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Java implementation of the raml parser taken from https://github.com/raml-org/raml-java-parser and adjusted

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/*
 * 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.rule;

import java.lang.reflect.Type;
import java.util.List;

import org.raml.parser.resolver.DefaultScalarTupleHandler;
import org.yaml.snakeyaml.nodes.MappingNode;
import org.yaml.snakeyaml.nodes.NodeTuple;
import org.yaml.snakeyaml.nodes.ScalarNode;

public class PojoTupleRule extends DefaultTupleRule
{

    private Class pojoClass;

    public PojoTupleRule(String fieldName, Class pojoClass, NodeRuleFactory nodeRuleFactory)
    {
        this(fieldName, pojoClass);
        setNodeRuleFactory(nodeRuleFactory);
    }

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

    @Override
    public TupleRule getRuleForTuple(NodeTuple nodeTuple)
    {
        if (rules.isEmpty())
        {
            addRulesFor(pojoClass);
        }
        return super.getRuleForTuple(nodeTuple);
    }

    @Override
    public Class[] getValueNodeType()
    {
        return new Class[] {MappingNode.class};
    }

    @Override
    public void setValueType(Type valueType)
    {
        pojoClass = (Class) valueType;
    }

    @Override
    public List validateKey(ScalarNode key)
    {
        List validationResults = super.validateKey(key);
        if (getParentTupleRule() instanceof MapTupleRule)
        {
            ((MapTupleRule)getParentTupleRule()).checkDuplicate(key, validationResults);
        }
        return validationResults;
    }

    @Override
    public TupleRule deepCopy()
    {
        checkClassToCopy(PojoTupleRule.class);
        PojoTupleRule copy = new PojoTupleRule(getName(), pojoClass, getNodeRuleFactory());
        copy.setHandler(getHandler());
        copy.setRequired(isRequired());
        return copy;
    }
}