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/*******************************************************************************
* Copyright (c) 2006 IBM Corporation and others.
* 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:
* IBM Corporation - initial API and implementation
* yyyymmdd bug Email and other contact information
* -------- -------- -----------------------------------------------------------
* 20060131 121071 rsinha@ca.ibm.com - Rupam Kuehner (creation)
* 20060427 126780 rsinha@ca.ibm.com - Rupam Kuehner
*******************************************************************************/
package org.eclipse.jst.ws.internal.consumption.common;
import java.util.ArrayList;
import java.util.Hashtable;
import java.util.Iterator;
import java.util.List;
import java.util.Set;
import org.eclipse.core.runtime.CoreException;
import org.eclipse.wst.common.project.facet.core.IFacetedProjectTemplate;
import org.eclipse.wst.common.project.facet.core.IProjectFacet;
import org.eclipse.wst.common.project.facet.core.IProjectFacetVersion;
import org.eclipse.wst.common.project.facet.core.ProjectFacetsManager;
import org.eclipse.wst.common.project.facet.core.VersionFormatException;
/**
* FacetSetsByTemplateCache caches the sets of facet version combinations for templates.
*/
public class FacetSetsByTemplateCache
{
// single instance per workbench
private static FacetSetsByTemplateCache instance_;
//facetSetsByTemplateId_:
//key: Object of type String. String id of an IFacetedProjectTemplate.
//value: Object of Set[]. An array of Sets where each set contains elements of type IProjectFacetVersion.
private Hashtable facetSetsByTemplateId_;
/**
* Returns a singleton instance of this class.
*
* @return A singleton FacetSetsByTemplateCache object.
*/
public static synchronized FacetSetsByTemplateCache getInstance()
{
if (instance_ == null)
{
instance_ = new FacetSetsByTemplateCache();
instance_.load();
}
return instance_;
}
private void load()
{
facetSetsByTemplateId_ = new Hashtable();
}
/**
* Returns all the valid facet version combinations that can be derived from the fixed facets
* of the given template. For example, if the template has two fixed facets, A and B,
* and A has versions 1.0 and 2.0, B has versions 1.1, 2.1,
* the following array of Sets will be returned (assuming for the sake of the example
* that all the combinations are valid):<br/>
* {Set1, Set2, Set3, Set4}, where<br/>
* Set1 = [A1.0, B1.1]<br/>
* Set2 = [A2.0, B1.1]<br/>
* Set3 = [A1.0, B2.1]<br/>
* Set4 = [A2.0, B2.1]<br/>
* <br/>
* @param templateId id of an {@link IFacetedProjectTemplate}
* @return Set[] An array of Sets where each set contains elements of type {@link IProjectFacetVersion}.
*/
public synchronized Set[] getFacetVersionCombinationsFromTemplate(String templateId)
{
//Return the cached combinations if present.
Set[] cachedCombinations = (Set[])facetSetsByTemplateId_.get(templateId);
if (cachedCombinations != null)
{
return cachedCombinations;
}
else
{
//Combinations have not yet been cached for the given template.
//Determine the combinations and cache them.
IFacetedProjectTemplate template = ProjectFacetsManager.getTemplate(templateId);
Set fixedFacets = template.getFixedProjectFacets();
//Create an array of arrays. Each element of the array will contain the array
//of IProjectFacetVersions for each IProjectFacet in the set of fixed facets.
Iterator itr = fixedFacets.iterator();
ArrayList projectFacetVersionArrays = new ArrayList();
while (itr.hasNext())
{
IProjectFacet facet = (IProjectFacet) itr.next();
List versions = null;
try
{
// Get the facet versions in ascending order.
versions = facet.getSortedVersions(true);
} catch (VersionFormatException e) {
Set versionSet = facet.getVersions();
Iterator versionSetItr = versionSet.iterator();
versions = new ArrayList();
while (versionSetItr.hasNext())
{
versions.add(itr.next());
}
} catch (CoreException e) {
Set versionSet = facet.getVersions();
Iterator versionSetItr = versionSet.iterator();
versions = new ArrayList();
while (versionSetItr.hasNext())
{
versions.add(itr.next());
}
}
if (versions.size() > 0)
{
//Create an array of IProjectFacetVersions from versions.
Iterator versionItr = versions.iterator();
ArrayList arrayOfVersionsList = new ArrayList();
while (versionItr.hasNext())
{
IProjectFacetVersion pfv = (IProjectFacetVersion)versionItr.next();
arrayOfVersionsList.add(pfv);
}
//Add the array of versions to the list of arrays.
projectFacetVersionArrays.add((IProjectFacetVersion[])arrayOfVersionsList.toArray(new IProjectFacetVersion[0]));
}
}
IProjectFacetVersion[][] arrayOfProjectFacetVersionArrays = (IProjectFacetVersion[][])projectFacetVersionArrays.toArray(new IProjectFacetVersion[0][0]);
Set[] allValidCombinationsArray = FacetUtils.getFacetCombinations(arrayOfProjectFacetVersionArrays, true);
facetSetsByTemplateId_.put(templateId, allValidCombinationsArray);
return allValidCombinationsArray;
}
}
}
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