org.apache.jackrabbit.spi2davex.ItemInfoJSONHandler Maven / Gradle / Ivy
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* 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.spi2davex;
import java.io.IOException;
import java.util.ArrayList;
import java.util.Collections;
import java.util.Iterator;
import java.util.List;
import java.util.Stack;
import javax.jcr.PropertyType;
import javax.jcr.RepositoryException;
import org.apache.jackrabbit.commons.json.JsonHandler;
import org.apache.jackrabbit.spi.ChildInfo;
import org.apache.jackrabbit.spi.IdFactory;
import org.apache.jackrabbit.spi.ItemInfo;
import org.apache.jackrabbit.spi.Name;
import org.apache.jackrabbit.spi.NodeId;
import org.apache.jackrabbit.spi.NodeInfo;
import org.apache.jackrabbit.spi.Path;
import org.apache.jackrabbit.spi.PathFactory;
import org.apache.jackrabbit.spi.PropertyId;
import org.apache.jackrabbit.spi.QValue;
import org.apache.jackrabbit.spi.commons.conversion.NamePathResolver;
import org.apache.jackrabbit.spi.commons.name.NameConstants;
import org.apache.jackrabbit.spi.commons.util.StringCache;
import org.apache.jackrabbit.util.Text;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
/**
* ItemInfoJSONHandler...
*/
class ItemInfoJsonHandler implements JsonHandler {
private static Logger log = LoggerFactory.getLogger(ItemInfoJsonHandler.class);
private static final String LEAF_NODE_HINT = "::NodeIteratorSize";
private final List itemInfos;
private final NamePathResolver resolver;
private final String rootURI;
private final QValueFactoryImpl vFactory;
private final PathFactory pFactory;
private final IdFactory idFactory;
private boolean expectingHintValue = false;
private Name name;
private int index = Path.INDEX_DEFAULT;
// temp. property state
private int propertyType;
private boolean multiValuedProperty = false;
private List propValues = new ArrayList();
private Stack nodeInfos = new Stack();
private Stack> propInfoLists = new Stack>();
ItemInfoJsonHandler(NamePathResolver resolver, NodeInfo nInfo,
String rootURI,
QValueFactoryImpl vFactory,
PathFactory pFactory,
IdFactory idFactory) {
this.resolver = resolver;
this.rootURI = rootURI;
this.vFactory = vFactory;
this.pFactory = pFactory;
this.idFactory = idFactory;
itemInfos = new ArrayList();
itemInfos.add(nInfo);
nodeInfos.push(nInfo);
propInfoLists.push(new ArrayList(8));
}
public void object() throws IOException {
if (name != null) {
try {
NodeInfo current = getCurrentNodeInfo();
Path relPath = pFactory.create(name, index);
NodeId id = idFactory.createNodeId(current.getId(), relPath);
Path currentPath = current.getPath();
Path p = pFactory.create(currentPath, relPath, true);
NodeInfo nInfo = new NodeInfoImpl(id, p);
nodeInfos.push(nInfo);
propInfoLists.push(new ArrayList(8));
} catch (RepositoryException e) {
throw new IOException(e.getMessage());
}
}
}
public void endObject() throws IOException {
try {
NodeInfoImpl nInfo = (NodeInfoImpl) nodeInfos.pop();
List props = propInfoLists.pop();
// all required information to create a node info should now be gathered
nInfo.setPropertyInfos(props.toArray(new PropertyInfoImpl[props.size()]), idFactory);
NodeInfo parent = getCurrentNodeInfo();
if (parent != null) {
if (nInfo.getPath().getAncestor(1).equals(parent.getPath())) {
ChildInfo ci = new ChildInfoImpl(nInfo.getName(), nInfo.getUniqueID(), nInfo.getIndex());
((NodeInfoImpl) parent).addChildInfo(ci);
} else {
log.debug("NodeInfo '"+ nInfo.getPath() + "' out of hierarchy. Parent path = " + parent.getPath());
}
}
if (nInfo.isCompleted()) {
itemInfos.addAll(props);
itemInfos.add(nInfo);
} else {
log.debug("Incomplete NodeInfo '"+ nInfo.getPath() + "' -> Only present as ChildInfo with its parent.");
}
} catch (RepositoryException e) {
throw new IOException(e.getMessage());
} finally {
// reset all node-related handler state
name = null;
index = Path.INDEX_DEFAULT;
}
}
public void array() throws IOException {
multiValuedProperty = true;
propValues.clear();
}
public void endArray() throws IOException {
try {
if (propertyType == PropertyType.UNDEFINED) {
if (propValues.isEmpty()) {
// make sure that type is set for mv-properties with empty value array.
