/*
* Copyright (c) 2014, Francis Galiegue (fgaliegue@gmail.com)
*
* This software is dual-licensed under:
*
* - the Lesser General Public License (LGPL) version 3.0 or, at your option, any
* later version;
* - the Apache Software License (ASL) version 2.0.
*
* The text of both licenses is available under the src/resources/ directory of
* this project (under the names LGPL-3.0.txt and ASL-2.0.txt respectively).
*
* Direct link to the sources:
*
* - LGPL 3.0: https://www.gnu.org/licenses/lgpl-3.0.txt
* - ASL 2.0: http://www.apache.org/licenses/LICENSE-2.0.txt
*/
package com.github.fge.jsonschema.examples;
import com.fasterxml.jackson.databind.JsonNode;
import com.github.fge.jsonschema.core.exceptions.ProcessingException;
import com.github.fge.jsonschema.core.load.configuration.LoadingConfiguration;
import com.github.fge.jsonschema.core.load.configuration.LoadingConfigurationBuilder;
import com.github.fge.jsonschema.core.load.download.URIDownloader;
import com.github.fge.jsonschema.core.report.ProcessingReport;
import com.github.fge.jsonschema.main.JsonSchema;
import com.github.fge.jsonschema.main.JsonSchemaFactory;
import java.io.IOException;
import java.io.InputStream;
import java.net.URI;
/**
* Seventh example: custom URI scheme
*
* <p><a href="doc-files/Example7.java">link to source code</a></p>
*
* <p>This demonstrates {@link JsonSchemaFactory}'s ability to register a
* custom URI scheme. In this example, the scheme is {@code foobar}, and it is
* simply an alias to fetch a resource from the current package.</p>
*
* <p>Two things are needed:</p>
*
* <ul>
* <li>an implementation of {@link URIDownloader} for this scheme,</li>
* <li>registering this scheme using {@link
* LoadingConfigurationBuilder#addScheme(String, URIDownloader)}.</li>
* </ul>
*
* <p>Once this is done, this scheme, when encountered anywhere in JSON
* References, will use this downloader, and you are also able to use it when
* loading schemas using {@link JsonSchemaFactory#getJsonSchema(String)}, which
* is what this example does.</p>
*
* <p>The schema and files used are the same as for {@link Example2}.</p>
*/
public final class Example7
{
public static void main(final String... args)
throws IOException, ProcessingException
{
final JsonNode good = Utils.loadResource("/fstab-good.json");
final JsonNode bad = Utils.loadResource("/fstab-bad.json");
final JsonNode bad2 = Utils.loadResource("/fstab-bad2.json");
final LoadingConfiguration cfg = LoadingConfiguration.newBuilder()
.addScheme("foobar", CustomDownloader.getInstance()).freeze();
final JsonSchemaFactory factory = JsonSchemaFactory.newBuilder()
.setLoadingConfiguration(cfg).freeze();
final JsonSchema schema
= factory.getJsonSchema("foobar:/fstab.json#");
ProcessingReport report;
report = schema.validate(good);
System.out.println(report);
report = schema.validate(bad);
System.out.println(report);
report = schema.validate(bad2);
System.out.println(report);
}
private static final class CustomDownloader
implements URIDownloader
{
private static final String PREFIX;
private static final URIDownloader INSTANCE = new CustomDownloader();
static {
final String pkgname = CustomDownloader.class.getPackage()
.getName();
PREFIX = '/' + pkgname.replace(".", "/");
}
public static URIDownloader getInstance()
{
return INSTANCE;
}
@Override
public InputStream fetch(final URI source)
throws IOException
{
final String path = PREFIX + source.getPath();
final InputStream ret = getClass().getResourceAsStream(path);
if (ret == null)
throw new IOException("resource " + path + " not found");
return ret;
}
}
}