org.modeshape.jcr.JcrContentHandler Maven / Gradle / Ivy
/*
* ModeShape (http://www.modeshape.org)
*
* Licensed 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.modeshape.jcr;
import java.io.ByteArrayInputStream;
import java.io.IOException;
import java.io.InputStream;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.HashMap;
import java.util.HashSet;
import java.util.Iterator;
import java.util.LinkedList;
import java.util.List;
import java.util.Map;
import java.util.Set;
import javax.jcr.Binary;
import javax.jcr.ImportUUIDBehavior;
import javax.jcr.InvalidItemStateException;
import javax.jcr.ItemExistsException;
import javax.jcr.ItemNotFoundException;
import javax.jcr.PathNotFoundException;
import javax.jcr.PropertyType;
import javax.jcr.RepositoryException;
import javax.jcr.Value;
import javax.jcr.ValueFactory;
import javax.jcr.ValueFormatException;
import javax.jcr.nodetype.ConstraintViolationException;
import org.modeshape.common.SystemFailureException;
import org.modeshape.common.annotation.NotThreadSafe;
import org.modeshape.common.collection.Collections;
import org.modeshape.common.collection.LinkedHashMultimap;
import org.modeshape.common.text.TextDecoder;
import org.modeshape.common.text.XmlNameEncoder;
import org.modeshape.common.util.Base64;
import org.modeshape.common.util.StringUtil;
import org.modeshape.jcr.cache.CachedNode;
import org.modeshape.jcr.cache.CachedNode.ReferenceType;
import org.modeshape.jcr.cache.MutableCachedNode;
import org.modeshape.jcr.cache.NodeKey;
import org.modeshape.jcr.cache.ReferrerCounts;
import org.modeshape.jcr.cache.SessionCache;
import org.modeshape.jcr.value.Name;
import org.modeshape.jcr.value.NameFactory;
import org.modeshape.jcr.value.NamespaceRegistry;
import org.modeshape.jcr.value.Path;
import org.modeshape.jcr.value.PathFactory;
import org.modeshape.jcr.value.Property;
import org.modeshape.jcr.value.PropertyFactory;
import org.modeshape.jcr.value.basic.NodeKeyReference;
import org.xml.sax.Attributes;
import org.xml.sax.ContentHandler;
import org.xml.sax.SAXException;
import org.xml.sax.helpers.DefaultHandler;
/**
* Content handler that provides SAX-based event handling that maps incoming documents to the repository based on the
* functionality described in section 7.3 of the JCR 1.0.1 specification.
*
* Each content handler is only intended to be used once and discarded. This class is NOT thread-safe.
*
*
* @see JcrSession#getImportContentHandler(String, int)
* @see JcrWorkspace#getImportContentHandler(String, int)
*/
@NotThreadSafe
class JcrContentHandler extends DefaultHandler {
/**
* Encoder to properly escape XML names.
*
* @see XmlNameEncoder
*/
protected static final TextDecoder SYSTEM_VIEW_NAME_DECODER = new XmlNameEncoder();
protected static final TextDecoder DOCUMENT_VIEW_NAME_DECODER = JcrDocumentViewExporter.NAME_DECODER;
protected static final TextDecoder DOCUMENT_VIEW_VALUE_DECODER = JcrDocumentViewExporter.VALUE_DECODER;
protected static final List INTERNAL_MIXINS = Arrays.asList(JcrMixLexicon.VERSIONABLE.getString().toLowerCase());
private static final String ALT_XML_SCHEMA_NAMESPACE_PREFIX = "xsd";
protected final NamespaceRegistry namespaces;
protected final int uuidBehavior;
protected final boolean retentionInfoRetained;
protected final boolean lifecycleInfoRetained;
protected final List nodesForPostProcessing = new LinkedList<>();
protected final Map uuidToNodeKeyMapping = new HashMap<>();
protected final Set importedNodeKeys = new HashSet<>();
protected final Map shareIdsToUUIDMap = new HashMap<>();
protected final Map referrersByNodeKey = new HashMap<>();
protected final LinkedHashMultimap allReferenceProperties = LinkedHashMultimap.create();
protected SessionCache cache;
protected final String primaryTypeName;
protected final String mixinTypesName;
protected final String uuidName;
private final JcrSession session;
private final ExecutionContext context;
private final NameFactory nameFactory;
private final PathFactory pathFactory;
private final org.modeshape.jcr.value.ValueFactory stringFactory;
private final ValueFactory jcrValueFactory;
private final JcrNodeTypeManager nodeTypes;
private final org.modeshape.jcr.api.NamespaceRegistry jcrNamespaceRegistry;
private final boolean saveWhenCompleted;
private final String systemWorkspaceKey;
private AbstractJcrNode currentNode;
private ContentHandler delegate;
JcrContentHandler( JcrSession session,
AbstractJcrNode parent,
int uuidBehavior,
boolean saveWhenCompleted,
boolean retentionInfoRetained,
boolean lifecycleInfoRetained ) throws PathNotFoundException, RepositoryException {
assert session != null;
assert uuidBehavior == ImportUUIDBehavior.IMPORT_UUID_CREATE_NEW
|| uuidBehavior == ImportUUIDBehavior.IMPORT_UUID_COLLISION_REMOVE_EXISTING
|| uuidBehavior == ImportUUIDBehavior.IMPORT_UUID_COLLISION_REPLACE_EXISTING
