/*******************************************************************************
* Copyright (c) 2005, 2009 Spring IDE Developers
* 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:
* Spring IDE Developers - initial API and implementation
*******************************************************************************/
package org.springframework.ide.eclipse.batch.ui.editor.contentassist.batch;
import org.eclipse.core.resources.IFile;
import org.eclipse.swt.graphics.Image;
import org.springframework.ide.eclipse.batch.BatchUIImages;
import org.springframework.ide.eclipse.beans.ui.editor.contentassist.IContentAssistCalculator;
import org.springframework.ide.eclipse.beans.ui.editor.contentassist.IContentAssistContext;
import org.springframework.ide.eclipse.beans.ui.editor.contentassist.IContentAssistProposalRecorder;
import org.w3c.dom.NamedNodeMap;
import org.w3c.dom.Node;
import org.w3c.dom.NodeList;
/**
* {@link IContentAssistCalculator} implementation that can be used to locate references to
* <code>step<step> elements.
* @author Leo Dos Santos
* @since 2.2.5
*/
public class StepReferenceContentAssistCalculator implements IContentAssistCalculator {
private static final int RELEVANCE = 20;
public void computeProposals(IContentAssistContext context,
IContentAssistProposalRecorder recorder) {
String prefix = context.getMatchString();
if (prefix == null) {
prefix = "";
}
IFile file = context.getFile();
if (context.getDocument() != null) {
searchStepElements(recorder, prefix, context.getParentNode(), file);
if (context.getNode() != null && ("next".equals(context.getNode().getNodeName())
|| "stop".equals(context.getNode().getNodeName()))) {
searchStepElements(recorder, prefix, context.getParentNode().getParentNode(), file);
}
}
}
private void searchStepElements(IContentAssistProposalRecorder recorder, String prefix,
Node node, IFile file) {
NodeList children = node.getChildNodes();
for (int i = 0; i < children.getLength(); i++) {
Node child = children.item(i);
if ("step".equals(child.getLocalName()) || "decision".equals(child.getLocalName())
|| "split".equals(child.getLocalName())) {
NamedNodeMap attributes = child.getAttributes();
Node id = attributes.getNamedItem("id");
if (id != null && id.getNodeValue() != null && id.getNodeValue().startsWith(prefix)) {
acceptStepMatch(recorder, child, file);
}
}
}
}
private void acceptStepMatch(IContentAssistProposalRecorder recorder, Node stepNode, IFile file) {
NamedNodeMap attrs = stepNode.getAttributes();
Node id = attrs.getNamedItem("id");
Node parentNode = stepNode.getParentNode();
String stepName = id.getNodeValue();
String replaceText = stepName;
String fileName = file.getProjectRelativePath().toString();
StringBuilder buf = new StringBuilder();
buf.append(stepName);
if (parentNode != null) {
buf.append(" [");
buf.append(parentNode.getNodeName());
buf.append("]");
}
if (fileName != null) {
buf.append(" - ");
buf.append(fileName);
}
String displayText = buf.toString();
Image image = BatchUIImages.getImage(BatchUIImages.IMG_OBJS_BATCH);
recorder.recordProposal(image, RELEVANCE, displayText, replaceText, stepName);
}
}
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