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OAI-PMH base functionality used for both data and service providers.

There is a newer version: 5.2.2

/*
 * The contents of this file are subject to the license and copyright
 * detailed in the LICENSE and NOTICE files at the root of the source
 * tree and available online at
 *
 * http://www.dspace.org/license/
 */

/**
 * Licensed 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 io.gdcc.xoai.services.impl;

import io.gdcc.xoai.model.xoai.Element;
import io.gdcc.xoai.model.xoai.Field;
import io.gdcc.xoai.model.xoai.XOAIMetadata;
import io.gdcc.xoai.services.api.MetadataSearch;
import java.util.ArrayList;
import java.util.List;

public class MetadataSearchImpl extends AbstractMetadataSearcher
        implements MetadataSearch {

    public MetadataSearchImpl(XOAIMetadata metadata) {
        super(metadata);
    }

    protected void consume(List newNames, Element element) {
        List names = new ArrayList<>(newNames);
        names.add(element.getName());

        if (!element.getFields().isEmpty()) {
            for (Field field : element.getFields()) {
                if (field.getName() != null && !field.getName().equals(DEFAULT_FIELD)) {
                    add(String.join(".", names) + ":" + field.getName(), field.getValue());
                } else {
                    add(String.join(".", names), field.getValue());
                }
            }
        }

        if (!element.getElements().isEmpty()) {
            for (Element subElement : element.getElements()) {
                consume(names, subElement);
            }
        }
    }

    private void add(String name, String value) {
        index.computeIfAbsent(name, key -> new ArrayList<>());
        index.get(name).add(value);
    }
}