001/*
002 * (C) Copyright 2006-2016 Nuxeo SA (http://nuxeo.com/) and others.
003 *
004 * Licensed under the Apache License, Version 2.0 (the "License");
005 * you may not use this file except in compliance with the License.
006 * You may obtain a copy of the License at
007 *
008 *     http://www.apache.org/licenses/LICENSE-2.0
009 *
010 * Unless required by applicable law or agreed to in writing, software
011 * distributed under the License is distributed on an "AS IS" BASIS,
012 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
013 * See the License for the specific language governing permissions and
014 * limitations under the License.
015 *
016 * Contributors:
017 *     Nuxeo - initial API and implementation
018 */
019package org.nuxeo.ecm.core.query.sql.model;
020
021import java.util.LinkedHashMap;
022
023import com.google.common.collect.Iterables;
024
025/**
026 * Here, key is holding the alias and value the document type.
027 *
028 * @author <a href="mailto:bs@nuxeo.com">Bogdan Stefanescu</a>
029 */
030public class FromList extends LinkedHashMap<String, String> {
031
032    private static final long serialVersionUID = -1931385427413643944L;
033
034    /**
035     * Don't use this method anymore. Now we can easily iterate over {@link FromList} with {@link #keySet()},
036     * {@link #values()} or {@link #entrySet()}.
037     * <p />
038     * We kept this method because removing it could lead to regressions as ({@link #get(Object)} is a candidate.
039     *
040     * @deprecated since 9.1
041     */
042    @Deprecated
043    public String get(int i) {
044        return Iterables.get(values(), i);
045    }
046
047    @Override
048    public String toString() {
049        if (isEmpty()) {
050            return "";
051        }
052        return String.join(", ", values());
053    }
054
055}