org.apache.zeppelin.interpreter.launcher.K8sSpecTemplate.java Source code

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Here is the source code for org.apache.zeppelin.interpreter.launcher.K8sSpecTemplate.java

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/*
 * Licensed to the Apache Software Foundation (ASF) under one or more
 * contributor license agreements.  See the NOTICE file distributed with
 * this work for additional information regarding copyright ownership.
 * The ASF licenses this file to You 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 org.apache.zeppelin.interpreter.launcher;

import com.hubspot.jinjava.Jinjava;
import org.apache.commons.io.FileUtils;

import java.io.File;
import java.io.IOException;
import java.nio.charset.Charset;
import java.util.HashMap;
import java.util.Map;
import java.util.Properties;
import java.util.Set;

public class K8sSpecTemplate extends HashMap<String, Object> {
    public String render(File templateFile) throws IOException {
        String template = FileUtils.readFileToString(templateFile, Charset.defaultCharset());
        return render(template);
    }

    public String render(String template) {
        ClassLoader oldCl = Thread.currentThread().getContextClassLoader();
        try {
            Thread.currentThread().setContextClassLoader(this.getClass().getClassLoader());
            Jinjava jinja = new Jinjava();
            return jinja.render(template, this);
        } finally {
            Thread.currentThread().setContextClassLoader(oldCl);
        }
    }

    public void loadProperties(Properties properties) {
        Set<Entry<Object, Object>> entries = properties.entrySet();
        for (Entry entry : entries) {
            String key = (String) entry.getKey();
            Object value = entry.getValue();

            String[] keySplit = key.split("[.]");
            Map<String, Object> target = this;
            for (int i = 0; i < keySplit.length - 1; i++) {
                if (!target.containsKey(keySplit[i])) {
                    HashMap subEntry = new HashMap();
                    target.put(keySplit[i], subEntry);
                    target = subEntry;
                } else {
                    Object subEntry = target.get(keySplit[i]);
                    if (!(subEntry instanceof Map)) {
                        HashMap replace = new HashMap();
                        replace.put("_", subEntry);
                        target.put(keySplit[i], replace);
                    }
                    target = (Map<String, Object>) target.get(keySplit[i]);
                }
            }

            if (target.get(keySplit[keySplit.length - 1]) instanceof Map) {
                ((Map) target.get(keySplit[keySplit.length - 1])).put("_", value);
            } else {
                target.put(keySplit[keySplit.length - 1], value);
            }
        }
    }
}