/*
* 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.File;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.IOException;
import java.io.InputStream;
import java.util.ArrayList;
import java.util.Collection;
import java.util.LinkedHashMap;
import java.util.List;
import javax.jcr.Node;
import javax.jcr.RepositoryException;
import javax.jcr.Value;
import org.modeshape.common.collection.Multimap;
import org.modeshape.common.logging.Logger;
import org.modeshape.common.util.IoUtil;
import org.modeshape.common.util.StringUtil;
import org.modeshape.jcr.cache.RepositoryCache;
import org.modeshape.jcr.cache.document.WorkspaceCache;
import org.modeshape.jcr.value.Path;
import org.modeshape.jcr.value.PropertyType;
import org.modeshape.jcr.xml.NodeImportDestination;
import org.modeshape.jcr.xml.NodeImportXmlHandler;
import org.xml.sax.InputSource;
import org.xml.sax.SAXException;
import org.xml.sax.XMLReader;
import org.xml.sax.helpers.XMLReaderFactory;
/**
* Class which handles the import of initial content files for new workspaces, using a {@link NodeImportXmlHandler}. It is
* important that any new content is imported through the "JCR layer", so that the JCR specific validations are performed.
*
* @author Horia Chiorean (hchiorea@redhat.com)
*/
public final class InitialContentImporter {
private static final Logger LOGGER = Logger.getLogger(InitialContentImporter.class);
private final JcrRepository.RunningState repository;
private final RepositoryConfiguration.InitialContent initialContentConfig;
InitialContentImporter( RepositoryConfiguration.InitialContent initialContentConfig,
JcrRepository.RunningState repository ) {
this.initialContentConfig = initialContentConfig;
this.repository = repository;
}
protected void importInitialContent( String workspaceName ) throws RepositoryException {
// check that there is something which should be imported
if (!initialContentConfig.hasInitialContentFile(workspaceName)) {
return;
}
RepositoryCache repositoryCache = repository.repositoryCache();
WorkspaceCache wsCache = repositoryCache.getWorkspaceCache(workspaceName);
if (!wsCache.isEmpty()) {
// the ws cache must be empty for initial content to be imported
LOGGER.debug("Skipping import of initial content into workspace {0} as it is not empty", workspaceName);
return;
}
InputStream stream = getInitialContentFileStream(workspaceName);
if (stream == null) {
return;
}
doImport(workspaceName, stream);
}
private void doImport( String workspaceName,
InputStream initialContentFileStream ) throws RepositoryException {
JcrSession internalSession = repository.loginInternalSession(workspaceName);
ImportDestination importDestination = new ImportDestination(internalSession);
NodeImportXmlHandler handler = new NodeImportXmlHandler(importDestination);
try {
XMLReader reader = XMLReaderFactory.createXMLReader();
reader.setContentHandler(handler);
reader.setErrorHandler(handler);
reader.parse(new InputSource(initialContentFileStream));
internalSession.save();
} catch (SAXException e) {
if (e.getCause() instanceof RepositoryException) {
throw (RepositoryException)e.getCause();
}
throw new RepositoryException(JcrI18n.errorWhileParsingInitialContentFile.text(e.getMessage()), e);
} catch (IOException e) {
throw new RepositoryException(JcrI18n.errorWhileReadingInitialContentFile.text(e.getMessage()), e);
} finally {
try {
initialContentFileStream.close();
} catch (IOException e) {
LOGGER.debug("Cannot close initial content file initialContentFileStream", e);
}
internalSession.logout();
}
}
private InputStream getInitialContentFileStream( String workspaceName ) {
String initialContentFileString = initialContentConfig.getInitialContentFile(workspaceName);
InputStream stream = IoUtil.getResourceAsStream(initialContentFileString,
repository.environment()
.getClassLoader(InitialContentImporter.class.getClassLoader()),
null);
if (stream == null) {
repository.warn(JcrI18n.cannotLoadInitialContentFile, initialContentFileString);
}
return stream;
}
private class ImportDestination implements NodeImportDestination {
private final JcrSession session;
protected ImportDestination( JcrSession session ) {
this.session = session;
}
@Override
public ExecutionContext getExecutionContext() {
return session.context();
}
@SuppressWarnings( "synthetic-access" )
@Override
public void submit( LinkedHashMap<Path, NodeImportXmlHandler.ImportElement> parseResults ) throws RepositoryException {
List<NodeImportXmlHandler.ImportElement> elementsWithReferences = new ArrayList<>();
JcrValueFactory valueFactory = session.getValueFactory();
for (Path nodePath : parseResults.keySet()) {
LOGGER.debug("Importing node at path {0}", nodePath);
NodeImportXmlHandler.ImportElement element = parseResults.get(nodePath);
Path parentPath = nodePath.getParent();
AbstractJcrNode parentNode = session.node(parentPath);
// create the new node
