la.alsocan.jsonshapeshifter.Main.java Source code

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Here is the source code for la.alsocan.jsonshapeshifter.Main.java

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/*
 * The MIT License
 *
 * Copyright 2014 Florian Poulin - https://github.com/fpoulin.
 *
 * Permission is hereby granted, free of charge, to any person obtaining a copy
 * of this software and associated documentation files (the "Software"), to deal
 * in the Software without restriction, including without limitation the rights
 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
 * copies of the Software, and to permit persons to whom the Software is
 * furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included in
 * all copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
 * THE SOFTWARE.
 */
package la.alsocan.jsonshapeshifter;

import com.fasterxml.jackson.core.JsonProcessingException;
import com.fasterxml.jackson.databind.JsonNode;
import com.fasterxml.jackson.databind.ObjectMapper;
import java.io.File;
import la.alsocan.jsonshapeshifter.schemas.Schema;
import java.io.IOException;
import java.util.Iterator;
import la.alsocan.jsonshapeshifter.bindings.ArrayNodeBinding;
import la.alsocan.jsonshapeshifter.bindings.StringConstantBinding;
import la.alsocan.jsonshapeshifter.bindings.StringNodeBinding;
import la.alsocan.jsonshapeshifter.schemas.SchemaNode;

/**
 * Test application to play with the transformations.
 * 
 * @author Florian Poulin - https://github.com/fpoulin
 */
public class Main {

    private final static String SOURCE_PAYLOAD = "target/classes/payloads/source.json";
    private final static String SOURCE_SCHEMA = "target/classes/schemas/source.json";
    private final static String TARGET_SCHEMA = "target/classes/schemas/target.json";

    /**
     * An entry point, to test the library in action.
     * @param args Console args (nothing expected here so far)
     * @throws IOException if the payload cannot be read
     */
    public static void main(String[] args) throws IOException {

        Schema source;
        Schema target;
        try {
            source = Schema.buildSchema(SOURCE_SCHEMA);
            target = Schema.buildSchema(TARGET_SCHEMA);
        } catch (IOException ex) {
            System.err.println("Oups: " + ex);
            return;
        }

        // build the transformation incrementally
        Transformation t = new Transformation(source, target);
        Iterator<SchemaNode> it = t.toBind();
        t.bind(it.next(), new ArrayNodeBinding(source.at("/rootSourceArray")));
        t.bind(it.next(), new ArrayNodeBinding(source.at("/rootSourceArray/{i}")));
        t.bind(it.next(), new StringConstantBinding("Constant value"));
        t.bind(it.next(), new StringNodeBinding(source.at("/rootSourceString")));
        t.bind(it.next(), new ArrayNodeBinding(source.at("/rootSourceArray/{i}/{i}/someSourceArray")));
        t.bind(it.next(), new StringNodeBinding(source.at("/rootSourceArray/{i}/{i}/someSourceArray/{i}")));

        // produce something
        JsonNode payload = new ObjectMapper().readTree(new File(SOURCE_PAYLOAD));
        JsonNode result = t.apply(payload);
        ObjectMapper om = new ObjectMapper();
        try {
            System.out.println("Original payload:");
            System.out.println(om.writerWithDefaultPrettyPrinter().writeValueAsString(payload));
            System.out.println("\nResulting payload:");
            System.out.println(om.writerWithDefaultPrettyPrinter().writeValueAsString(result));
        } catch (JsonProcessingException ex) {
            System.err.println("Oups: " + ex);
        }
    }
}