propertyType = vFactory.retrieveType(getValueURI());
} else {
propertyType = propValues.get(0).getType();
}
}
// create multi-valued property info
NodeInfoImpl parent = getCurrentNodeInfo();
Path p = pFactory.create(parent.getPath(), name, true);
PropertyId id = idFactory.createPropertyId(parent.getId(), name);
PropertyInfoImpl propInfo = new PropertyInfoImpl(id, p, propertyType, propValues.toArray(new QValue[propValues.size()]));
propInfo.checkCompleted();
getCurrentPropInfos().add(propInfo);
} catch (RepositoryException e) {
throw new IOException(e.getMessage());
} finally {
// reset property-related handler state
propertyType = PropertyType.UNDEFINED;
multiValuedProperty = false;
propValues.clear();
name = null;
}
}
public void key(String key) throws IOException {
expectingHintValue = false;
try {
if (key.equals(LEAF_NODE_HINT)) {
expectingHintValue = true;
// TODO: remember name of hint if there will be additional types of hints
name = null;
} else if (key.startsWith(":")) {
expectingHintValue = true;
// either
// : : "PropertyTypeName"
// or
// : :
//name = resolver.getQName(key.substring(1));
name = resolver.getQName(StringCache.fromCacheOrNew(key.substring(1)));
index = Path.INDEX_DEFAULT;
} else if (key.endsWith("]")) {
// sns-node name
int pos = key.lastIndexOf('[');
//name = resolver.getQName(key.substring(0, pos));
name = resolver.getQName(StringCache.fromCacheOrNew(key.substring(0, pos)));
propertyType = PropertyType.UNDEFINED;
index = Integer.parseInt(key.substring(pos + 1, key.length() - 1));
} else {
// either node or property
name = resolver.getQName(StringCache.cache(key));
index = Path.INDEX_DEFAULT;
}
} catch (RepositoryException e) {
throw new IOException(e.getMessage());
}
}
/**
* there is currently one special string-value hint:
*
* : : "PropertyTypeName"
*
* @param value The value.
* @throws IOException
*/
public void value(String value) throws IOException {
if (expectingHintValue) {
// : : "PropertyTypeName"
propertyType = PropertyType.valueFromName(value);
return;
}
try {
QValue v;
switch (propertyType) {
case PropertyType.UNDEFINED:
if (!NameConstants.JCR_UUID.equals(name)) {
value = StringCache.cache(value);
}
v = vFactory.create(value, PropertyType.STRING);
break;
case PropertyType.NAME:
v = vFactory.create(resolver.getQName(value));
break;
case PropertyType.PATH:
v = vFactory.create(resolver.getQPath(value));
break;
default:
v = vFactory.create(value, propertyType);
}
value(v);
} catch (RepositoryException e) {
throw new IOException(e.getMessage());
}
}
public void value(boolean value) throws IOException {
if (expectingHintValue) {
// there are currently no special boolean value hints:
return;
}
try {
value(vFactory.create(value));
} catch (RepositoryException e) {
throw new IOException(e.getMessage());
}
}
/**
* there are currently 2 types of special long value hints:
*
* a) ::NodeIteratorSize : 0
* ==> denotes the current node as leaf node
*
* b) : :
*
* @param value The value.
* @throws IOException
*/
public void value(long value) throws IOException {
if (expectingHintValue) {
if (name == null) {
// ::NodeIteratorSize : 0
NodeInfoImpl parent = getCurrentNodeInfo();
if (parent != null) {
parent.markAsLeafNode();
}
} else {
// : :
propertyType = PropertyType.BINARY;
try {
int indx = (!multiValuedProperty) ? -1 : propValues.size();
value(vFactory.create(value, getValueURI(), indx));
} catch (RepositoryException e) {
throw new IOException(e.getMessage());
}
}
return;
}
try {
value(vFactory.create(value));
} catch (RepositoryException e) {
throw new IOException(e.getMessage());
}
}
public void value(double value) throws IOException {
if (expectingHintValue) {
// currently no special double value pair -> ignore
return;
}
try {
value(vFactory.create(value));
} catch (RepositoryException e) {
throw new IOException(e.getMessage());
}
}
//--------------------------------------------------------------------------
/**
*
* @param value
* @throws RepositoryException
*/
private void value(QValue value) throws RepositoryException {
if (!multiValuedProperty) {
try {
if (propertyType == PropertyType.UNDEFINED) {
propertyType = value.getType();
}
// create single-valued property info
NodeInfoImpl parent = getCurrentNodeInfo();
Path p = pFactory.create(parent.getPath(), name, true);
PropertyId id = idFactory.createPropertyId(parent.getId(), name);
PropertyInfoImpl propInfo = new PropertyInfoImpl(id, p, propertyType, value);
propInfo.checkCompleted();
// add property info to current list, will be processed on endObject() event
getCurrentPropInfos().add(propInfo);
} finally {
// reset property-related handler state
propertyType = PropertyType.UNDEFINED;
multiValuedProperty = false;
propValues.clear();
name = null;
expectingHintValue = false;
}
} else {
// multi-valued property
// add value to current list, will be processed on endArray() event
propValues.add(value);
}
}
Iterator getItemInfos() {
return Collections.unmodifiableList(itemInfos).iterator();
}
private NodeInfoImpl getCurrentNodeInfo() {
return (nodeInfos.isEmpty()) ? null : (NodeInfoImpl) nodeInfos.peek();
}
private List getCurrentPropInfos() {
return (propInfoLists.isEmpty()) ? null : propInfoLists.peek();
}
private String getValueURI() throws RepositoryException {
Path propertyPath = pFactory.create(getCurrentNodeInfo().getPath(), name, true);
StringBuffer sb = new StringBuffer(rootURI);
sb.append(Text.escapePath(resolver.getJCRPath(propertyPath)));
return sb.toString();
}
}
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