|| uuidBehavior == ImportUUIDBehavior.IMPORT_UUID_COLLISION_THROW;
this.session = session;
this.session.initBaseVersionKeys();
this.context = this.session.context();
this.namespaces = context.getNamespaceRegistry();
this.nameFactory = context.getValueFactories().getNameFactory();
this.pathFactory = context.getValueFactories().getPathFactory();
this.stringFactory = context.getValueFactories().getStringFactory();
this.uuidBehavior = uuidBehavior;
this.retentionInfoRetained = retentionInfoRetained;
this.lifecycleInfoRetained = lifecycleInfoRetained;
this.saveWhenCompleted = saveWhenCompleted;
this.cache = session.cache();
this.currentNode = parent;
this.jcrValueFactory = session.getValueFactory();
this.nodeTypes = session.nodeTypeManager();
this.jcrNamespaceRegistry = (org.modeshape.jcr.api.NamespaceRegistry)session.workspace().getNamespaceRegistry();
this.primaryTypeName = JcrLexicon.PRIMARY_TYPE.getString(this.namespaces);
this.mixinTypesName = JcrLexicon.MIXIN_TYPES.getString(this.namespaces);
this.uuidName = JcrLexicon.UUID.getString(this.namespaces);
this.systemWorkspaceKey = session.repository().systemWorkspaceKey();
}
protected final JcrSession session() {
return session;
}
protected final NamespaceRegistry namespaces() {
return namespaces;
}
protected final JcrNodeTypeManager nodeTypes() {
return nodeTypes;
}
protected final JcrNodeType nodeTypeFor( String name ) {
return nodeTypes.getNodeType(nameFor(name));
}
protected final Map propertyTypesFor( String primaryTypeName ) {
Map propertyTypesMap = new HashMap<>();
JcrNodeType nodeType = nodeTypeFor(primaryTypeName);
if (nodeType == null) {
// nt:share falls in this category
return propertyTypesMap;
}
for (JcrPropertyDefinition propertyDefinition : nodeType.getPropertyDefinitions()) {
propertyTypesMap.put(propertyDefinition.getInternalName(), propertyDefinition.getRequiredType());
}
return propertyTypesMap;
}
protected final String stringFor( Object name ) {
return stringFactory.create(name);
}
protected final Name nameFor( String name ) {
return nameFactory.create(name);
}
protected final Name nameFor( String namespaceUri,
String localName ) {
return nameFactory.create(namespaceUri, localName);
}
protected final Path pathFor( Path parentPath,
Name... names ) {
return pathFactory.create(parentPath, names);
}
protected final Value valueFor( String value,
int type ) throws ValueFormatException {
return jcrValueFactory.createValue(value, type);
}
protected final Value valueFor( InputStream stream ) throws RepositoryException {
Binary binary = jcrValueFactory.createBinary(stream);
return jcrValueFactory.createValue(binary);
}
protected final SessionCache cache() {
return cache;
}
protected final boolean isInternal(Name propertyName) {
return
propertyName.getNamespaceUri().equals(JcrLexicon.Namespace.URI) ||
propertyName.getNamespaceUri().equals(JcrNtLexicon.Namespace.URI) ||
propertyName.getNamespaceUri().equals(ModeShapeLexicon.NAMESPACE.getNamespaceUri());
}
protected void postProcessNodes() throws SAXException {
try {
// first make sure all the necessary reference properties have been set
processReferences();
for (AbstractJcrNode node : nodesForPostProcessing) {
MutableCachedNode mutable = node.mutable();
// ---------------
// mix:versionable
// ---------------
if (node.isNodeType(JcrMixLexicon.VERSIONABLE)) {
// Does the versionable node already have a reference to the version history?
// If so, then we ignore it because we'll use our own key ...
// Does the versionable node already have a base version?
AbstractJcrProperty baseVersionProp = node.getProperty(JcrLexicon.BASE_VERSION);
if (baseVersionProp != null) {
// we rely on the fact that the base version ref is exported with full key
NodeKeyReference baseVersionRef = (NodeKeyReference)baseVersionProp.getValue().value();
String workspaceKey = baseVersionRef.getNodeKey().getWorkspaceKey();
//we only register the base version if it comes from the system workspace (if it doesn't come from the
//system workspace, it's not valid - e.g. could be coming from an older version of ModeShape)
if (systemWorkspaceKey.equals(workspaceKey)) {
session.setDesiredBaseVersionKey(node.key(), baseVersionRef.getNodeKey());
}
}
}
// ---------------
// mix:lockable
// ---------------
if (node.isNodeType(JcrMixLexicon.LOCKABLE) && node.isLocked()) {
// Nodes should not be locked upon import ...
node.unlock();
}
// ---------------
// mix:lifecycle
// ---------------
if (node.isNodeType(JcrMixLexicon.LIFECYCLE)) {
if (lifecycleInfoRetained && !isValidReference(node, JcrLexicon.LIFECYCLE_POLICY, false)) {
// The 'jcr:lifecyclePolicy' REFERENCE values is not valid or does not reference an existing node,
// so the 'jcr:lifecyclePolicy' and 'jcr:currentLifecycleState' properties should be removed...
