/*
* 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.unique;
import java.io.UnsupportedEncodingException;
import java.net.URLEncoder;
import java.util.Map;
import org.apache.jackrabbit.oak.api.CommitFailedException;
import org.apache.jackrabbit.oak.api.CoreValue;
import org.apache.jackrabbit.oak.api.PropertyState;
import org.apache.jackrabbit.oak.plugins.memory.StringValue;
import org.apache.jackrabbit.oak.spi.commit.Validator;
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 com.google.common.base.Charsets;
import com.google.common.collect.Maps;
public class UniqueIndexValidator implements Validator {
private final String name;
private final NodeState index;
private final String path;
private final Map<String, String> insert;
private final Map<String, String> remove;
public UniqueIndexValidator(String name, NodeState index) {
this.name = name;
this.index = index;
this.path = "";
this.insert = Maps.newHashMap();
this.remove = Maps.newHashMap();
}
private UniqueIndexValidator(UniqueIndexValidator parent, String name) {
this.name = parent.name;
this.index = parent.index;
if (parent.path.isEmpty()) {
this.path = name;
} else {
this.path = parent.path + "/" + name;
}
this.insert = parent.insert;
this.remove = parent.remove;
}
public void apply(NodeBuilder unique) throws CommitFailedException {
NodeBuilder builder = unique.getChildBuilder(name);
for (Map.Entry<String, String> entry : remove.entrySet()) {
String value = encode(entry.getKey());
PropertyState property = builder.getProperty(value);
if (property != null) {
String path = entry.getValue();
if (property.isArray()
|| path.equals(property.getValue().getString())) {
builder.removeProperty(value);
}
}
}
for (Map.Entry<String, String> entry : insert.entrySet()) {
String value = encode(entry.getKey());
String path = entry.getValue();
PropertyState property = builder.getProperty(value);
if (property != null) {
if (!property.isArray()
&& !path.equals(property.getValue().getString())) {
throw new CommitFailedException(
"Uniqueness constraint violation: "
+ name + " = " + entry.getKey());
}
}
builder.setProperty(value, new StringValue(path));
}
}
private String encode(String value) {
try {
return URLEncoder.encode(value, Charsets.UTF_8.name());
} catch (UnsupportedEncodingException e) {
return value;
}
}
private void insert(Iterable<CoreValue> values)
throws CommitFailedException {
for (CoreValue value : values) {
if (insert.put(value.getString(), path) != null) {
throw new CommitFailedException(
"Uniqueness constraint violated: "
+ name + " = " + value.getString());
}
}
}
private void remove(Iterable<CoreValue> values) {
for (CoreValue value : values) {
remove.put(value.getString(), path);
}
}
@Override
public void propertyAdded(PropertyState after)
throws CommitFailedException {
if (name.equals(after.getName())) {
insert(after.getValues());
}
}
@Override
public void propertyChanged(PropertyState before, PropertyState after)
throws CommitFailedException {
if (name.equals(before.getName())) {
remove(before.getValues());
insert(after.getValues());
}
}
@Override
public void propertyDeleted(PropertyState before)
throws CommitFailedException {
if (name.equals(before.getName())) {
remove(before.getValues());
}
}
@Override
public Validator childNodeAdded(String name, NodeState after) {
return descend(name);
}
@Override
public Validator childNodeChanged(
String name, NodeState before, NodeState after) {
return descend(name);
}
@Override
public Validator childNodeDeleted(String name, NodeState before) {
return descend(name);
}
private Validator descend(String name) {
if (NodeStateUtils.isHidden(name)) {
return null;
} else {
return new UniqueIndexValidator(this, name);
}
}
}