MethodFinder.java

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 * License Version 1.0 (the "License"); you may not use this file
 * except in compliance with the License. You may obtain a copy of
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 *
 * Software distributed under the License is distributed on an "AS
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 * Copyright (C) 2006 Mirko Stocker <me@misto.ch>
 * 
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package org.rubypeople.rdt.refactoring.core.inlinemethod;

import java.util.List;

import org.eclipse.core.runtime.CoreException;
import org.eclipse.core.runtime.NullProgressMonitor;
import org.jruby.ast.MethodDefNode;
import org.jruby.ast.Node;
import org.rubypeople.rdt.core.IMethod;
import org.rubypeople.rdt.core.IRubyElement;
import org.rubypeople.rdt.core.search.CollectingSearchRequestor;
import org.rubypeople.rdt.core.search.IRubySearchConstants;
import org.rubypeople.rdt.core.search.IRubySearchScope;
import org.rubypeople.rdt.core.search.SearchEngine;
import org.rubypeople.rdt.core.search.SearchMatch;
import org.rubypeople.rdt.core.search.SearchParticipant;
import org.rubypeople.rdt.core.search.SearchPattern;
import org.rubypeople.rdt.internal.ti.util.OffsetNodeLocator;
import org.rubypeople.rdt.internal.ui.RubyPlugin;
import org.rubypeople.rdt.internal.ui.rubyeditor.ASTProvider;
import org.rubypeople.rdt.refactoring.classnodeprovider.IncludedClassesProvider;
import org.rubypeople.rdt.refactoring.documentprovider.IDocumentProvider;
import org.rubypeople.rdt.refactoring.nodewrapper.MethodNodeWrapper;

public class MethodFinder implements IMethodFinder {

	public MethodDefNode find(String className, String methodName, IDocumentProvider doc) {
		SearchEngine engine = new SearchEngine();
		SearchPattern pattern = SearchPattern.createPattern(IRubyElement.METHOD, className + '.' + methodName, IRubySearchConstants.DECLARATIONS, SearchPattern.R_EXACT_MATCH);
		SearchParticipant[] participants = {SearchEngine.getDefaultSearchParticipant()};
		IRubySearchScope scope = SearchEngine.createWorkspaceScope(); // FIXME Create scope from doc provider?
		CollectingSearchRequestor requestor = new CollectingSearchRequestor();
		try {
			engine.search(pattern, participants, scope, requestor, new NullProgressMonitor());
			List<SearchMatch> matches = requestor.getResults();
			for (SearchMatch match : matches) {
				IRubyElement element = (IRubyElement) match.getElement();
				if (element.isType(IRubyElement.METHOD)) {
					IMethod method = (IMethod) element;
					Node rootNode = ASTProvider.getASTProvider().getAST(method.getRubyScript(), ASTProvider.WAIT_YES, new NullProgressMonitor());
					Node node = OffsetNodeLocator.Instance().getNodeAtOffset(rootNode, method.getSourceRange().getOffset());
					if (node instanceof MethodDefNode) {
						return (MethodDefNode) node;
					}
				}
			}
			
		} catch (CoreException e) {
			RubyPlugin.log(e);
		}
		
		for(MethodNodeWrapper method : new IncludedClassesProvider(doc).getAllMethodsFor(className)) {
			if(method.getName().equals(methodName)) {
				return method.getWrappedNode();
			}
		}
		
		return null;
	}
}