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| package net.sourceforge.pmd.util.viewer.model; |
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| import net.sourceforge.pmd.TargetJDK1_4; |
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| import net.sourceforge.pmd.ast.ASTCompilationUnit; |
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| import net.sourceforge.pmd.ast.ParseException; |
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| import net.sourceforge.pmd.ast.SimpleNode; |
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| import net.sourceforge.pmd.jaxen.DocumentNavigator; |
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| import org.jaxen.BaseXPath; |
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| import org.jaxen.JaxenException; |
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| import org.jaxen.XPath; |
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| import java.io.StringReader; |
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| import java.util.List; |
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| import java.util.Vector; |
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| public class ViewerModel { |
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| private Vector listeners; |
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| private SimpleNode rootNode; |
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| private List evaluationResults; |
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| public ViewerModel() {
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| listeners = new Vector(5);
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| } |
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| public SimpleNode getRootNode() {
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| return rootNode;
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| } |
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| public void commitSource(String source) {
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| ASTCompilationUnit compilationUnit = new TargetJDK1_4().createParser(new StringReader(source)).CompilationUnit();
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| rootNode = compilationUnit;
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| fireViewerModelEvent(new ViewerModelEvent(this, ViewerModelEvent.CODE_RECOMPILED));
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| } |
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| public boolean hasCompiledTree() {
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| return rootNode != null;
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| } |
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| public void evaluateXPathExpression(String xPath, Object evaluator)
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| throws ParseException, JaxenException { |
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| XPath xpath = new BaseXPath(xPath, new DocumentNavigator());
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| evaluationResults = xpath.selectNodes(rootNode);
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| fireViewerModelEvent(new ViewerModelEvent(evaluator, ViewerModelEvent.PATH_EXPRESSION_EVALUATED));
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| } |
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| public List getLastEvaluationResults() {
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| return evaluationResults;
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| } |
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| public void selectNode(SimpleNode node, Object selector) {
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| fireViewerModelEvent(new ViewerModelEvent(selector, ViewerModelEvent.NODE_SELECTED, node));
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| } |
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| public void appendToXPathExpression(String pathFragment, Object appender) {
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| fireViewerModelEvent(new ViewerModelEvent(appender, ViewerModelEvent.PATH_EXPRESSION_APPENDED, pathFragment));
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| } |
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| public void addViewerModelListener(ViewerModelListener l) {
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| listeners.add(l);
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| } |
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| public void removeViewerModelListener(ViewerModelListener l) {
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| listeners.remove(l);
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| } |
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| protected void fireViewerModelEvent(ViewerModelEvent e) {
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| for (int i = 0; i < listeners.size(); i++) {
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| ((ViewerModelListener) listeners.elementAt(i)).viewerModelChanged(e);
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| } |
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| } |
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| } |