/*
* 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 javax.annotation.Nonnull;
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.query.ExecutionContext;
import org.apache.jackrabbit.oak.query.QueryEngineImpl;
import org.apache.jackrabbit.oak.spi.state.NodeState;
/**
* 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 {
private final ImmutableTree rootTree;
public ImmutableRoot(@Nonnull NodeState rootState) {
this(new ImmutableTree(rootState));
}
public ImmutableRoot(@Nonnull Root root, @Nonnull TreeTypeProvider typeProvider) {
this(ImmutableTree.createFromRoot(root, typeProvider));
}
public ImmutableRoot(@Nonnull ImmutableTree rootTree) {
checkArgument(rootTree.isRoot());
this.rootTree = rootTree;
}
//---------------------------------------------------------------< Root >---
@Nonnull
@Override
public ImmutableTree getTree(@Nonnull 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 boolean copy(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() {
commit(null, null);
}
@Override
public void commit(String message, String path) {
throw new UnsupportedOperationException();
}
@Override
public boolean hasPendingChanges() {
return false;
}
@Nonnull
@Override
public QueryEngine getQueryEngine() {
return new QueryEngineImpl() {
@Override
protected ExecutionContext getExecutionContext() {
return new ExecutionContext(rootTree.getNodeState(), rootTree, new PropertyIndexProvider());
}
};
}
@Override @Nonnull
public Blob createBlob(@Nonnull InputStream stream) {
throw new UnsupportedOperationException();
}
@Nonnull
@Override
public ContentSession getContentSession() {
throw new UnsupportedOperationException();
}
}