mutable.removeProperty(cache, JcrLexicon.LIFECYCLE_POLICY);
mutable.removeProperty(cache, JcrLexicon.CURRENT_LIFECYCLE_STATE);
}
}
// --------------------
// mix:managedRetention
// --------------------
if (node.isNodeType(JcrMixLexicon.MANAGED_RETENTION)) {
if (retentionInfoRetained && !isValidReference(node, JcrLexicon.RETENTION_POLICY, false)) {
// The 'jcr:retentionPolicy' REFERENCE values is not valid or does not reference an existing node,
// so the 'jcr:retentionPolicy', 'jcr:hold' and 'jcr:isDeep' properties should be removed ...
mutable.removeProperty(cache, JcrLexicon.HOLD);
mutable.removeProperty(cache, JcrLexicon.IS_DEEP);
mutable.removeProperty(cache, JcrLexicon.RETENTION_POLICY);
}
}
// --------------------
// mix:share
// --------------------
if (node.isNodeType(ModeShapeLexicon.SHARE)) {
// get the actual key of the shareable node
String shareableNodeUUID = shareIdsToUUIDMap.get(node.key());
assert shareableNodeUUID != null;
NodeKey shareableNodeKey = uuidToNodeKeyMapping.get(shareableNodeUUID);
assert shareableNodeKey != null;
// unlink the current key from its parent references
NodeKey parentKey = mutable.getParentKey(cache);
MutableCachedNode parent = cache.mutable(parentKey);
parent.removeChild(cache, node.key());
// re-link it with the correct key - that of the shareable node
parent.linkChild(cache, shareableNodeKey, node.name());
}
}
} catch (RepositoryException e) {
throw new EnclosingSAXException(e);
}
}
private void processReferences() throws RepositoryException {
// if there were any reference properties imported, they can only be set on the corresponding nodes *after* all
// the graph has been imported
for (Map.Entry entry : this.allReferenceProperties.entries()) {
AbstractJcrNode node = session.node(entry.getKey(), null);
ReferenceProperty referenceProperty = entry.getValue();
AbstractJcrProperty property = null;
// set the reference property without validating it first
if (!referenceProperty.isMultiple()) {
property = node.setProperty(referenceProperty.name(), referenceProperty.value(), true, true, true,
false);
} else {
property = node.setProperty(referenceProperty.name(), referenceProperty.values(),
referenceProperty.type(), true, true, false, true);
}
// check if there are any public hard references with constraints in which case we should validate them
// this should not look at any internal (protected) references as they may be changed later on
if (property.getType() == PropertyType.REFERENCE &&
property.getDefinition().getValueConstraints().length != 0 &&
!property.getDefinition().isProtected()) {
if (!isValidReference(property)) {
JcrPropertyDefinition defn = property.getDefinition();
String name = stringFor(property.name());
String path = property.getParent().getPath();
throw new ConstraintViolationException(JcrI18n.constraintViolatedOnReference.text(name, path, defn));
}
}
}
// Restore the back references on the nodes which have been removed/replaced by the import and which have referrers
// outside the graph of nodes that was imported
for (Map.Entry entry : referrersByNodeKey.entrySet()) {
PropertyFactory propFactory = context.getPropertyFactory();
MutableCachedNode referred = cache.mutable(entry.getKey());
ReferrerCounts counts = entry.getValue();
if (referred != null && counts != null) {
// Add in the strong and weak referrers (that are outside the import scope) that used to be in the node
// before it was replaced ...
for (NodeKey key : counts.getStrongReferrers()) {
int count = counts.countStrongReferencesFrom(key);
for (int i = 0; i != count; ++i) {
Property prop = propFactory.create(nameFor(key.toString() + i));
referred.addReferrer(cache, prop, key, ReferenceType.STRONG);
}
}
for (NodeKey key : counts.getWeakReferrers()) {
int count = counts.countWeakReferencesFrom(key);
for (int i = 0; i != count; ++i) {
Property prop = propFactory.create(nameFor(key.toString() + i));
referred.addReferrer(cache, prop, key, ReferenceType.WEAK);
}
}
}
}
}
protected boolean isValidReference( AbstractJcrNode node,
Name propertyName,
boolean returnValueIfNoProperty ) throws RepositoryException {
AbstractJcrProperty property = node.getProperty(propertyName);
return property == null ? returnValueIfNoProperty : isValidReference(property);
}
protected boolean isValidReference( AbstractJcrProperty property ) throws RepositoryException {
JcrPropertyDefinition defn = property.getDefinition();
if (defn == null) return false;
if (property.isMultiple()) {
for (Value value : property.getValues()) {
if (!defn.canCastToTypeAndSatisfyConstraints(value, session)) {
// We know it's not valid, so return ...
return false;
}
}
// All values appeared to be valid ...
return true;
}
// Just a single value ...
