com.gs.obevo.db.testutil.TestTemplateUtil.java Source code

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Here is the source code for com.gs.obevo.db.testutil.TestTemplateUtil.java

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/**
 * Copyright 2017 Goldman Sachs.
 * 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 com.gs.obevo.db.testutil;

import java.io.File;
import java.io.FileWriter;
import java.io.IOException;
import java.io.Writer;
import java.util.Locale;
import java.util.Map;

import com.gs.obevo.db.apps.reveng.RevengWriter;
import freemarker.template.Configuration;
import freemarker.template.Template;
import freemarker.template.TemplateException;
import freemarker.template.TemplateExceptionHandler;
import org.apache.commons.io.IOUtils;

public class TestTemplateUtil {
    private static final TestTemplateUtil INSTANCE = new TestTemplateUtil();

    private final Configuration templateConfig;

    public static TestTemplateUtil getInstance() {
        return INSTANCE;
    }

    private TestTemplateUtil() {
        this.templateConfig = new Configuration();

        // Where load the templates from:
        templateConfig.setClassForTemplateLoading(RevengWriter.class, "/");

        // Some other recommended settings:
        templateConfig.setDefaultEncoding("UTF-8");
        templateConfig.setLocale(Locale.US);
        templateConfig.setTemplateExceptionHandler(TemplateExceptionHandler.RETHROW_HANDLER);
    }

    public void writeTemplate(String templatePath, Map<String, Object> params, File outputFile) {
        Writer fileWriter = null;
        try {
            Template template = templateConfig.getTemplate(templatePath);
            fileWriter = new FileWriter(outputFile);

            template.process(params, fileWriter);
        } catch (TemplateException e) {
            throw new RuntimeException(e);
        } catch (IOException e) {
            throw new RuntimeException(e);
        } finally {
            IOUtils.closeQuietly(fileWriter);
        }
    }

}