org.jsonschema2pojo.Jsonschema2Pojo.java Source code

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Here is the source code for org.jsonschema2pojo.Jsonschema2Pojo.java

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/**
 * Copyright  2010-2014 Nokia
 *
 * 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 org.jsonschema2pojo;

import static org.apache.commons.lang3.StringUtils.*;

import java.io.File;
import java.io.FileNotFoundException;
import java.io.IOException;
import java.io.UnsupportedEncodingException;
import java.net.URL;
import java.net.URLDecoder;
import java.util.Arrays;
import java.util.Collections;
import java.util.Iterator;
import java.util.List;

import org.apache.commons.io.FilenameUtils;
import org.jsonschema2pojo.exception.GenerationException;
import org.jsonschema2pojo.rules.RuleFactory;
import org.jsonschema2pojo.util.NameHelper;
import org.jsonschema2pojo.util.URLUtil;

import com.sun.codemodel.CodeWriter;
import com.sun.codemodel.JCodeModel;

public class Jsonschema2Pojo {
    /**
     * Reads the contents of the given source and initiates schema generation.
     *
     * @param config
     *            the configuration options (including source and target paths,
     *            and other behavioural options) that will control code
     *            generation
     * @throws FileNotFoundException
     *             if the source path is not found
     * @throws IOException
     *             if the application is unable to read data from the source
     */
    public static void generate(GenerationConfig config) throws IOException {
        Annotator annotator = getAnnotator(config);
        RuleFactory ruleFactory = createRuleFactory(config);

        ruleFactory.setAnnotator(annotator);
        ruleFactory.setGenerationConfig(config);

        SchemaMapper mapper = new SchemaMapper(ruleFactory, new SchemaGenerator());

        JCodeModel codeModel = new JCodeModel();

        if (config.isRemoveOldOutput()) {
            removeOldOutput(config.getTargetDirectory());
        }

        for (Iterator<URL> sources = config.getSource(); sources.hasNext();) {
            URL source = sources.next();

            if (URLUtil.parseProtocol(source.toString()) == URLProtocol.FILE
                    && URLUtil.getFileFromURL(source).isDirectory()) {
                generateRecursive(config, mapper, codeModel, defaultString(config.getTargetPackage()),
                        Arrays.asList(URLUtil.getFileFromURL(source).listFiles(config.getFileFilter())));
            } else {
                mapper.generate(codeModel, getNodeName(source), defaultString(config.getTargetPackage()), source);
            }
        }

        if (config.getTargetDirectory().exists() || config.getTargetDirectory().mkdirs()) {
            CodeWriter sourcesWriter = new FileCodeWriterWithEncoding(config.getTargetDirectory(),
                    config.getOutputEncoding());
            CodeWriter resourcesWriter = new FileCodeWriterWithEncoding(config.getTargetDirectory(),
                    config.getOutputEncoding());
            codeModel.build(sourcesWriter, resourcesWriter);
        } else {
            throw new GenerationException(
                    "Could not create or access target directory " + config.getTargetDirectory().getAbsolutePath());
        }
    }

    private static RuleFactory createRuleFactory(GenerationConfig config) {
        Class<? extends RuleFactory> clazz = config.getCustomRuleFactory();

        if (!RuleFactory.class.isAssignableFrom(clazz)) {
            throw new IllegalArgumentException("The class name given as a rule factory  (" + clazz.getName()
                    + ") does not refer to a class that implements " + RuleFactory.class.getName());
        }

        try {
            return clazz.newInstance();
        } catch (InstantiationException e) {
            throw new IllegalArgumentException(
                    "Failed to create a rule factory from the given class. An exception was thrown on trying to create a new instance.",
                    e.getCause());
        } catch (IllegalAccessException e) {
            throw new IllegalArgumentException(
                    "Failed to create a rule factory from the given class. It appears that we do not have access to this class - is both the class and its no-arg constructor marked public?",
                    e);
        }
    }

    private static void generateRecursive(GenerationConfig config, SchemaMapper mapper, JCodeModel codeModel,
            String packageName, List<File> schemaFiles) throws IOException {
        Collections.sort(schemaFiles);

        for (File child : schemaFiles) {
            if (child.isFile()) {
                mapper.generate(codeModel, getNodeName(child.toURI().toURL()), defaultString(packageName),
                        child.toURI().toURL());
            } else {
                generateRecursive(config, mapper, codeModel, childQualifiedName(packageName, child.getName()),
                        Arrays.asList(child.listFiles(config.getFileFilter())));
            }
        }
    }

    private static String childQualifiedName(String parentQualifiedName, String childSimpleName) {
        String safeChildName = childSimpleName.replaceAll(NameHelper.ILLEGAL_CHARACTER_REGEX, "_");
        return isEmpty(parentQualifiedName) ? safeChildName : parentQualifiedName + "." + safeChildName;
    }

    private static void removeOldOutput(File targetDirectory) {
        if (targetDirectory.exists()) {
            for (File f : targetDirectory.listFiles()) {
                delete(f);
            }
        }
    }

    @edu.umd.cs.findbugs.annotations.SuppressWarnings(value = "RV_RETURN_VALUE_IGNORED_BAD_PRACTICE")
    private static void delete(File f) {
        if (f.isDirectory()) {
            for (File child : f.listFiles()) {
                delete(child);
            }
        }
        f.delete();
    }

    private static Annotator getAnnotator(GenerationConfig config) {
        AnnotatorFactory factory = new AnnotatorFactory();
        return factory.getAnnotator(factory.getAnnotator(config.getAnnotationStyle()),
                factory.getAnnotator(config.getCustomAnnotator()));
    }

    private static String getNodeName(URL file) {
        try {
            return FilenameUtils.getBaseName(URLDecoder.decode(file.toString(), "UTF-8"));
        } catch (UnsupportedEncodingException e) {
            throw new IllegalArgumentException(
                    String.format("Unable to generate node name from URL: %s", file.toString()), e);
        }

    }
}