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DefaultChainedCodeAssistProcessor.java
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DefaultChainedCodeAssistProcessor.java
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/*******************************************************************************
* Copyright (c) 2012-2016 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.api.editor.codeassist;
import org.eclipse.che.ide.api.editor.texteditor.TextEditor;
import java.util.ArrayList;
import java.util.List;
import java.util.Set;
/**
* Allows to chain code assist processor for the default given content type. It will delegate to sub processors.
*
* @author Florent Benoit
*/
public abstract class DefaultChainedCodeAssistProcessor implements CodeAssistProcessor {
/** Delegate code assist processors. */
private Set<? extends CodeAssistProcessor> codeAssistProcessors;
/**
* Allow to set processors.
*
* @param codeAssistProcessors the expected processors
*/
protected void setProcessors(final Set<? extends CodeAssistProcessor> codeAssistProcessors) {
this.codeAssistProcessors = codeAssistProcessors;
}
@Override
public void computeCompletionProposals(final TextEditor textEditor, final int offset, final boolean triggered, final CodeAssistCallback callback) {
if (!this.codeAssistProcessors.isEmpty()) {
final List<CompletionProposal> proposalList = new ArrayList<>();
final List<CodeAssistProcessor> expected = new ArrayList<>();
for (final CodeAssistProcessor processor : this.codeAssistProcessors) {
expected.add(processor);
processor.computeCompletionProposals(textEditor, offset, triggered, new CodeAssistCallback() {
@Override
public void proposalComputed(final List<CompletionProposal> processorProposals) {
expected.remove(processor);
if (processorProposals == null || processorProposals.isEmpty()) {
return;
}
proposalList.addAll(processorProposals);
// all processors have computed their result
if (expected.isEmpty()) {
callback.proposalComputed(proposalList);
}
}
});
}
}
}
@Override
public String getErrorMessage() {
String errorMessage = null;
if (!this.codeAssistProcessors.isEmpty()) {
for (final CodeAssistProcessor processor : this.codeAssistProcessors) {
final String processorErrorMessage = processor.getErrorMessage();
if (processorErrorMessage != null) {
if (errorMessage == null) {
errorMessage = processorErrorMessage;
} else {
errorMessage = errorMessage.concat(processorErrorMessage);
}
}
}
}
return errorMessage;
}
/**
* Returns the injected processors.
* @return injected processors
*/
public Set<? extends CodeAssistProcessor> getProcessors() {
return this.codeAssistProcessors;
}
}