/*******************************************************************************
* Copyright (c) 2012-2017 Codenvy, S.A.
* All rights reserved. This program and the accompanying materials
* are made available under the terms of the Eclipse Public License v1.0
* which accompanies this distribution, and is available at
* http://www.eclipse.org/legal/epl-v10.html
*
* Contributors:
* Codenvy, S.A. - initial API and implementation
*******************************************************************************/
package org.eclipse.che.ide.ext.java.client.tree;
import com.google.common.annotations.Beta;
import com.google.gwt.core.client.JsArrayMixed;
import com.google.inject.Inject;
import com.google.inject.Singleton;
import org.eclipse.che.api.promises.client.Function;
import org.eclipse.che.api.promises.client.FunctionException;
import org.eclipse.che.api.promises.client.Operation;
import org.eclipse.che.api.promises.client.OperationException;
import org.eclipse.che.api.promises.client.Promise;
import org.eclipse.che.api.promises.client.PromiseError;
import org.eclipse.che.api.promises.client.PromiseProvider;
import org.eclipse.che.ide.api.data.tree.Node;
import org.eclipse.che.ide.api.data.tree.NodeInterceptor;
import org.eclipse.che.ide.api.data.tree.settings.SettingsProvider;
import org.eclipse.che.ide.api.resources.Container;
import org.eclipse.che.ide.api.resources.Resource;
import org.eclipse.che.ide.ext.java.client.resource.SourceFolderMarker;
import org.eclipse.che.ide.resources.tree.ContainerNode;
import org.eclipse.che.ide.resources.tree.ResourceNode;
import java.util.Arrays;
import java.util.List;
import static java.util.Collections.singletonList;
import static org.eclipse.che.ide.api.resources.Resource.FILE;
/**
* @author Vlad Zhukovskiy
*/
@Beta
@Singleton
public class JavaPackageConnector implements NodeInterceptor {
private PromiseProvider promises;
private final JavaNodeFactory nodeFactory;
private final SettingsProvider settingsProvider;
@Inject
public JavaPackageConnector(PromiseProvider promises,
JavaNodeFactory nodeFactory,
SettingsProvider settingsProvider) {
this.promises = promises;
this.nodeFactory = nodeFactory;
this.settingsProvider = settingsProvider;
}
@Override
public Promise<List<Node>> intercept(Node parent, List<Node> children) {
if (parent instanceof ResourceNode) {
return transform((ResourceNode)parent, children);
} else {
return promises.resolve(children);
}
}
@Override
public int getPriority() {
return NORM_PRIORITY;
}
protected Promise<List<Node>> transform(ResourceNode parent, final List<Node> children) {
if (!isSourceOrPackage(parent)) {
return promises.resolve(children);
}
if (children.size() == 1) {
final Node node = children.get(0);
if (node instanceof ContainerNode) {
return getNonEmptyPackage(((ContainerNode)node).getData()).then(new Function<Container, List<Node>>() {
@Override
public List<Node> apply(Container pkg) throws FunctionException {
final Node packageNode = nodeFactory.newPackage(pkg, settingsProvider.getSettings());
return singletonList(packageNode);
}
});
} else {
return promises.resolve(children);
}
} else if (children.size() > 1) {
final Node[] nodes = new Node[children.size()];
Promise[] pkgPromises = new Promise[0];
for (int i = 0; i < children.size(); i++) {
final Node node = children.get(i);
final int index = i;
if (node instanceof ContainerNode) {
int pkgIndex = pkgPromises.length;
pkgPromises = Arrays.copyOf(pkgPromises, pkgIndex + 1);
pkgPromises[pkgIndex] = getNonEmptyPackage(((ContainerNode)node).getData()).then(new Operation<Container>() {
@Override
public void apply(Container pkg) throws OperationException {
nodes[index] = nodeFactory.newPackage(pkg, settingsProvider.getSettings());
}
});
} else {
nodes[index] = node;
}
}
return promises.all(pkgPromises).then(new Function<JsArrayMixed, List<Node>>() {
@Override
public List<Node> apply(JsArrayMixed ignored) throws FunctionException {
return Arrays.asList(nodes);
}
});
}
return promises.resolve(children);
}
protected boolean isSourceOrPackage(ResourceNode node) {
return node.getData().getParentWithMarker(SourceFolderMarker.ID).isPresent();
}
protected Promise<Container> getNonEmptyPackage(final Container source) {
return source.getChildren().thenPromise(new Function<Resource[], Promise<Container>>() {
@Override
public Promise<Container> apply(Resource[] children) throws FunctionException {
if (children == null || children.length == 0 || children.length > 1) {
return promises.resolve(source);
} else {
final Resource resource = children[0];
if (resource.getResourceType() == FILE) {
return promises.resolve(source);
} else {
return getNonEmptyPackage((Container)resource);
}
}
}
}).catchErrorPromise(new Function<PromiseError, Promise<Container>>() {
@Override
public Promise<Container> apply(PromiseError arg) throws FunctionException {
return promises.resolve(source);
}
});
}
}