PropertyResolver.java

/*
 * Copyright 2000-2010 JetBrains s.r.o.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 * http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package org.napile.idea.thermit.dom;

import java.util.Collection;
import java.util.Collections;
import java.util.HashSet;
import java.util.Iterator;
import java.util.Set;

import org.jetbrains.annotations.NotNull;
import com.intellij.openapi.util.Trinity;
import com.intellij.psi.PsiElement;
import com.intellij.util.xml.DomElement;

/**
 * @author Eugene Zhuravlev
 *         Date: Apr 22, 2010
 */
public class PropertyResolver extends PropertyProviderFinder
{
	private final String myPropertyName;
	private PropertiesProvider myResult;
	private Set<String> myVariants = new HashSet<String>();

	private PropertyResolver(@NotNull String propertyName, DomElement contextElement)
	{
		super(contextElement);
		myPropertyName = propertyName;
	}

	public void visitAntDomAntCallParam(AntDomAntCallParam antCallParam)
	{
		// deliberately skip ancall params, they will be processed as a special case
	}

	@NotNull
	public static Trinity<PsiElement, Collection<String>, PropertiesProvider> resolve(@NotNull AntDomProject project, @NotNull String propertyName, DomElement contextElement)
	{
		final PropertyResolver resolver = new PropertyResolver(propertyName, contextElement);
		resolver.execute(project, project.getDefaultTarget().getRawText());
		if(resolver.getContextElement() instanceof PropertiesProvider)
		{
			// special case - when context element is a property provider itself
			resolver.propertyProviderFound((PropertiesProvider) resolver.getContextElement());
		}
		return resolver.getResult();

	}

	@NotNull
	public Trinity<PsiElement, Collection<String>, PropertiesProvider> getResult()
	{
		final PsiElement element = myResult != null ? myResult.getNavigationElement(myPropertyName) : null;
		return new Trinity<PsiElement, Collection<String>, PropertiesProvider>(element, Collections.unmodifiableSet(myVariants), myResult);
	}

	@Override
	protected void propertyProviderFound(PropertiesProvider propertiesProvider)
	{
		boolean found = false;
		for(Iterator<String> it = propertiesProvider.getNamesIterator(); it.hasNext(); )
		{
			final String providerProperty = it.next();
			myVariants.add(providerProperty);
			if(myPropertyName.equals(providerProperty))
			{
				found = true;
			}
		}
		if(found)
		{
			myResult = propertiesProvider;
			stop();
		}
	}
}