return defn.canCastToTypeAndSatisfyConstraints(property.getValue(), session);
}
@Override
public void characters( char[] ch,
int start,
int length ) throws SAXException {
assert this.delegate != null;
delegate.characters(ch, start, length);
}
@Override
public void endDocument() throws SAXException {
postProcessNodes();
if (saveWhenCompleted) {
try {
session.save();
} catch (RepositoryException e) {
throw new SAXException(e);
}
}
super.endDocument();
}
@Override
public void endElement( String uri,
String localName,
String name ) throws SAXException {
assert this.delegate != null;
delegate.endElement(uri, localName, name);
}
@Override
public void startElement( String uri,
String localName,
String name,
Attributes atts ) throws SAXException {
checkDelegate(uri);
assert this.delegate != null;
delegate.startElement(uri, localName, name, atts);
}
private void checkDelegate( String namespaceUri ) {
if (delegate != null) return;
if (JcrSvLexicon.Namespace.URI.equals(namespaceUri)) {
this.delegate = new SystemViewContentHandler(this.currentNode);
} else {
this.delegate = new DocumentViewContentHandler(this.currentNode);
}
}
protected static byte[] decodeBase64( String value ) throws IOException {
try {
return Base64.decode(value.getBytes("UTF-8"));
} catch (IOException e) {
// try re-reading, in case this was an export from a prior ModeShape version that used URL_SAFE ...
return Base64.decode(value, Base64.URL_SAFE);
}
}
protected static String decodeBase64AsString( String value ) throws IOException {
byte[] decoded = decodeBase64(value);
return new String(decoded, "UTF-8");
}
@Override
public void startPrefixMapping( String prefix,
String uri ) throws SAXException {
try {
if (ALT_XML_SCHEMA_NAMESPACE_PREFIX.equals(prefix) && uri.equals(JcrNamespaceRegistry.XML_SCHEMA_NAMESPACE_URI)) {
prefix = JcrNamespaceRegistry.XML_SCHEMA_NAMESPACE_PREFIX;
}
// Read from the workspace's ModeShape registry, as its semantics are more friendly
String existingUri = namespaces.getNamespaceForPrefix(prefix);
if (existingUri != null) {
if (existingUri.equals(uri)) {
// prefix/uri mapping is already in registry
return;
}
// The prefix is used and it does not match the registered namespace. Therefore, register using
// a generated namespace ...
this.jcrNamespaceRegistry.registerNamespace(uri);
} else {
// It is not yet registered, so register through the JCR workspace to ensure consistency
this.jcrNamespaceRegistry.registerNamespace(prefix, uri);
}
} catch (RepositoryException re) {
throw new EnclosingSAXException(re);
}
}
class EnclosingSAXException extends SAXException {
private static final long serialVersionUID = -1044992767566435542L;
EnclosingSAXException( Exception e ) {
super(e);
}
}
// ----------------------------------------------------------------------------------------------------------------
// NodeHandler framework ...
// ----------------------------------------------------------------------------------------------------------------
@SuppressWarnings( "unused" )
protected abstract class NodeHandler {
public void finish() throws SAXException {
}
public AbstractJcrNode node() throws SAXException {
return null;
}
public NodeHandler parentHandler() {
return null;
}
public boolean ignoreAllChildren() {
return false;
}
public void addPropertyValue( Name name,
String value,
boolean forceMultiValued,
int propertyType,
TextDecoder decoder ) throws EnclosingSAXException {
}
protected String name() {
try {
Path path = node().path();
return path.isRoot() ? "" : stringFor(path.getLastSegment());
} catch (Exception e) {
throw new SystemFailureException(e);
}
}
@Override
public String toString() {
NodeHandler parent = parentHandler();
if (parent != null) {
return parent.toString() + "/" + name();
}
try {
return node().getPath();
} catch (Throwable e) {
try {
return node().toString();
} catch (SAXException e2) {
throw new SystemFailureException(e2);
}
}
}
}
/**
* Some nodes need additional post-processing upon import, and this set of property names is used to come up with the nodes
* that may need to be post-processed.
*
* Really, the nodes that need to be post-processed are best found using the node types of each node. However, that is more
* expensive to compute. Thus, we'll collect the candidate nodes that are candidates for post-processing, then in the
* post-processing we can more effectively and efficiently use the node types.
*
*
* Currently, we want to post-process nodes that contain repository-level semantics. In other words, nodes that are of the
* following node types:
*
* mix:versionablemix:lockablemix:lifecyclemix:managedRetention
* The mix:simpleVersionable would normally also be included here, except that the jcr:isCheckedOut
* property is a boolean value that doesn't need any particular post-processing.
