/*******************************************************************************
 * Copyright (c) 2005, 2011 IBM Corporation and others.
 *
 * This program and the accompanying materials
 * are made available under the terms of the Eclipse Public License 2.0
 * which accompanies this distribution, and is available at
 * https://www.eclipse.org/legal/epl-2.0/
 *
 * SPDX-License-Identifier: EPL-2.0
 *
 * Contributors:
 *     IBM Corporation - initial API and implementation
 *******************************************************************************/

package org.eclipse.jdt.internal.corext.refactoring.generics;

import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;

import org.eclipse.core.runtime.Assert;

import org.eclipse.jdt.core.ICompilationUnit;

import org.eclipse.jdt.internal.corext.refactoring.typeconstraints2.CastVariable2;
import org.eclipse.jdt.internal.corext.refactoring.typeconstraints2.CollectionElementVariable2;

public class InferTypeArgumentsUpdate {
	public static class CuUpdate {
		private List<CollectionElementVariable2> fDeclarations= new ArrayList<>();
		private List<CastVariable2> fCastsToRemove= new ArrayList<>();

		public List<CollectionElementVariable2> getDeclarations() {
			return fDeclarations;
		}

		public List<CastVariable2> getCastsToRemove() {
			return fCastsToRemove;
		}
	}

	private HashMap<ICompilationUnit, CuUpdate> fUpdates= new HashMap<>();

	public HashMap<ICompilationUnit, CuUpdate> getUpdates() {
		return fUpdates;
	}

	public void addDeclaration(CollectionElementVariable2 elementCv) {
		ICompilationUnit cu= elementCv.getCompilationUnit();
		if (cu == null)
			return;
		CuUpdate update= getUpdate(cu);
		update.fDeclarations.add(elementCv);
	}

	public void addCastToRemove(CastVariable2 castCv) {
		ICompilationUnit cu= castCv.getCompilationUnit();
		CuUpdate update= getUpdate(cu);
		update.fCastsToRemove.add(castCv);
	}

	private CuUpdate getUpdate(ICompilationUnit cu) {
		Assert.isNotNull(cu);
		Object obj= fUpdates.get(cu);
		CuUpdate update;
		if (obj == null) {
			update= new CuUpdate();
			fUpdates.put(cu, update);
		} else {
			update= (CuUpdate) obj;
		}
		return update;
	}

}
