/*
 *  Licensed to the Apache Software Foundation (ASF) under one or more
 *  contributor license agreements.  See the NOTICE file distributed with
 *  this work for additional information regarding copyright ownership.
 *  The ASF licenses this file to You 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.apache.ivy.core.sort;

import java.util.ArrayList;
import java.util.Collection;
import java.util.HashMap;
import java.util.Iterator;
import java.util.LinkedList;
import java.util.List;
import java.util.Map;

import org.apache.ivy.core.module.descriptor.DependencyDescriptor;
import org.apache.ivy.core.module.descriptor.ModuleDescriptor;
import org.apache.ivy.core.module.id.ModuleId;
import org.apache.ivy.plugins.version.VersionMatcher;

/**
 * Wrap a collection of descriptores wrapped themself in ModuleInSort elements.  It contains some
 * dedicated function to retrieve module descriptors based on dependencies descriptors.<br>
 * <i>This class is designed to be used internally by the ModuleDescriptorSorter.</i>
 */
class CollectionOfModulesToSort implements Iterable {

	private final List moduleDescriptors;	//List<ModuleInSort>
	private final VersionMatcher versionMatcher;
	private final Map modulesByModuleId;	//Map<ModuleId , Collection<ModuleInSort>
	private final NonMatchingVersionReporter nonMatchingVersionReporter;
	
	/**
	 * @param modulesToSort The collection of ModuleDescriptor to sort 
	 * @param matcher The matcher to used to check if dependencyDescriptor match a module in this collection
	 * @param nonMatchingVersionReporter 
	 */
	public CollectionOfModulesToSort(Collection modulesToSort, VersionMatcher matcher, NonMatchingVersionReporter nonMatchingVersionReporter) {
		this.versionMatcher = matcher;
		this.nonMatchingVersionReporter = nonMatchingVersionReporter;
		this.modulesByModuleId = new HashMap();
		moduleDescriptors = new ArrayList(modulesToSort.size());
		for (Iterator it = modulesToSort.iterator(); it.hasNext();) {
			ModuleDescriptor md = (ModuleDescriptor) it.next();
			ModuleInSort mdInSort = new ModuleInSort(md);
			moduleDescriptors.add(mdInSort);
			addToModulesByModuleId(md, mdInSort);
		}
	}


	private void addToModulesByModuleId(ModuleDescriptor md, ModuleInSort mdInSort) {
		ModuleId mdId = md.getModuleRevisionId().getModuleId(); 
		List mdInSortAsList = new LinkedList();
		mdInSortAsList.add(mdInSort);
		List previousList = (List) modulesByModuleId.put(mdId, mdInSortAsList);
		if (previousList!=null) {
			mdInSortAsList.addAll(previousList);
		}
	}
	
	
	public Iterator iterator() {
		return moduleDescriptors.iterator();
	}


	public int size() {
		return moduleDescriptors.size();
	}
	
	
	/**
	 * Find a matching module descriptor in the list of module to sort.
     * @param descriptor
     * @return a ModuleDescriptor from the collection of module descriptors to sort.
     * If none exists returns null.
     */
    public ModuleInSort getModuleDescriptorDependency(DependencyDescriptor descriptor) {
    	Collection modulesOfSameId = (Collection) modulesByModuleId.get(descriptor.getDependencyId());
    	if (modulesOfSameId==null) return null;
    	for (Iterator it = modulesOfSameId.iterator(); it.hasNext();) {
			ModuleInSort mdInSort = (ModuleInSort) it.next();
			if (mdInSort.match(descriptor, versionMatcher)) {
				return mdInSort;
            } else {
            	nonMatchingVersionReporter.reportNonMatchingVersion(descriptor, mdInSort.getSortedModuleDescriptor());
            }
        }
        return null;
    }

}

@@ -1582,28 +1582,8 @@
 ort 
-implements Iterable 
 %7B%0A%0A%09

remove dependency on jdk 5 specific interface (Iterable)