*
*
* Some of these node types has a mandatory property, so the names of these mandatory properties are used to quickly determine
* candidates for post-processing. In cases where there is no mandatory property, then the set of all properties for that node
* type are included:
*
* mix:versionable --> jcr:baseVersion (mandatory)mix:lockable --> jcr:lockOwner and jcr:lockIsDeepmix:lifecycle --> jcr:lifecyclePolicy and jcr:currentLifecycleStatemix:managedRetention --> jcr:hold, jcr:isDeep, and
* jcr:retentionPolicy
*
*/
protected static final Set PROPERTIES_FOR_POST_PROCESSING = Collections.unmodifiableSet(
/* 'mix:lockable' has two optional properties */
JcrLexicon.LOCK_IS_DEEP, JcrLexicon.LOCK_OWNER,
/* 'mix:versionable' has several mandatory properties, but we only need to check one */
JcrLexicon.BASE_VERSION,
/* 'mix:lifecycle' has two optional properties */
JcrLexicon.LIFECYCLE_POLICY, JcrLexicon.CURRENT_LIFECYCLE_STATE,
/* 'mix:managedRetention' has three optional properties */
JcrLexicon.HOLD, JcrLexicon.IS_DEEP, JcrLexicon.RETENTION_POLICY);
protected class BasicNodeHandler extends NodeHandler {
private final Map> properties;
private final Set multiValuedPropertyNames;
private final Name nodeName;
private NodeHandler parentHandler;
private AbstractJcrNode node;
private final int uuidBehavior;
private boolean postProcessed = false;
private boolean ignoreAllChildren = false;
protected BasicNodeHandler( Name name,
NodeHandler parentHandler,
int uuidBehavior ) {
this.nodeName = name;
this.parentHandler = parentHandler;
this.properties = new HashMap<>();
this.multiValuedPropertyNames = new HashSet<>();
this.uuidBehavior = uuidBehavior;
}
@Override
public void finish() throws SAXException {
node();
}
@Override
public boolean ignoreAllChildren() {
return ignoreAllChildren;
}
@Override
protected String name() {
return stringFor(nodeName);
}
@Override
public AbstractJcrNode node() throws SAXException {
if (node == null) create();
assert node != null;
return node;
}
@Override
public NodeHandler parentHandler() {
return parentHandler;
}
@Override
public void addPropertyValue( Name name,
String value,
boolean forceMultiValued,
int propertyType,
TextDecoder decoder ) throws EnclosingSAXException {
if (forceMultiValued) {
this.multiValuedPropertyNames.add(name);
}
try {
if (node != null) {
if (JcrLexicon.PRIMARY_TYPE.equals(name)) return;
if (JcrLexicon.MIXIN_TYPES.equals(name)) return;
if (JcrLexicon.UUID.equals(name)) return;
// The node was already created, so set the property using the editor ...
node.setProperty(name, (JcrValue)valueFor(value, propertyType), true, true, true, false);
} else {
// The node hasn't been created yet, so just enqueue the property value into the map ...
List values = properties.get(name);
if (values == null) {
values = new ArrayList<>();
properties.put(name, values);
}
if (propertyType == PropertyType.BINARY) {
Base64.InputStream is = new Base64.InputStream(new ByteArrayInputStream(value.getBytes("UTF-8")));
values.add(valueFor(is));
} else {
if (decoder != null) value = decoder.decode(value);
if (value != null && propertyType == PropertyType.STRING) {
// Strings and binaries can be empty -- other data types cannot
values.add(valueFor(value, propertyType));
} else if (!StringUtil.isBlank(value) && isReference(propertyType)) {
try {
boolean isInternalReference = isInternal(name);
if (!isInternalReference) {
// we only prepend the parent information for non-internal references
value = parentHandler().node().key().withId(value).toString();
}
// we only have the identifier of the node, so try to use the parent to determine the workspace &
// source key
values.add(valueFor(value, propertyType));
} catch (SAXException e) {
throw new EnclosingSAXException(e);
}
} else if (!StringUtil.isBlank(value)) {
values.add(valueFor(value, propertyType));
}
}
}
if (!postProcessed && PROPERTIES_FOR_POST_PROCESSING.contains(name)) {
postProcessed = true;
}
} catch (IOException | RepositoryException ioe) {
throw new EnclosingSAXException(ioe);
}
}
protected void create() throws SAXException {
try {
AbstractJcrNode parent = parentHandler.node();
final NodeKey parentKey = parent.key();
assert parent != null;
// Figure out the key for the node ...
NodeKey key = null;
List rawUuid = properties.get(JcrLexicon.UUID);
String uuid = null;
boolean shareableNodeAlreadyExists = false;
if (rawUuid != null) {
assert rawUuid.size() == 1;
uuid = rawUuid.get(0).getString();
key = parentKey.withId(uuid);
try {
// Deal with any existing node ...
AbstractJcrNode existingNode = session().node(key, null, parentKey);
switch (uuidBehavior) {
case ImportUUIDBehavior.IMPORT_UUID_COLLISION_REPLACE_EXISTING:
parent = existingNode.getParent();
// Attention: this *does not* remove the entry from the DB (ISPN). Therefore, it's always
// accessible
// to the workspace cache and thus to the current session !!!.
// Therefore, *old properties, mixins etc* will be accessible on the new child created later on
// until a session.save() is performed.
preRemoveNode(existingNode);
existingNode.remove();
break;
case ImportUUIDBehavior.IMPORT_UUID_CREATE_NEW:
key = cache().getRootKey().withRandomId();
break;
case ImportUUIDBehavior.IMPORT_UUID_COLLISION_REMOVE_EXISTING:
if (existingNode.path().isAtOrAbove(parent.path())) {
String text = JcrI18n.cannotRemoveParentNodeOfTarget.text(existingNode.getPath(),
key,
parent.getPath());
throw new ConstraintViolationException(text);
}
// Attention: this *does not* remove the entry from the DB (ISPN). Therefore, it's always
// accessible
// to the workspace cache and thus to the current session !!!.
// Therefore, *old properties, mixins etc* will be accessible on the new child created later on
// until a session.save() is performed.
preRemoveNode(existingNode);
existingNode.remove();
break;
case ImportUUIDBehavior.IMPORT_UUID_COLLISION_THROW:
if (existingNode.isShareable()) {
shareableNodeAlreadyExists = true;
} else {
throw new ItemExistsException(JcrI18n.itemAlreadyExistsWithUuid.text(key,
session().workspace()
.getName(),
existingNode.getPath()));
}
}
} catch (ItemNotFoundException e) {
// there wasn't an existing item, so just continue
}
}
// See if the node was already autocreated by the parent
AbstractJcrNode existingNode = parent.getNodeIfExists(nodeName);
boolean nodeAlreadyExists = existingNode != null && existingNode.getDefinition().isAutoCreated();
// Create the new node ...
