| /* |
| * 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.core; |
| |
| import java.io.IOException; |
| import java.io.InputStream; |
| import com.google.common.base.Predicate; |
| import org.apache.jackrabbit.oak.api.Blob; |
| import org.apache.jackrabbit.oak.api.PropertyState; |
| import org.apache.jackrabbit.oak.api.Tree; |
| import org.apache.jackrabbit.oak.api.Type; |
| import org.apache.jackrabbit.oak.commons.LazyValue; |
| import org.apache.jackrabbit.oak.plugins.tree.factories.TreeFactory; |
| import org.apache.jackrabbit.oak.spi.security.authorization.permission.PermissionProvider; |
| import org.apache.jackrabbit.oak.spi.security.authorization.permission.TreePermission; |
| import org.apache.jackrabbit.oak.spi.state.NodeBuilder; |
| import org.apache.jackrabbit.oak.spi.state.NodeState; |
| import org.apache.jackrabbit.oak.spi.state.NodeStateUtils; |
| import org.jetbrains.annotations.NotNull; |
| import org.jetbrains.annotations.Nullable; |
| |
| import static com.google.common.base.Preconditions.checkNotNull; |
| import static com.google.common.base.Preconditions.checkState; |
| import static com.google.common.collect.Iterables.filter; |
| import static com.google.common.collect.Iterables.size; |
| import static java.util.Collections.emptyList; |
| import static org.apache.jackrabbit.oak.api.Type.BOOLEAN; |
| import static org.apache.jackrabbit.oak.api.Type.NAME; |
| import static org.apache.jackrabbit.oak.api.Type.NAMES; |
| import static org.apache.jackrabbit.oak.api.Type.STRING; |
| |
| class SecureNodeBuilder implements NodeBuilder { |
| |
| /** |
| * Root builder, or {@code this} for the root builder itself. |
| */ |
| private final SecureNodeBuilder rootBuilder; |
| |
| /** |
| * Parent builder, or {@code null} for a root builder. |
| */ |
| private final SecureNodeBuilder parent; |
| |
| /** |
| * Name of this child node within the parent builder, |
| * or {@code null} for a root builder. |
| */ |
| private final String name; |
| |
| /** |
| * Permissions provider for evaluating access rights to the underlying raw builder |
| */ |
| private final LazyValue<PermissionProvider> permissionProvider; |
| |
| /** |
| * Underlying node builder. |
| */ |
| private final NodeBuilder builder; |
| |
| /** |
| * Security context of this subtree, updated whenever the base revision |
| * changes. |
| */ |
| private TreePermission treePermission = null; // initialized lazily |
| |
| /** |
| * Possibly outdated reference to the tree permission of the root |
| * builder. Used to detect when the base state (and thus the security |
| * context) of the root builder has changed, and trigger an update of |
| * the tree permission of this builder. |
| * |
| * @see #treePermission |
| */ |
| private TreePermission rootPermission = null; // initialized lazily |
| |
| /** |
| * Create the {@code SecureNodeBuilder} for the root node. |
| * |
| * @param builder The {@code NodeBuilder} of the root node. |
| * @param permissionProvider The {@code PermissionProvider} used to evaluation read access. |
| */ |
| SecureNodeBuilder( |
| @NotNull NodeBuilder builder, |
| @NotNull LazyValue<PermissionProvider> permissionProvider) { |
| this.rootBuilder = this; |
| this.parent = null; |
| this.name = null; |
| this.permissionProvider = checkNotNull(permissionProvider); |
| this.builder = checkNotNull(builder); |
| } |
| |
| private SecureNodeBuilder(SecureNodeBuilder parent, String name) { |
| this.rootBuilder = parent.rootBuilder; |
| this.parent = parent; |
| this.name = name; |
| this.permissionProvider = parent.permissionProvider; |
| this.builder = parent.builder.getChildNode(name); |
| } |
| |
| @Override @NotNull |
| public NodeState getBaseState() { |
| return new SecureNodeState(builder.getBaseState(), getTreePermission()); |
| } |
| |
| @Override @NotNull |
| public NodeState getNodeState() { |
| return new SecureNodeState(builder.getNodeState(), getTreePermission()); |
| } |
| |
| @Override |
| public boolean exists() { |
| return builder.exists() |
| && (builder.isReplaced() || getTreePermission().canRead()); |
| } |
| |
| @Override |
| public boolean isNew() { |
| return builder.isNew() |
| || (builder.isReplaced() && !getTreePermission().canRead()); |
| } |
| |
| @Override |
| public boolean isNew(String name) { |
| return builder.isNew(name) |
| || (builder.isReplaced(name) |
| && !getTreePermission().canRead(builder.getProperty(name))); |
| } |
| |
| @Override |
| public boolean isModified() { |
| return builder.isModified(); |
| } |
| |
| @Override |
| public boolean isReplaced() { |
| return builder.isReplaced() && !isNew(); |
| } |
| |
| @Override |
| public boolean isReplaced(String name) { |
| return builder.isReplaced(name) && !isNew(name); |
| } |
| |
| public void baseChanged() { |
| checkState(parent == null); |
| treePermission = null; // trigger re-evaluation |
| rootPermission = null; |
| } |
| |
| @Override |
| public boolean remove() { |
| return exists() && builder.remove(); |
| } |
| |
| |
| @Override |
| public boolean moveTo(@NotNull NodeBuilder newParent, @NotNull String newName) { |
| return exists() && builder.moveTo(newParent, newName); |
| } |
| |
| @Nullable |
| @Override |
| public PropertyState getProperty(String name) { |
| PropertyState property = builder.getProperty(name); |
| if (new ReadablePropertyPredicate().apply(property)) { |
