : delta.split("[, ]+")) {
this.removedProperties.add(prop.substring(1).trim());
}
}
}
public PermissionResolutionMask copy() {
return new PermissionResolutionMask(this);
}
public void restore(final PermissionResolutionMask mask) {
removedProperties.clear();
removedProperties.addAll(mask.removedProperties);
this.value = mask.value;
}
}