AbstractJcrNode child;
if (!nodeAlreadyExists) {
List primaryTypeValueList = properties.get(JcrLexicon.PRIMARY_TYPE);
String typeName = primaryTypeValueList != null ? primaryTypeValueList.get(0).getString() : null;
Name primaryTypeName = nameFor(typeName);
if (JcrNtLexicon.SHARE.equals(primaryTypeName)) {
assert key != null;
assert uuid != null;
// check if we already have the key of the shareable node
NodeKey shareableNodeKey = uuidToNodeKeyMapping.get(uuid);
if (shareableNodeKey != null) {
// we already know the key of the shareable node, so we need to just link it and return
parent.mutable().linkChild(cache, shareableNodeKey, nodeName);
node = session().node(shareableNodeKey, null, parentKey);
} else {
// we haven't processed the shareable node yet, so we need to make sure we process the share later.
parent.mutable().linkChild(cache, key, nodeName);
node = session().node(key, null, parentKey);
// make sure we post-process the share and set the correct id
nodesForPostProcessing.add(node);
// save the original UUID of the share to be able to track it back to the shareable node
shareIdsToUUIDMap.put(key, uuid);
}
ignoreAllChildren = true;
return;
}
// store the node key that we created for this UUID, so we can create shares
uuidToNodeKeyMapping.put(uuid, key);
if (shareableNodeAlreadyExists && key != null) {
parent.mutable().linkChild(cache, key, nodeName);
node = session().node(key, null, parentKey);
ignoreAllChildren = true;
return;
}
// Otherwise, it's just a regular node...
child = parent.addChildNode(nodeName, primaryTypeName, key, true, false);
} else {
child = existingNode;
}
assert child != null;
// Set the properties on the new node ...
// Set the mixin types first (before we set any properties that may require the mixins to be present) ...
List mixinTypeValueList = properties.get(JcrLexicon.MIXIN_TYPES);
if (mixinTypeValueList != null) {
for (Value value : mixinTypeValueList) {
String mixinName = value.getString();
// in the case when keys are being reused, the old node at that key is visible (with all its properties)
// via the WS cache -> ISPN db. Therefore, there might be the case when even though the child was created
// via addChild(), the old node with all the old properties and mixins is still visible at the key() and
// so the "new child" reports the mixin as already present (even though it's not)
boolean addMixinInternally = (child.isNodeType(mixinName) && !nodeAlreadyExists) ||
INTERNAL_MIXINS.contains(mixinName.toLowerCase());
if (addMixinInternally) {
child.mutable().addMixin(child.sessionCache(), nameFor(mixinName));
} else {
child.addMixin(mixinName);
}
}
}
for (Map.Entry> entry : properties.entrySet()) {
Name propertyName = entry.getKey();
// These are all handled earlier ...
if (JcrLexicon.PRIMARY_TYPE.equals(propertyName)) {
continue;
}
if (JcrLexicon.MIXIN_TYPES.equals(propertyName)) {
continue;
}
if (JcrLexicon.UUID.equals(propertyName)) {
continue;
}
List values = entry.getValue();
boolean allowEmptyValues = !isInternal(propertyName) || JcrLexicon.DATA.equals(propertyName);
if (values.size() == 1 && !this.multiValuedPropertyNames.contains(propertyName)) {
JcrValue value = (JcrValue)values.get(0);
if (!allowEmptyValues && StringUtil.isBlank(value.getString())) {
//if an empty value has creeped here it means we weren't able to perform proper type validation earlier
continue;
}
if (isReference(value.getType())) {
// if this is a reference, we won't set it on the node until we've finished loading all the nodes
ReferenceProperty referenceProperty = new ReferenceProperty(propertyName, value);
allReferenceProperties.put(child.key(), referenceProperty);
nodesForPostProcessing.add(child);
} else {
// Don't check references or the protected status ...
child.setProperty(propertyName, value, true, true, true, false);
}
} else {
if (!allowEmptyValues) {
for (Iterator iterator = values.iterator(); iterator.hasNext();) {
if (StringUtil.isBlank(iterator.next().getString())) {
iterator.remove();
}
}
}
if (!values.isEmpty()) {
Value[] processedValues = values.toArray(new Value[values.size()]);
if (isReference(processedValues[0].getType())) {
// if this is a reference, we won't set it on the node until we've finished loading all the nodes
ReferenceProperty referenceProperty = new ReferenceProperty(propertyName, processedValues);
allReferenceProperties.put(child.key(), referenceProperty);
nodesForPostProcessing.add(child);
} else {
// Don't check references or the protected status ...
child.setProperty(propertyName, processedValues, PropertyType.UNDEFINED, true, true, false,
true);
}
}
}
}
node = child;
importedNodeKeys.add(node.key());
if (postProcessed) {
// This node needs to be post-processed ...
nodesForPostProcessing.add(node);
}
} catch (RepositoryException re) {
throw new EnclosingSAXException(re);
}
}
/**
* Handle any operations before a node is removed or replaced by an imported node.
