org.opengeo.gsr.validation.JSONValidator.java Source code

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Here is the source code for org.opengeo.gsr.validation.JSONValidator.java

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/* Copyright (c) 2013 - 2014 Boundless - http://boundlessgeo.com All rights reserved.
 * This code is licensed under the GPL 2.0 license, available at the root
 * application directory.
 */
package org.opengeo.gsr.validation;

import java.io.File;
import java.io.Reader;
import java.io.StringReader;

import com.fasterxml.jackson.databind.JsonNode;
import com.github.fge.jsonschema.cfg.LoadingConfiguration;
import com.github.fge.jsonschema.exceptions.ProcessingException;
import com.github.fge.jsonschema.main.JsonSchema;
import com.github.fge.jsonschema.main.JsonSchemaFactory;
import com.github.fge.jsonschema.report.ProcessingMessage;
import com.github.fge.jsonschema.report.ProcessingReport;
import com.github.fge.jsonschema.util.JsonLoader;

/**
 * 
 * @author Juan Marin, OpenGeo
 * 
 */
public class JSONValidator {

    public static boolean isValidSchema(String json, File schemaFile) {
        boolean isValid = false;
        final String baseURI = "file:///" + schemaFile.getAbsolutePath();

        JsonSchema schema;
        try {
            JsonSchemaFactory factory = JsonSchemaFactory.newBuilder()
                    .setLoadingConfiguration(LoadingConfiguration.newBuilder().setNamespace(baseURI).freeze())
                    .freeze();
            JsonNode rawSchema = JsonLoader.fromFile(schemaFile);
            schema = factory.getJsonSchema(rawSchema);
        } catch (Exception e) {
            throw new RuntimeException("Failed to load JSON Schema from " + baseURI, e);
        }

        JsonNode jsonNode;
        try {
            Reader reader = new StringReader(json);
            jsonNode = JsonLoader.fromReader(reader);
        } catch (Exception e) {
            throw new RuntimeException("Couldn't load (" + json + ") as JSON", e);
        }

        ProcessingReport report;
        try {
            report = schema.validate(jsonNode);
        } catch (ProcessingException e) {
            e.printStackTrace();
            return false;
        }

        isValid = report.isSuccess();
        if (!isValid) {
            System.out.println("ERROR validating Json Schema in " + schemaFile);
            for (ProcessingMessage msg : report) {
                System.out.println(msg);
            }
        }
        return isValid;
    }
}