| /* |
| * 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 static com.google.common.base.Preconditions.checkArgument; |
| import static org.apache.jackrabbit.oak.commons.PathUtils.elements; |
| |
| import java.io.InputStream; |
| import java.util.Map; |
| |
| import org.apache.jackrabbit.oak.api.Blob; |
| import org.apache.jackrabbit.oak.api.ContentSession; |
| import org.apache.jackrabbit.oak.api.QueryEngine; |
| import org.apache.jackrabbit.oak.api.Root; |
| import org.apache.jackrabbit.oak.commons.PathUtils; |
| import org.apache.jackrabbit.oak.plugins.index.property.PropertyIndexProvider; |
| import org.apache.jackrabbit.oak.plugins.tree.ReadOnly; |
| import org.apache.jackrabbit.oak.plugins.tree.impl.ImmutableTree; |
| import org.apache.jackrabbit.oak.query.ExecutionContext; |
| import org.apache.jackrabbit.oak.query.QueryEngineImpl; |
| import org.apache.jackrabbit.oak.query.QueryEngineSettings; |
| import org.apache.jackrabbit.oak.spi.state.NodeState; |
| import org.jetbrains.annotations.NotNull; |
| |
| /** |
| * Simple implementation of the Root interface that only supports simple read |
| * operations based on the {@code NodeState} (or {@code ImmutableTree}) |
| * passed to the constructor. This root implementation provides a query engine |
| * with index support limited to the {@link PropertyIndexProvider}. |
| */ |
| public final class ImmutableRoot implements Root, ReadOnly { |
| |
| private final ImmutableTree rootTree; |
| |
| public ImmutableRoot(@NotNull NodeState rootState) { |
| this(new ImmutableTree(rootState)); |
| } |
| |
| public ImmutableRoot(@NotNull Root root) { |
| if (root instanceof MutableRoot) { |
| rootTree = new ImmutableTree(((MutableRoot) root).getBaseState()); |
| } else if (root instanceof ImmutableRoot) { |
| rootTree = ((ImmutableRoot) root).getTree("/"); |
| } else { |
| throw new IllegalArgumentException("Unsupported Root implementation: " + root.getClass()); |
| } |
| } |
| |
| public ImmutableRoot(@NotNull ImmutableTree rootTree) { |
| checkArgument(rootTree.isRoot()); |
| this.rootTree = rootTree; |
| } |
| |
| public static ImmutableRoot getInstance(@NotNull Root root) { |
| if (root instanceof ImmutableRoot) { |
| return (ImmutableRoot) root; |
| } else { |
| return new ImmutableRoot(root); |
| } |
| } |
| |
| //---------------------------------------------------------------< Root >--- |
| |
| @NotNull |
| @Override |
| public ImmutableTree getTree(@NotNull String path) { |
| checkArgument(PathUtils.isAbsolute(path)); |
| ImmutableTree child = rootTree; |
| for (String name : elements(path)) { |
| child = child.getChild(name); |
| } |
| return child; |
| } |
| |
| @Override |
| public boolean move(String sourcePath, String destPath) { |
| throw new UnsupportedOperationException(); |
| } |
| |
| @Override |
| public void rebase() { |
| throw new UnsupportedOperationException(); |
| } |
| |
| @Override |
| public void refresh() { |
| throw new UnsupportedOperationException(); |
| } |
| |
| @Override |
| public void commit(@NotNull Map<String, Object> info) { |
| throw new UnsupportedOperationException(); |
| } |
| |
| @Override |
| public void commit() { |
| throw new UnsupportedOperationException(); |
| } |
| |
| @Override |
| public boolean hasPendingChanges() { |
| return false; |
| } |
| |
| @NotNull |
| @Override |
| public QueryEngine getQueryEngine() { |
| return new QueryEngineImpl() { |
| @Override |
| protected ExecutionContext getExecutionContext() { |
| return new ExecutionContext( |
| rootTree.getNodeState(), ImmutableRoot.this, |
| new QueryEngineSettings(), |
| new PropertyIndexProvider(), null); |
| } |
| }; |
| } |
| |
| @Override @NotNull |
| public Blob createBlob(@NotNull InputStream stream) { |
| throw new UnsupportedOperationException(); |
| } |
| |
| @Override |
| public Blob getBlob(@NotNull String reference) { |
| return null; |
| } |
| |
| @NotNull |
| @Override |
| public ContentSession getContentSession() { |
| throw new UnsupportedOperationException(); |
| } |
| |
| } |