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/*
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright ownership.
* The ASF licenses this file to You under the Apache License, Version 2.0
* (the "License"); you may not use this file except in compliance with
* the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package org.apache.jackrabbit.oak.spi.security.authorization.restriction;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.Collection;
import java.util.Collections;
import java.util.HashMap;
import java.util.HashSet;
import java.util.List;
import java.util.Map;
import java.util.Set;
import javax.annotation.Nonnull;
import javax.annotation.Nullable;
import javax.jcr.RepositoryException;
import javax.jcr.Value;
import javax.jcr.security.AccessControlException;
import com.google.common.collect.ImmutableSet;
import com.google.common.collect.Sets;
import org.apache.jackrabbit.oak.api.Tree;
import org.apache.jackrabbit.oak.spi.security.authorization.accesscontrol.AccessControlConstants;
/**
* Aggregates of a collection of {@link RestrictionProvider} implementations
* into a single provider.
*/
public final class CompositeRestrictionProvider implements RestrictionProvider {
private final Collection providers;
private CompositeRestrictionProvider(@Nonnull Collection providers) {
this.providers = ImmutableSet.copyOf(providers);
}
public static RestrictionProvider newInstance(@Nonnull RestrictionProvider... providers) {
return newInstance(Arrays.asList(providers));
}
public static RestrictionProvider newInstance(@Nonnull Collection providers) {
switch (providers.size()) {
case 0: return EMPTY;
case 1: return providers.iterator().next();
default: return new CompositeRestrictionProvider(providers);
}
}
@Nonnull
@Override
public Set getSupportedRestrictions(@Nullable String oakPath) {
Set defs = Sets.newHashSet();
for (RestrictionProvider rp : providers) {
defs.addAll(rp.getSupportedRestrictions(oakPath));
}
return defs;
}
@Nonnull
@Override
public Restriction createRestriction(@Nullable String oakPath, @Nonnull String oakName, @Nonnull Value value) throws RepositoryException {
return getProvider(oakPath, oakName).createRestriction(oakPath, oakName, value);
}
@Nonnull
@Override
public Restriction createRestriction(@Nullable String oakPath, @Nonnull String oakName, @Nonnull Value... values) throws RepositoryException {
return getProvider(oakPath, oakName).createRestriction(oakPath, oakName, values);
}
@Nonnull
@Override
public Set readRestrictions(@Nullable String oakPath, @Nonnull Tree aceTree) {
Set restrictions = Sets.newHashSet();
for (RestrictionProvider rp : providers) {
restrictions.addAll(rp.readRestrictions(oakPath, aceTree));
}
return restrictions;
}
@Override
public void writeRestrictions(String oakPath, Tree aceTree, Set restrictions) throws RepositoryException {
for (Restriction r : restrictions) {
RestrictionProvider rp = getProvider(oakPath, getName(r));
rp.writeRestrictions(oakPath, aceTree, Collections.singleton(r));
}
}
@Override
public void validateRestrictions(@Nullable String oakPath, @Nonnull Tree aceTree) throws RepositoryException {
Map supported = getSupported(oakPath);
Set rNames = new HashSet();
for (Restriction r : readRestrictions(oakPath, aceTree)) {
String name = getName(r);
rNames.add(name);
if (!supported.containsKey(name)) {
throw new AccessControlException("Unsupported restriction: " + name + " at " + oakPath);
}
if (!r.getDefinition().equals(supported.get(name))) {
throw new AccessControlException("Invalid restriction: " + name + " at " + oakPath);
}
}
for (RestrictionDefinition def : supported.values()) {
String defName = def.getName();
if (hasRestrictionProperty(aceTree, defName) && !rNames.contains(defName)) {
throw new AccessControlException("Invalid restriction " + defName + " at " + oakPath);
}
if (def.isMandatory() && !rNames.contains(defName)) {
throw new AccessControlException("Mandatory restriction " + defName + " is missing.");
}
}
}
@Nonnull
@Override
public RestrictionPattern getPattern(@Nullable String oakPath, @Nonnull Tree tree) {
return getPattern(oakPath, readRestrictions(oakPath, tree));
}
@Nonnull
@Override
public RestrictionPattern getPattern(@Nullable String oakPath, @Nonnull Set restrictions) {
List patterns = new ArrayList();
for (RestrictionProvider rp : providers) {
RestrictionPattern pattern = rp.getPattern(oakPath, restrictions);
if (pattern != RestrictionPattern.EMPTY) {
patterns.add(pattern);
}
}
return CompositePattern.create(patterns);
}
//------------------------------------------------------------< private >---
private RestrictionProvider getProvider(@Nullable String oakPath, @Nonnull String oakName) throws AccessControlException {
for (RestrictionProvider rp : providers) {
for (RestrictionDefinition def : rp.getSupportedRestrictions(oakPath)) {
if (def.getName().equals(oakName)) {
return rp;
}
}
}
throw new AccessControlException("Unsupported restriction (path = " + oakPath + "; name = " + oakName + ')');
}
private Map getSupported(@Nullable String oakPath) {
Map supported = new HashMap();
for (RestrictionProvider rp : providers) {
for (RestrictionDefinition rd : rp.getSupportedRestrictions(oakPath)) {
supported.put(rd.getName(), rd);
}
}
return supported;
}
private static boolean hasRestrictionProperty(Tree aceTree, String name) {
if (aceTree.hasProperty(name)) {
return true;
}
Tree restrictionTree = aceTree.getChild(AccessControlConstants.REP_RESTRICTIONS);
return restrictionTree.exists() && restrictionTree.hasProperty(name);
}
private static String getName(Restriction restriction) {
return restriction.getDefinition().getName();
}
}
