org.hibernate.search.backend.elasticsearch.gson.impl.ArrayElementJsonAccessor.java Source code

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Here is the source code for org.hibernate.search.backend.elasticsearch.gson.impl.ArrayElementJsonAccessor.java

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/*
 * Hibernate Search, full-text search for your domain model
 *
 * License: GNU Lesser General Public License (LGPL), version 2.1 or later
 * See the lgpl.txt file in the root directory or <http://www.gnu.org/licenses/lgpl-2.1.html>.
 */
package org.hibernate.search.backend.elasticsearch.gson.impl;

import com.google.gson.JsonArray;
import com.google.gson.JsonElement;
import com.google.gson.JsonNull;

/**
 * @author Yoann Rodiere
 */
class ArrayElementJsonAccessor extends CrawlingJsonAccessor<JsonArray> {
    private final int index;

    public ArrayElementJsonAccessor(JsonCompositeAccessor<JsonArray> parentAccessor, int index) {
        super(parentAccessor);
        this.index = index;
    }

    @Override
    protected JsonElement doGet(JsonArray parent) {
        if (parent != null && index < parent.size()) {
            return parent.get(index);
        } else {
            return null;
        }
    }

    @Override
    protected void doSet(JsonArray parent, JsonElement newValue) {
        fillTo(parent, index);
        parent.set(index, newValue);
    }

    private static void fillTo(JsonArray array, int index) {
        for (int i = array.size(); i <= index; ++i) {
            array.add(JsonNull.INSTANCE);
        }
    }

    @Override
    protected void appendRuntimeRelativePath(StringBuilder path) {
        path.append("[").append(index).append("]");
    }

    @Override
    protected void appendStaticRelativePath(StringBuilder path, boolean first) {
        // Nothing to do
    }
}