org.raml.parser.builder.PojoTupleBuilder Maven / Gradle / Ivy

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Java implementation of the raml parser taken from https://github.com/raml-org/raml-java-parser and adjusted
There is a newer version: 1.0.5
/*
 * Copyright 2013 (c) MuleSoft, Inc.
 *
 * 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.raml.parser.builder;

import java.lang.annotation.Annotation;
import java.lang.reflect.Constructor;
import java.lang.reflect.InvocationTargetException;
import java.util.ArrayList;
import java.util.List;
import java.util.Map;

import org.raml.parser.annotation.Key;
import org.raml.parser.annotation.Value;
import org.raml.parser.resolver.DefaultScalarTupleHandler;
import org.raml.parser.utils.ConvertUtils;
import org.raml.parser.utils.NodeUtils;
import org.raml.parser.utils.ReflectionUtils;
import org.yaml.snakeyaml.nodes.Node;
import org.yaml.snakeyaml.nodes.ScalarNode;

public class PojoTupleBuilder extends DefaultTupleBuilder
{

    private Class pojoClass;
    private String fieldName;

    public PojoTupleBuilder(String fieldName, Class pojoClass)
    {
        super(new DefaultScalarTupleHandler(fieldName));
        this.fieldName = fieldName;
        this.pojoClass = pojoClass;

    }

    public PojoTupleBuilder(Class pojoClass)
    {
        this(null, pojoClass);
    }

    @Override
    protected Map> getBuilders()
    {
        if (super.getBuilders().isEmpty())
        {
            addBuildersFor(pojoClass);
        }
        return super.getBuilders();
    }

    @Override
    public Object buildValue(Object parent, Node node)
    {
        try
        {
            Object newValue = null;
            if (pojoClass.isEnum())
            {
                newValue = ConvertUtils.convertTo((String) NodeUtils.getNodeValue(node), pojoClass);
            }
            else if (pojoClass.getDeclaredConstructors().length > 0)
            {
                newValue = buildValueByAnnotation(node);
            }

            if (newValue == null)
            {
                newValue = pojoClass.newInstance();
            }

            ReflectionUtils.setProperty(parent, fieldName, newValue);
            processPojoAnnotations(newValue, fieldName, parent);
            return newValue;
        }
        catch (InstantiationException e)
        {
            throw new RuntimeException(e);
        }
        catch (IllegalAccessException e)
        {
            throw new RuntimeException(e);
        }
        catch (InvocationTargetException e)
        {
            throw new RuntimeException(e);
        }
    }

    /**
     * Reflectively construct a new value object.
     * Searches for a constructor that accepts @Value and @Key annotated parameters only.
     * If one is not found then it falls back to a default constructor.
     */
    private Object buildValueByAnnotation(Node node) throws IllegalAccessException, InvocationTargetException, InstantiationException
    {
        for (Constructor declaredConstructor : pojoClass.getDeclaredConstructors())
        {
            List