AbstractJcrNode newNode = null;
// make sure the path is not encoded, because that's how the node xml handler generates it
String newNodeRelativePath = nodePath.getLastSegment().getName().toString();
if (StringUtil.isBlank(element.getType())) {
newNode = parentNode.addNode(newNodeRelativePath);
} else {
newNode = parentNode.addNode(newNodeRelativePath, element.getType());
}
// add any mixins
for (String mixin : element.getMixins()) {
newNode.addMixin(mixin);
}
// set the properties
for (String propertyName : element.getProperties().keySet()) {
org.modeshape.jcr.value.PropertyType propertyType = element.getPropertyType(propertyName);
if (isReference(propertyType)) {
elementsWithReferences.add(element);
// references will be processed later
continue;
}
Collection<String> propertyValues = element.getProperties().get(propertyName);
if (propertyValues.size() == 1) {
String stringValue = propertyValues.iterator().next();
if (isBinary(propertyType)) {
// we have a binary prop, try to resolve its stream
InputStream inputStream = readBinaryStream(stringValue);
if (inputStream != null) {
newNode.setProperty(propertyName, inputStream);
continue;
}
// we were unable to read its stream, to we'll set the binary value UTF-8 bytes (default behavior)
}
newNode.setProperty(propertyName, stringValue, propertyType.jcrType());
} else {
String[] stringValues = propertyValues.toArray(new String[propertyValues.size()]);
if (isBinary(propertyType)) {
// try to parse each individual binary value and read its stream
boolean allValuesRead = true;
Value[] binaryValues = new Value[propertyValues.size()];
for (int i = 0; i < stringValues.length; i++) {
String stringValue = stringValues[i];
InputStream inputStream = readBinaryStream(stringValue);
if (inputStream == null) {
// we were unable to read the stream, so we abort this approach altogether and we'll
// set the binary value using the string bytes
allValuesRead = false;
break;
}
binaryValues[i] = valueFactory.createValue(inputStream);
}
if (allValuesRead) {
newNode.setProperty(propertyName, binaryValues);
// we managed to set the binary multi value streams, so move onto the next property
continue;
}
}
newNode.setProperty(propertyName, stringValues, propertyType.jcrType());
}
}
}
if (!elementsWithReferences.isEmpty()) {
// after we've processed all the nodes (and created them) set the reference properties
setReferenceProperties(elementsWithReferences);
}
}
private boolean isReference( org.modeshape.jcr.value.PropertyType propertyType ) {
return org.modeshape.jcr.value.PropertyType.REFERENCE == propertyType
|| org.modeshape.jcr.value.PropertyType.WEAKREFERENCE == propertyType
|| org.modeshape.jcr.value.PropertyType.SIMPLEREFERENCE == propertyType;
}
private boolean isBinary( org.modeshape.jcr.value.PropertyType propertyType ) {
return PropertyType.BINARY == propertyType;
}
private InputStream readBinaryStream( String resourcePath ) {
// attempt to resolve the resource as the path to a file
File file = new File(resourcePath);
if (file.exists() && file.canRead()) {
try {
return new FileInputStream(file);
} catch (FileNotFoundException e) {
// we cannot locate/read the file
}
}
// try resolving it via the classpath
return InitialContentImporter.class.getClassLoader().getResourceAsStream(resourcePath);
}
private void setReferenceProperties( List<NodeImportXmlHandler.ImportElement> elementsWithReferences )
throws RepositoryException {
for (NodeImportXmlHandler.ImportElement element : elementsWithReferences) {
Node node = session.node(element.getPath());
Multimap<String, String> properties = element.getProperties();
for (String propertyName : properties.keySet()) {
org.modeshape.jcr.value.PropertyType propertyType = element.getPropertyType(propertyName);
if (!isReference(propertyType)) {
continue;
}
setReferenceProperty(node, propertyName, properties.get(propertyName), propertyType);
}
}
}
private void setReferenceProperty( Node node,
String propertyName,
Collection<String> values,
org.modeshape.jcr.value.PropertyType referenceType ) throws RepositoryException {
List<Value> referenceValues = new ArrayList<>();
for (String absPath : values) {
AbstractJcrNode referredNode = session.getNode(absPath);
Value reference = null;
switch (referenceType) {
case REFERENCE: {
reference = session.getValueFactory().createValue(referredNode, false);
break;
}
case WEAKREFERENCE: {
reference = session.getValueFactory().createValue(referredNode, true);
break;
}
case SIMPLEREFERENCE: {
reference = session.getValueFactory().createSimpleReference(referredNode);
break;
}
default: {
throw new IllegalArgumentException("Invalid reference type:" + referenceType);
}
}
referenceValues.add(reference);
}
if (referenceValues.size() == 1) {
node.setProperty(propertyName, referenceValues.get(0));
} else {
node.setProperty(propertyName, referenceValues.toArray(new Value[referenceValues.size()]));
}
}
}
}