r/org.eclipse.statet.r.core/src/org/eclipse/statet/internal/r/core/pkgmanager/RRepoListPref.java

/*=============================================================================#
 # Copyright (c) 2012, 2019 Stephan Wahlbrink and others.
 # 
 # This program and the accompanying materials are made available under the
 # terms of the Eclipse Public License 2.0 which is available at
 # https://www.eclipse.org/legal/epl-2.0, or the Apache License, Version 2.0
 # which is available at https://www.apache.org/licenses/LICENSE-2.0.
 # 
 # SPDX-License-Identifier: EPL-2.0 OR Apache-2.0
 # 
 # Contributors:
 #     Stephan Wahlbrink <sw@wahlbrink.eu> - initial API and implementation
 #=============================================================================*/

package org.eclipse.statet.internal.r.core.pkgmanager;

import java.util.ArrayList;
import java.util.Collections;
import java.util.List;

import org.eclipse.statet.ecommons.preferences.core.Preference;

import org.eclipse.statet.r.core.pkgmanager.RRepo;


public class RRepoListPref extends Preference<List<RRepo>> {
	
	
	public RRepoListPref(final String qualifier, final String key) {
		super(qualifier, key);
	}
	
	
	@Override
	public Class<List<RRepo>> getUsageType() {
		return (Class) List.class;
	}
	
	@Override
	public List<RRepo> store2Usage(final String storeValue) {
		final String s= storeValue;
		if (s == null || s.isEmpty()) {
			return Collections.emptyList();
		}
		final String[] repos= IS2_SEPARATOR_PATTERN.split(s);
		final List<RRepo> list= new ArrayList<>(repos.length);
		for (int i= 0; i < repos.length; i++) {
			final String[] parts= IS1_SEPARATOR_PATTERN.split(repos[i]);
			if (parts.length >= 3) {
				list.add(RVarRepo.create(parts[0].intern(), parts[1], parts[2],
						(parts.length >= 4) ? Util.getPkgType(parts[3]) : null ));
			}
		}
		return list;
	}
	
	@Override
	public String usage2Store(final List<RRepo> usageValue) {
		if (usageValue.isEmpty()) {
			return ""; //$NON-NLS-1$
		}
		
		final StringBuilder sb= new StringBuilder(32 * usageValue.size());
		for (int i= 0; i < usageValue.size(); i++) {
			final RRepo repo= usageValue.get(i);
			sb.append(repo.getId());
			sb.append(IS1_SEPARATOR_CHAR);
			sb.append(repo.getName());
			sb.append(IS1_SEPARATOR_CHAR);
			sb.append((repo instanceof RVarRepo) ? ((RVarRepo) repo).getRawURL() : repo.getURL());
			sb.append(IS1_SEPARATOR_CHAR);
			if (repo.getPkgType() != null) {
				sb.append(repo.getPkgType());
			}
			sb.append(IS2_SEPARATOR_CHAR);
		}
		return sb.substring(0, sb.length() - 1);
	}
	
}