/*
* 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.plugins.mongomk;
import java.util.Collections;
import java.util.List;
import javax.annotation.Nonnull;
import javax.jcr.PropertyType;
import org.apache.jackrabbit.mk.json.JsopReader;
import org.apache.jackrabbit.mk.json.JsopTokenizer;
import org.apache.jackrabbit.oak.api.PropertyState;
import org.apache.jackrabbit.oak.api.Type;
import org.apache.jackrabbit.oak.commons.PathUtils;
import org.apache.jackrabbit.oak.kernel.StringCache;
import org.apache.jackrabbit.oak.kernel.TypeCodes;
import org.apache.jackrabbit.oak.plugins.memory.BinaryPropertyState;
import org.apache.jackrabbit.oak.plugins.memory.BooleanPropertyState;
import org.apache.jackrabbit.oak.plugins.memory.DoublePropertyState;
import org.apache.jackrabbit.oak.plugins.memory.EmptyNodeState;
import org.apache.jackrabbit.oak.plugins.memory.LongPropertyState;
import org.apache.jackrabbit.oak.plugins.memory.MemoryNodeBuilder;
import org.apache.jackrabbit.oak.plugins.memory.ModifiedNodeState;
import org.apache.jackrabbit.oak.plugins.memory.PropertyStates;
import org.apache.jackrabbit.oak.plugins.memory.StringPropertyState;
import org.apache.jackrabbit.oak.plugins.value.Conversions;
import org.apache.jackrabbit.oak.spi.state.AbstractChildNodeEntry;
import org.apache.jackrabbit.oak.spi.state.AbstractNodeState;
import org.apache.jackrabbit.oak.spi.state.ChildNodeEntry;
import org.apache.jackrabbit.oak.spi.state.NodeBuilder;
import org.apache.jackrabbit.oak.spi.state.NodeState;
import org.apache.jackrabbit.oak.spi.state.NodeStateDiff;
import com.google.common.base.Function;
import com.google.common.collect.Iterables;
import com.google.common.collect.Lists;
import static com.google.common.base.Preconditions.checkNotNull;
import static java.util.Collections.emptyList;
import static org.apache.jackrabbit.oak.plugins.memory.EmptyNodeState.EMPTY_NODE;
import static org.apache.jackrabbit.oak.plugins.memory.PropertyStates.createProperty;
/**
* A {@link NodeState} implementation for the {@link MongoNodeStore}.
* TODO: merge MongoNodeState with Node
*/
final class MongoNodeState extends AbstractNodeState {
private final MongoNodeStore store;
private final Node node;
/**
* TODO: OAK-1056
*/
private boolean isBranch;
MongoNodeState(@Nonnull MongoNodeStore store,
@Nonnull Node node) {
this.store = checkNotNull(store);
this.node = checkNotNull(node);
}
String getPath() {
return node.getPath();
}
Revision getRevision() {
return node.getReadRevision();
}
MongoNodeState setBranch() {
isBranch = true;
return this;
}
boolean isBranch() {
return isBranch;
}
//--------------------------< NodeState >-----------------------------------
@Override
public boolean equals(Object that) {
if (this == that) {
return true;
} else if (that instanceof MongoNodeState) {
MongoNodeState other = (MongoNodeState) that;
if (getPath().equals(other.getPath())) {
return node.getLastRevision().equals(other.node.getLastRevision());
}
} else if (that instanceof ModifiedNodeState) {
ModifiedNodeState modified = (ModifiedNodeState) that;
if (modified.getBaseState() == this) {
return false;
}
}
if (that instanceof NodeState) {
return AbstractNodeState.equals(this, (NodeState) that);
} else {
return false;
}
}
@Override
public boolean exists() {
return true;
}
@Override
public PropertyState getProperty(String name) {
String value = node.getProperty(name);
if (value == null) {
return null;
}
JsopReader reader = new JsopTokenizer(value);
if (reader.matches('[')) {
return readArrayProperty(name, reader);
} else {
return readProperty(name, reader);
}
}
@Override
public boolean hasProperty(String name) {
return node.getPropertyNames().contains(name);
}
@Nonnull
@Override
public Iterable<? extends PropertyState> getProperties() {
return Iterables.transform(node.getPropertyNames(), new Function<String, PropertyState>() {
@Override
public PropertyState apply(String name) {
return getProperty(name);
}
});
}
@Nonnull
@Override
public NodeState getChildNode(@Nonnull String name) {
if (node.hasNoChildren()) {
return EmptyNodeState.MISSING_NODE;
}
String p = PathUtils.concat(getPath(), name);
Node child = store.getNode(p, node.getLastRevision());
if (child == null) {
return EmptyNodeState.MISSING_NODE;
} else {
return new MongoNodeState(store, child);
}
}
@Nonnull
@Override
public Iterable<? extends ChildNodeEntry> getChildNodeEntries() {
if (node.hasNoChildren()) {
return Collections.emptyList();
}
// TODO: handle many child nodes better
Node.Children children = store.getChildren(getPath(),
node.getLastRevision(), 100);
if (children.hasMore) {
children = store.getChildren(getPath(),
node.getLastRevision(), Integer.MAX_VALUE);
}
return Iterables.transform(children.children, new Function<String, ChildNodeEntry>() {
@Override
public ChildNodeEntry apply(String path) {
final String name = PathUtils.getName(path);
return new AbstractChildNodeEntry() {
@Nonnull
@Override
public String getName() {
return name;
}
@Nonnull
@Override
public NodeState getNodeState() {
return getChildNode(name);
}
};
}
});
}
@Nonnull
@Override
public NodeBuilder builder() {
if (isBranch) {
return new MemoryNodeBuilder(this);
} else if ("/".equals(getPath())) {
return new MongoRootBuilder(this, store);
} else {
return new MemoryNodeBuilder(this);
}
}
@Override
public boolean compareAgainstBaseState(NodeState base, NodeStateDiff diff) {
if (this == base) {
return true;
} else if (base == EMPTY_NODE || !base.exists()) {
// special case
return EmptyNodeState.compareAgainstEmptyState(this, diff);
} else if (base instanceof MongoNodeState) {
MongoNodeState mBase = (MongoNodeState) base;
if (store == mBase.store) {
if (node.getLastRevision().equals(mBase.node.getLastRevision())
&& getPath().equals(mBase.getPath())) {
// no differences
return true;
}
// TODO: use diff, similar to KernelNodeState
}
}
// fall back to the generic node state diff algorithm
return super.compareAgainstBaseState(base, diff);
}
//------------------------------< internal >--------------------------------
/**
* FIXME: copied from KernelNodeState.
