io.wcm.maven.plugins.i18n.readers.JsonI18nReader.java Source code

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Here is the source code for io.wcm.maven.plugins.i18n.readers.JsonI18nReader.java

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/*
 * #%L
 * wcm.io
 * %%
 * Copyright (C) 2014 wcm.io
 * %%
 * 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.
 * #L%
 */
package io.wcm.maven.plugins.i18n.readers;

import java.io.File;
import java.io.IOException;
import java.util.HashMap;
import java.util.Map;

import org.apache.commons.io.IOUtils;
import org.apache.commons.lang3.CharEncoding;
import org.apache.sling.commons.json.JSONArray;
import org.apache.sling.commons.json.JSONException;
import org.apache.sling.commons.json.JSONObject;

/**
 * Reads i18n resources from JSON files.
 */
public class JsonI18nReader implements I18nReader {

    @Override
    public Map<String, String> read(File sourceFile) throws IOException {
        String fileContent = IOUtils.toString(sourceFile.toURI().toURL(), CharEncoding.UTF_8);
        try {
            JSONObject root = new JSONObject(fileContent);
            Map<String, String> map = new HashMap<String, String>();
            parseJson(root, map, "");
            return map;
        } catch (JSONException ex) {
            throw new IOException("Unable to read JSON from " + sourceFile.getAbsolutePath(), ex);
        }
    }

    private void parseJson(JSONObject node, Map<String, String> map, String prefix)
            throws IOException, JSONException {
        JSONArray names = node.names();
        if (names == null) {
            return;
        }
        for (int i = 0; i < names.length(); i++) {
            String key = names.getString(i);
            Object item = node.get(key);
            if (item instanceof JSONObject) {
                parseJson((JSONObject) item, map, prefix + key + ".");
            } else if (item instanceof String) {
                map.put(prefix + key, (String) item);
            } else {
                throw new IOException("Unsupported JSON value: " + item.getClass().getName());
            }
        }
    }

}