*
* @param removedNode the removed node
*/
protected void preRemoveNode( AbstractJcrNode removedNode ) {
// Figure out if the node has backreferences ...
CachedNode node;
try {
node = removedNode.node();
ReferrerCounts referrers = node.getReferrerCounts(cache);
if (referrers != null) referrersByNodeKey.put(node.getKey(), referrers);
} catch (ItemNotFoundException | InvalidItemStateException err) {
// do nothing ...
}
}
}
protected boolean isReference( int propertyType ) {
return (propertyType == PropertyType.REFERENCE ||
propertyType == PropertyType.WEAKREFERENCE ||
propertyType == org.modeshape.jcr.api.PropertyType.SIMPLE_REFERENCE);
}
protected class ExistingNodeHandler extends NodeHandler {
private final AbstractJcrNode node;
private final NodeHandler parentHandler;
protected ExistingNodeHandler( AbstractJcrNode node,
NodeHandler parentHandler ) {
this.node = node;
this.parentHandler = parentHandler;
}
@Override
public AbstractJcrNode node() {
return node;
}
@Override
public NodeHandler parentHandler() {
return parentHandler;
}
@Override
public void addPropertyValue( Name propertyName,
String value,
boolean forceMultiValued,
int propertyType,
TextDecoder decoder ) {
throw new UnsupportedOperationException();
}
}
protected class JcrRootHandler extends ExistingNodeHandler {
protected JcrRootHandler( AbstractJcrNode root ) {
super(root, null);
}
@Override
public void addPropertyValue( Name propertyName,
String value,
boolean forceMultiValued,
int propertyType,
TextDecoder decoder ) {
// do nothing ...
}
}
protected class IgnoreBranchHandler extends NodeHandler {
private NodeHandler parentHandler;
protected IgnoreBranchHandler( NodeHandler parentHandler ) {
this.parentHandler = parentHandler;
}
@Override
public NodeHandler parentHandler() {
return parentHandler;
}
}
protected class JcrSystemHandler extends IgnoreBranchHandler {
protected JcrSystemHandler( NodeHandler parentHandler ) {
super(parentHandler);
}
}
protected interface NodeHandlerFactory {
NodeHandler createFor( Name nodeName,
NodeHandler parentHandler,
int uuidBehavior ) throws SAXException;
}
protected class StandardNodeHandlerFactory implements NodeHandlerFactory {
@Override
public NodeHandler createFor( Name name,
NodeHandler parentHandler,
int uuidBehavior ) throws SAXException {
if (parentHandler instanceof IgnoreBranchHandler || parentHandler.ignoreAllChildren()) {
return new IgnoreBranchHandler(parentHandler);
}
if (JcrLexicon.ROOT.equals(name)) {
try {
JcrRootNode rootNode = session().getRootNode();
return new JcrRootHandler(rootNode);
} catch (RepositoryException re) {
throw new EnclosingSAXException(re);
}
}
if (JcrLexicon.SYSTEM.equals(name)) {
// Always do this, regardless of where the "jcr:system" branch is located ...
return new JcrSystemHandler(parentHandler);
}
return new BasicNodeHandler(name, parentHandler, uuidBehavior);
}
}
private class SystemViewContentHandler extends DefaultHandler {
private final String svNameName;
private final String svTypeName;
private final String svMultipleName;
private NodeHandler current;
private final NodeHandlerFactory nodeHandlerFactory;
private String currentPropertyName;
private int currentPropertyType;
private boolean currentPropertyValueIsBase64Encoded;
private boolean currentPropertyIsMultiValued;
private final StringBuilder currentPropertyValue;
SystemViewContentHandler( AbstractJcrNode parent ) {
super();
this.svNameName = JcrSvLexicon.NAME.getString(namespaces());
this.svTypeName = JcrSvLexicon.TYPE.getString(namespaces());
this.svMultipleName = JcrSvLexicon.MULTIPLE.getString(namespaces());
this.current = new ExistingNodeHandler(parent, null);
this.nodeHandlerFactory = new StandardNodeHandlerFactory();
this.currentPropertyValue = new StringBuilder();
}
@Override
public void startElement( String uri,
String localName,
String name,
Attributes atts ) throws SAXException {
// Always reset the string builder at the beginning of an element
currentPropertyValue.setLength(0);
currentPropertyValueIsBase64Encoded = false;
if ("node".equals(localName)) {
// Finish the parent handler ...
current.finish();
// Create a new handler for this element ...
String nodeName = atts.getValue(SYSTEM_VIEW_NAME_DECODER.decode(svNameName));
current = nodeHandlerFactory.createFor(nameFor(nodeName), current, uuidBehavior);
} else if ("property".equals(localName)) {
currentPropertyName = atts.getValue(SYSTEM_VIEW_NAME_DECODER.decode(svNameName));
currentPropertyType = org.modeshape.jcr.api.PropertyType.valueFromName(atts.getValue(svTypeName));
String svMultiple = atts.getValue(svMultipleName);
currentPropertyIsMultiValued = Boolean.TRUE.equals(Boolean.valueOf(svMultiple));
} else if ("value".equals(localName)) {
// See if there is an "xsi:type" attribute on this element, which means the property value contained
// characters that cannot be represented in XML without escaping. See Section 11.2, Item 11.b ...
