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/*
* Copyright 2000-2009 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.openapi.application.ex.DecodeDefaultsUtil;
import com.intellij.openapi.components.PathMacroManager;
import com.intellij.openapi.components.StateStorage;
import com.intellij.openapi.components.StateStorageException;
import com.intellij.openapi.util.JDOMUtil;
import com.intellij.util.xmlb.JDOMXIncluder;
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.IOException;
import java.net.URL;
import java.util.Set;
class DefaultsStateStorage implements StateStorage {
private final PathMacroManager myPathMacroManager;
public DefaultsStateStorage(@Nullable final PathMacroManager pathMacroManager) {
myPathMacroManager = pathMacroManager;
}
@Nullable
public Element getState(final Object component, final String componentName) throws StateStorageException {
final URL url = DecodeDefaultsUtil.getDefaults(component, componentName);
if (url == null) return null;
try {
Document document = JDOMUtil.loadDocument(url);
document = JDOMXIncluder.resolve(document, url.toExternalForm());
final Element documentElement = document.getRootElement();
if (myPathMacroManager != null) {
myPathMacroManager.expandPaths(documentElement);
}
return documentElement;
}
catch (IOException e) {
throw new StateStorageException("Error loading state from " + url, e);
}
catch (JDOMException e) {
throw new StateStorageException("Error loading state from " + url, e);
}
}
@Nullable
public <T> T getState(final Object component, final String componentName, final Class<T> stateClass, @Nullable final T mergeInto) throws
StateStorageException {
return DefaultStateSerializer.deserializeState(getState(component, componentName), stateClass, mergeInto);
}
public boolean hasState(final Object component, final String componentName, final Class<?> aClass, final boolean reloadData) throws StateStorageException {
final URL url = DecodeDefaultsUtil.getDefaults(component, componentName);
return url != null;
}
@NotNull
public ExternalizationSession startExternalization() {
throw new UnsupportedOperationException("Method startExternalization not implemented in " + getClass());
}
@NotNull
public SaveSession startSave(@NotNull ExternalizationSession externalizationSession) {
throw new UnsupportedOperationException("Method startSave not implemented in " + getClass());
}
public void finishSave(@NotNull SaveSession saveSession) {
throw new UnsupportedOperationException("Method finishSave not implemented in " + getClass());
}
public void reload(@NotNull final Set<String> changedComponents) throws StateStorageException {
throw new UnsupportedOperationException("Method reload not implemented in " + getClass());
}
}
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