org.rascalmpl.library.lang.json.IOCompiled.java Source code

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Here is the source code for org.rascalmpl.library.lang.json.IOCompiled.java

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/*******************************************************************************
 * Copyright (c) 2009-2013 CWI
 * All rights reserved. This program and the accompanying materials
 * are made available under the terms of the Eclipse Public License v1.0
 * which accompanies this distribution, and is available at
 * http://www.eclipse.org/legal/epl-v10.html
 *
 * Contributors:
    
 *   * Jurgen J. Vinju - Jurgen.Vinju@cwi.nl - CWI
 *   * Mark Hills - Mark.Hills@cwi.nl (CWI)
 *   * Arnold Lankamp - Arnold.Lankamp@cwi.nl
 *   * Bert Lisser    - Bert.Lisser@cwi.nl
 *******************************************************************************/
package org.rascalmpl.library.lang.json;

import java.io.IOException;

import org.rascalmpl.interpreter.TypeReifier;
import org.rascalmpl.interpreter.utils.RuntimeExceptionFactory;
import org.rascalmpl.library.experiments.Compiler.RVM.Interpreter.RascalExecutionContext;
import org.rascalmpl.library.lang.json.io.JSONReadingTypeVisitor;
import org.rascalmpl.value.IConstructor;
import org.rascalmpl.value.IMap;
import org.rascalmpl.value.IString;
import org.rascalmpl.value.IValue;
import org.rascalmpl.value.IValueFactory;
import org.rascalmpl.value.type.Type;
import org.rascalmpl.value.type.TypeStore;

import com.google.gson.FieldNamingPolicy;
import com.google.gson.Gson;
import com.google.gson.GsonBuilder;
import com.ibm.icu.text.DateFormat;

/*
 * This class overrides the method fromJSON from lang/json/IO that need to be handled differenty in compiled code
 * since we have to reify the type differently.
 */

public class IOCompiled extends IO {
    private final IValueFactory values;
    private TypeReifier tr;

    public IOCompiled(IValueFactory values) {
        super(values);
        this.values = values;
        this.tr = new TypeReifier(values);
    }

    public IValue fromJSON(IValue type, IString src, RascalExecutionContext rex) {
        TypeStore store = new TypeStore();

        IConstructor type_cons = ((IConstructor) type);
        IMap definitions = rex.getSymbolDefinitions();

        tr.declareAbstractDataTypes(definitions, store);
        Type start = tr.valueToType(type_cons, store);

        //TypeStore store = ctx.getCurrentEnvt().getStore();
        //Type start = new TypeReifier(ctx.getValueFactory()).valueToType((IConstructor) type, store);

        //System.err.println("fromJSON0:"+start);
        Gson gson = new GsonBuilder().enableComplexMapKeySerialization().setDateFormat(DateFormat.LONG)
                .setFieldNamingPolicy(FieldNamingPolicy.UPPER_CAMEL_CASE).setVersion(1.0).create();
        //System.err.println("fromJSON1:"+src.getValue());
        Object obj = gson.fromJson(src.getValue(), Object.class);
        //System.err.println("fromJSON2:"+start);
        try {
            return JSONReadingTypeVisitor.read(obj, values, store, start);
        } catch (IOException e) {
            throw RuntimeExceptionFactory.io(values.string(e.getMessage()), null, null);
        }
    }

}