String xsiType = atts.getValue("http://www.w3.org/2001/XMLSchema-instance", "type");
if (StringUtil.isBlank(xsiType)) {
return;
}
String propertyPrefix = namespaces.getPrefixForNamespaceUri("http://www.w3.org/2001/XMLSchema", false);
if (StringUtil.isBlank(propertyPrefix)) {
return;
}
String base64TypeName = propertyPrefix + ":base64Binary";
currentPropertyValueIsBase64Encoded = base64TypeName.equals(xsiType);
} else if (!"value".equals(localName)) {
throw new IllegalStateException("Unexpected element '" + name + "' in system view");
}
}
@Override
public void characters( char[] ch,
int start,
int length ) {
currentPropertyValue.append(ch, start, length);
}
@Override
public void endElement( String uri,
String localName,
String name ) throws SAXException {
switch (localName) {
case "node":
current.finish(); // make sure the node is created
current = current.parentHandler();
break;
case "value":
// Add the content for the current property ...
String currentPropertyString = currentPropertyValue.toString();
if (currentPropertyValueIsBase64Encoded) {
// The current string is a base64 encoded string, so we need to decode it first ...
try {
currentPropertyString = decodeBase64AsString(currentPropertyString);
} catch (IOException ioe) {
throw new EnclosingSAXException(ioe);
}
}
current.addPropertyValue(nameFor(currentPropertyName),
currentPropertyString,
currentPropertyIsMultiValued,
currentPropertyType,
SYSTEM_VIEW_NAME_DECODER);
break;
case "property":
break;
default:
throw new IllegalStateException("Unexpected element '" + name + "' in system view");
}
}
}
private class DocumentViewContentHandler extends DefaultHandler {
private NodeHandler current;
private final NodeHandlerFactory nodeHandlerFactory;
DocumentViewContentHandler( AbstractJcrNode currentNode ) {
super();
this.current = new ExistingNodeHandler(currentNode, null);
this.nodeHandlerFactory = new StandardNodeHandlerFactory();
}
@Override
public void startElement( String uri,
String localName,
String name,
Attributes atts ) throws SAXException {
// Create the new handler for the new node ...
String decodedLocalName = DOCUMENT_VIEW_NAME_DECODER.decode(localName);
current = nodeHandlerFactory.createFor(nameFor(uri, decodedLocalName), current, uuidBehavior);
List allTypes = new ArrayList<>();
Map propertiesNamesValues = new HashMap<>();
for (int i = 0; i < atts.getLength(); i++) {
Name propertyName = nameFor(atts.getURI(i), DOCUMENT_VIEW_NAME_DECODER.decode(atts.getLocalName(i)));
String value = atts.getValue(i);
if (value != null) {
propertiesNamesValues.put(propertyName, value);
if (JcrLexicon.PRIMARY_TYPE.equals(propertyName) || JcrLexicon.MIXIN_TYPES.equals(propertyName)) {
allTypes.add(value);
}
}
}
Map propertyTypes = new HashMap<>();
for (String typeName : allTypes) {
propertyTypes.putAll(propertyTypesFor(typeName));
}
for (Map.Entry entry : propertiesNamesValues.entrySet()) {
Name propertyName = entry.getKey();
Integer propertyDefinitionType = propertyTypes.get(propertyName);
int propertyType = propertyDefinitionType != null ? propertyDefinitionType : PropertyType.STRING;
current.addPropertyValue(propertyName, entry.getValue(), false, propertyType, DOCUMENT_VIEW_VALUE_DECODER);
}
// Now create the node ...
current.finish();
}
@Override
public void endElement( String uri,
String localName,
String name ) throws SAXException {
current.finish();
current = current.parentHandler();
}
@Override
public void characters( char[] ch,
int start,
int length ) throws SAXException {
String value = new String(ch, start, length);
value = value.trim();
if (value.length() == 0) return;
// Create a 'jcr:xmltext' child node with a single 'jcr:xmlcharacters' property ...
current = nodeHandlerFactory.createFor(JcrLexicon.XMLTEXT, current, uuidBehavior);
current.addPropertyValue(JcrLexicon.PRIMARY_TYPE,
stringFor(JcrNtLexicon.UNSTRUCTURED),
false,
PropertyType.NAME,
DOCUMENT_VIEW_NAME_DECODER);
current.addPropertyValue(JcrLexicon.XMLCHARACTERS, value, false, PropertyType.STRING, null);// don't decode value
current.finish();
// Pop the stack ...
current = current.parentHandler();
}
}
private class ReferenceProperty {
private final Name name;
private final Value[] values;
private final boolean singleValued;
protected ReferenceProperty(Name name, Value value) {
assert name != null;
this.name = name;
assert value != null;
this.values = new Value[] {value};
this.singleValued = true;
}
protected ReferenceProperty( Name name, Value[] values ) {
assert name != null;
this.name = name;
assert values != null && values.length > 0;
this.values = values;
this.singleValued = false;
}
protected int type() {
return value().getType();
}
protected Name name() {
return name;
}
protected boolean isMultiple() {
return !singleValued;
}
protected JcrValue value() {
return (JcrValue)values[0];
}
protected Value[] values() {
return values;
}
}
}
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