| return property; |
| } else { |
| return null; |
| } |
| } |
| |
| @Override |
| public boolean hasProperty(String name) { |
| return getProperty(name) != null; |
| } |
| |
| @Override |
| public synchronized long getPropertyCount() { |
| if (getTreePermission().canReadProperties() || isNew()) { |
| return builder.getPropertyCount(); |
| } else { |
| return size(filter( |
| builder.getProperties(), |
| new ReadablePropertyPredicate())); |
| } |
| } |
| |
| @NotNull |
| @Override |
| public Iterable<? extends PropertyState> getProperties() { |
| if (getTreePermission().canReadProperties() || isNew()) { |
| return builder.getProperties(); |
| } else { |
| return filter( |
| builder.getProperties(), |
| new ReadablePropertyPredicate()); |
| } |
| } |
| |
| @Override |
| public boolean getBoolean(@NotNull String name) { |
| PropertyState property = getProperty(name); |
| return isType(property, BOOLEAN) && property.getValue(BOOLEAN); |
| } |
| |
| @Nullable |
| @Override |
| public String getString(@NotNull String name) { |
| PropertyState property = getProperty(name); |
| if (isType(property, STRING)) { |
| return property.getValue(STRING); |
| } else { |
| return null; |
| } |
| } |
| |
| @Nullable |
| @Override |
| public String getName(@NotNull String name) { |
| PropertyState property = getProperty(name); |
| if (isType(property, NAME)) { |
| return property.getValue(NAME); |
| } else { |
| return null; |
| } |
| } |
| |
| @NotNull |
| @Override |
| public Iterable<String> getNames(@NotNull String name) { |
| PropertyState property = getProperty(name); |
| if (isType(property, NAMES)) { |
| return property.getValue(NAMES); |
| } else { |
| return emptyList(); |
| } |
| } |
| |
| @NotNull |
| @Override |
| public NodeBuilder setProperty(@NotNull PropertyState property) { |
| builder.setProperty(property); |
| return this; |
| } |
| |
| @NotNull |
| @Override |
| public <T> NodeBuilder setProperty(String name, @NotNull T value) { |
| builder.setProperty(name, value); |
| return this; |
| } |
| |
| @NotNull |
| @Override |
| public <T> NodeBuilder setProperty( |
| String name, @NotNull T value, Type<T> type) { |
| builder.setProperty(name, value, type); |
| return this; |
| } |
| |
| @NotNull |
| @Override |
| public NodeBuilder removeProperty(String name) { |
| if (hasProperty(name)) { // only remove properties that we can see |
| builder.removeProperty(name); |
| } |
| return this; |
| } |
| |
| @NotNull |
| @Override |
| public Iterable<String> getChildNodeNames() { |
| return filter( |
| builder.getChildNodeNames(), |
| input -> input != null && getChildNode(input).exists()); |
| } |
| |
| @Override |
| public boolean hasChildNode(@NotNull String name) { |
| if (builder.hasChildNode(name)) { |
| return getChildNode(name).exists(); |
| } else { |
| return false; |
| } |
| } |
| |
| @NotNull |
| @Override |
| public NodeBuilder child(@NotNull String name) { |
| if (hasChildNode(name)) { |
| return getChildNode(name); |
| } else { |
| return setChildNode(name); |
| } |
| } |
| |
| @NotNull |
| @Override |
| public NodeBuilder setChildNode(@NotNull String name) { |
| builder.setChildNode(name); |
| return new SecureNodeBuilder(this, name); |
| } |
| |
| @NotNull |
| @Override |
| public NodeBuilder setChildNode(@NotNull String name, @NotNull NodeState nodeState) { |
| builder.setChildNode(name, nodeState); |
| return new SecureNodeBuilder(this, name); |
| } |
| |
| @NotNull |
| @Override |
| public NodeBuilder getChildNode(@NotNull String name) { |
| return new SecureNodeBuilder(this, name); |
| } |
| |
| @Override |
| public synchronized long getChildNodeCount(long max) { |
| if (getTreePermission().canReadAll()) { |
| return builder.getChildNodeCount(max); |
| } else { |
| return size(getChildNodeNames()); |
| } |
| } |
| |
| @Override |
| public Blob createBlob(InputStream stream) throws IOException { |
| return builder.createBlob(stream); |
| } |
| |
| /** |
| * Permissions of this tree. |
| * |
| * @return The permissions for this tree. |
| */ |
| @NotNull |
| private TreePermission getTreePermission() { |
| if (treePermission == null |
| || rootPermission != rootBuilder.treePermission) { |
| NodeState base = builder.getBaseState(); |
| if (parent == null) { |
| Tree baseTree = TreeFactory.createReadOnlyTree(base); |
| treePermission = permissionProvider.get().getTreePermission(baseTree, TreePermission.EMPTY); |
| rootPermission = treePermission; |
| } else { |
| treePermission = parent.getTreePermission().getChildPermission(name, base); |
| rootPermission = parent.rootPermission; |
| } |
| } |
| return treePermission; |
| } |
| |
| private static boolean isType(@Nullable PropertyState property, Type<?> type) { |
| Type<?> t = (property == null) ? null : property.getType(); |
| return t == type; |
| } |
| |
| //------------------------------------------------------< inner classes >--- |
| |
| /** |
| * Predicate for testing whether a given property is readable. |
| */ |
| private class ReadablePropertyPredicate implements Predicate<PropertyState> { |
| @Override |
| public boolean apply(@Nullable PropertyState property) { |
| if (property != null) { |
| String propertyName = property.getName(); |
| return NodeStateUtils.isHidden(propertyName) || |
| getTreePermission().canRead(property) || |
| isNew(propertyName); |
| } else { |
| return false; |
| } |
| } |
| } |
| |
| } |