/*
* Copyright 2003-2011 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 jetbrains.mps.ide.findusages.findalgorithm.resultproviders.treenodes;
import jetbrains.mps.ide.findusages.CantLoadSomethingException;
import jetbrains.mps.ide.findusages.CantSaveSomethingException;
import jetbrains.mps.ide.findusages.model.IResultProvider;
import jetbrains.mps.ide.findusages.model.SearchQuery;
import jetbrains.mps.ide.findusages.model.SearchResult;
import jetbrains.mps.ide.findusages.model.SearchResults;
import jetbrains.mps.progress.EmptyProgressMonitor;
import jetbrains.mps.project.Project;
import org.apache.log4j.LogManager;
import org.apache.log4j.Logger;
import org.jdom.Element;
import org.jetbrains.annotations.NotNull;
import org.jetbrains.annotations.Nullable;
import org.jetbrains.mps.openapi.module.SearchScope;
import org.jetbrains.mps.openapi.util.ProgressMonitor;
import java.util.ArrayList;
import java.util.Collections;
import java.util.List;
/**
* NOTE: all nodes except UnionNode MUST have <2 children
*/
public abstract class BaseNode implements IResultProvider {
private static final Logger LOG = LogManager.getLogger(BaseNode.class);
private static final String CHILDREN = "children";
protected BaseNode myParent;
protected List<BaseNode> myChildren = new ArrayList<BaseNode>();
public BaseNode() {
}
//----TREE STUFF----
public BaseNode getParent() {
return myParent;
}
public void setParent(BaseNode parent) {
myParent = parent;
}
public void addChild(BaseNode child) {
myChildren.add(child);
child.setParent(this);
}
public void removeChild(BaseNode child) {
assert child.getParent() == this;
myChildren.remove(child);
child.setParent(null);
}
public void clearChildren() {
myChildren.clear();
}
public List<BaseNode> getChildren() {
return Collections.unmodifiableList(myChildren);
}
public boolean isRoot() {
return myParent == null;
}
//----SEARCH STUFF----
@Override
public SearchResults getResults(SearchQuery query, @Nullable ProgressMonitor monitor) {
// assert !ThreadUtils.isEventDispatchThread();
if (monitor == null) monitor = new EmptyProgressMonitor();
SearchResults results = doGetResults(query, monitor);
//no null pointer exception will occur!!
if (results.getSearchedNodes().contains(null)) {
LOG.error("GetResults returned nodes containing null, which means that some of your filters and finders is incorrect");
results.getSearchedNodes().remove(null);
}
boolean error = false;
for (SearchResult result : (List<SearchResult>) results.getSearchResults()) {
if (result.getObject() == null) {
LOG.error("GetResults returned results containing null, which means that some of your filters and finders is incorrect");
error = true;
}
}
if (error) {
List<SearchResult> newResults = new ArrayList<SearchResult>();
for (SearchResult result : (List<SearchResult>) results.getSearchResults()) {
if (result.getObject() != null) {
newResults.add(result);
}
}
results = new SearchResults(results.getSearchedNodes(), newResults);
}
return results;
}
public abstract SearchResults doGetResults(SearchQuery query, @NotNull ProgressMonitor monitor);
@Override
public long getEstimatedTime(SearchScope scope) {
long sumTime = 0;
for (BaseNode child : myChildren) {
sumTime = sumTime + child.getEstimatedTime(scope);
}
return sumTime;
}
//----SAVE/LOAD STUFF----
@Override
public void write(Element element, Project project) throws CantSaveSomethingException {
Element childrenXML = new Element(CHILDREN);
for (BaseNode child : myChildren) {
Element childXML = new Element(child.getClass().getName());
child.write(childXML, project);
childrenXML.addContent(childXML);
}
element.addContent(childrenXML);
}
@Override
public void read(Element element, Project project) throws CantLoadSomethingException {
Element childrenXML = element.getChild(CHILDREN);
for (Element childXML : (List<Element>) childrenXML.getChildren()) {
try {
BaseNode child = (BaseNode) Class.forName(childXML.getName()).newInstance();
child.read(childXML, project);
myChildren.add(child);
child.setParent(this);
} catch (Throwable t) {
throw new CantLoadSomethingException("Error while instantiating node: " + t.getMessage(), t);
}
}
}
}