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/*
* Copyright 2000-2012 JetBrains s.r.o.
*
* 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 com.intellij.openapi.components.impl.stores;
import com.intellij.application.options.PathMacrosCollector;
import com.intellij.openapi.components.StateSplitter;
import com.intellij.openapi.components.TrackingPathMacroSubstitutor;
import com.intellij.openapi.diagnostic.Logger;
import com.intellij.openapi.util.JDOMUtil;
import com.intellij.openapi.util.text.StringUtil;
import com.intellij.openapi.vfs.VirtualFile;
import com.intellij.util.PairConsumer;
import com.intellij.util.io.fs.FileSystem;
import com.intellij.util.io.fs.IFile;
import gnu.trove.THashMap;
import org.jdom.Document;
import org.jdom.Element;
import org.jdom.JDOMException;
import org.jetbrains.annotations.NotNull;
import org.jetbrains.annotations.Nullable;
import java.io.File;
import java.io.IOException;
import java.util.*;
public class DirectoryStorageData {
private static final Logger LOG = Logger.getInstance("#com.intellij.openapi.components.impl.stores.DirectoryStorageData");
private Map<String, Map<IFile, Element>> myStates = new HashMap<String, Map<IFile, Element>>();
private long myLastTimestamp = 0;
private DirectoryStorageData myOriginalData;
public Set<String> getComponentNames() {
return myStates.keySet();
}
public void loadFrom(final @Nullable VirtualFile dir, TrackingPathMacroSubstitutor pathMacroSubstitutor) {
if (dir == null || !dir.exists()) {
return;
}
for (VirtualFile file : dir.getChildren()) {
if (!StringUtil.endsWithIgnoreCase(file.getName(), ".xml")) {
//do not load system files like .DS_Store on Mac
continue;
}
try {
final Document document = JDOMUtil.loadDocument(file.contentsToByteArray());
final Element element = document.getRootElement();
if (!element.getName().equals(StorageData.COMPONENT)) {
LOG.error("Incorrect root tag name (" + element.getName() + ") in " + file.getPresentableUrl());
continue;
}
String componentName = element.getAttributeValue(StorageData.NAME);
if (componentName == null) {
LOG.error("Component name isn't specified in " + file.getPresentableUrl());
continue;
}
if (pathMacroSubstitutor != null) {
pathMacroSubstitutor.expandPaths(element);
final Set<String> unknownMacros = PathMacrosCollector.getMacroNames(element);
pathMacroSubstitutor.addUnknownMacros(componentName, unknownMacros);
}
put(componentName, FileSystem.FILE_SYSTEM.createFile(file.getPath()), element, true);
}
catch (IOException e) {
LOG.info("Unable to load state", e);
}
catch (JDOMException e) {
LOG.info("Unable to load state", e);
}
}
}
public void put(final String componentName, final IFile file, final Element element, final boolean updateTimestamp) {
LOG.assertTrue(componentName != null, String.format("Component name should not be null for file: %s", file == null ? "NULL!" : file.getPath()));
Map<IFile, Element> stateMap = myStates.get(componentName);
if (stateMap == null) {
stateMap = new HashMap<IFile, Element>();
myStates.put(componentName, stateMap);
}
stateMap.put(file, element);
if (updateTimestamp) updateLastTimestamp(file);
}
public void updateLastTimestamp(final IFile file) {
myLastTimestamp = Math.max(myLastTimestamp, file.getTimeStamp());
if (myOriginalData != null) myOriginalData.myLastTimestamp = myLastTimestamp;
}
public long getLastTimeStamp() {
return myLastTimestamp;
}
public Map<IFile, Long> getAllStorageFiles() {
final Map<IFile, Long> allStorageFiles = new THashMap<IFile, Long>();
process(new StorageDataProcessor() {
@Override
public void process(final String componentName, final IFile file, final Element element) {
allStorageFiles.put(file, file.getTimeStamp());
}
});
return allStorageFiles;
}
public void processComponent(@NotNull final String componentName, @NotNull final PairConsumer<IFile, Element> consumer) {
final Map<IFile, Element> map = myStates.get(componentName);
if (map != null) {
for (IFile file : map.keySet()) {
consumer.consume(file, map.get(file));
}
}
}
public void process(@NotNull final StorageDataProcessor processor) {
for (final String componentName : myStates.keySet()) {
processComponent(componentName, new PairConsumer<IFile, Element>() {
@Override
public void consume(final IFile iFile, final Element element) {
processor.process(componentName, iFile, element);
}
});
}
}
@Override
protected DirectoryStorageData clone() {
final DirectoryStorageData result = new DirectoryStorageData();
result.myStates = new HashMap<String, Map<IFile, Element>>(myStates);
result.myLastTimestamp = myLastTimestamp;
result.myOriginalData = this;
return result;
}
public void clear() {
myStates.clear();
myOriginalData = null;
}
public boolean containsComponent(final String componentName) {
return myStates.get(componentName) != null;
}
public void removeComponent(final String componentName) {
myStates.remove(componentName);
}
@Nullable
public <T> T getMergedState(String componentName, Class<T> stateClass, StateSplitter splitter, @Nullable T mergeInto) {
final List<Element> subElements = new ArrayList<Element>();
processComponent(componentName, new PairConsumer<IFile, Element>() {
@Override
public void consume(final IFile iFile, final Element element) {
final List children = element.getChildren();
assert children.size() == 1 : JDOMUtil.writeElement(element, File.separator);
final Element subElement = (Element)children.get(0);
subElement.detach();
subElements.add(subElement);
}
});
final Element state = new Element(StorageData.COMPONENT);
splitter.mergeStatesInto(state, subElements.toArray(new Element[subElements.size()]));
removeComponent(componentName);
return DefaultStateSerializer.deserializeState(state, stateClass, mergeInto);
}
interface StorageDataProcessor {
void process(String componentName, IFile file, Element element);
}
}
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