*
* Read a {@code PropertyState} from a {@link JsopReader}
* @param name The name of the property state
* @param reader The reader
* @return new property state
*/
PropertyState readProperty(String name, JsopReader reader) {
return readProperty(name, store, reader);
}
/**
* FIXME: copied from KernelNodeState.
*
* Read a {@code PropertyState} from a {@link JsopReader}.
*
* @param name the name of the property state
* @param store the store
* @param reader the reader
* @return new property state
*/
public static PropertyState readProperty(String name, MongoNodeStore store, JsopReader reader) {
if (reader.matches(JsopReader.NUMBER)) {
String number = reader.getToken();
try {
return new LongPropertyState(name, Long.parseLong(number));
} catch (NumberFormatException e) {
return new DoublePropertyState(name, Double.parseDouble(number));
}
} else if (reader.matches(JsopReader.TRUE)) {
return BooleanPropertyState.booleanProperty(name, true);
} else if (reader.matches(JsopReader.FALSE)) {
return BooleanPropertyState.booleanProperty(name, false);
} else if (reader.matches(JsopReader.STRING)) {
String jsonString = reader.getToken();
if (jsonString.startsWith(TypeCodes.EMPTY_ARRAY)) {
int type = PropertyType.valueFromName(jsonString.substring(TypeCodes.EMPTY_ARRAY.length()));
return PropertyStates.createProperty(name, emptyList(), Type.fromTag(type, true));
}
int split = TypeCodes.split(jsonString);
if (split != -1) {
int type = TypeCodes.decodeType(split, jsonString);
String value = TypeCodes.decodeName(split, jsonString);
if (type == PropertyType.BINARY) {
return BinaryPropertyState.binaryProperty(name, store.getBlob(value));
} else {
return createProperty(name, StringCache.get(value), type);
}
} else {
return StringPropertyState.stringProperty(name, StringCache.get(jsonString));
}
} else {
throw new IllegalArgumentException("Unexpected token: " + reader.getToken());
}
}
/**
* FIXME: copied from KernelNodeState.
*
* Read a multi valued {@code PropertyState} from a {@link JsopReader}.
*
* @param name the name of the property state
* @param reader the reader
* @return new property state
*/
PropertyState readArrayProperty(String name, JsopReader reader) {
return readArrayProperty(name, store, reader);
}
/**
* FIXME: copied from KernelNodeState.
*
* Read a multi valued {@code PropertyState} from a {@link JsopReader}.
*
* @param name the name of the property state
* @param store the store
* @param reader the reader
* @return new property state
*/
public static PropertyState readArrayProperty(String name, MongoNodeStore store, JsopReader reader) {
int type = PropertyType.STRING;
List<Object> values = Lists.newArrayList();
while (!reader.matches(']')) {
if (reader.matches(JsopReader.NUMBER)) {
String number = reader.getToken();
try {
type = PropertyType.LONG;
values.add(Long.parseLong(number));
} catch (NumberFormatException e) {
type = PropertyType.DOUBLE;
values.add(Double.parseDouble(number));
}
} else if (reader.matches(JsopReader.TRUE)) {
type = PropertyType.BOOLEAN;
values.add(true);
} else if (reader.matches(JsopReader.FALSE)) {
type = PropertyType.BOOLEAN;
values.add(false);
} else if (reader.matches(JsopReader.STRING)) {
String jsonString = reader.getToken();
int split = TypeCodes.split(jsonString);
if (split != -1) {
type = TypeCodes.decodeType(split, jsonString);
String value = TypeCodes.decodeName(split, jsonString);
if (type == PropertyType.BINARY) {
values.add(store.getBlob(value));
} else if (type == PropertyType.DOUBLE) {
values.add(Conversions.convert(value).toDouble());
} else if (type == PropertyType.DECIMAL) {
values.add(Conversions.convert(value).toDecimal());
} else {
values.add(StringCache.get(value));
}
} else {
type = PropertyType.STRING;
values.add(StringCache.get(jsonString));
}
} else {
throw new IllegalArgumentException("Unexpected token: " + reader.getToken());
}
reader.matches(',');
}
return createProperty(name, values, Type.fromTag(type, true));
}
}