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Java implementation of the raml parser
There is a newer version: 0.8.40
/*
 * Copyright 2016 (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.visitor;

import static org.raml.parser.visitor.TupleType.KEY;

import java.util.List;

import org.raml.model.Raml;
import org.raml.parser.rule.BaseUriRule;
import org.raml.parser.rule.DefaultTupleRule;
import org.raml.parser.rule.ImplicitMapEntryRule;
import org.raml.parser.rule.NodeRule;
import org.raml.parser.rule.NodeRuleFactory;
import org.raml.parser.rule.SimpleRule;
import org.raml.parser.rule.TupleRule;
import org.raml.parser.rule.TypedTupleRule;
import org.raml.parser.rule.ValidationResult;
import org.yaml.snakeyaml.nodes.MappingNode;
import org.yaml.snakeyaml.nodes.Node;
import org.yaml.snakeyaml.nodes.ScalarNode;

public class RamlDocumentValidator extends YamlDocumentValidator
{

    private TemplateResolver templateResolver;
    private MediaTypeResolver mediaTypeResolver = new MediaTypeResolver();

    public RamlDocumentValidator()
    {
        super(Raml.class);
    }

    public RamlDocumentValidator(NodeRuleFactory nodeRuleFactory)
    {
        super(Raml.class, nodeRuleFactory);
    }

    public TemplateResolver getTemplateResolver()
    {
        if (templateResolver == null)
        {
            templateResolver = new TemplateResolver(getResourceLoader(), this);
        }
        return templateResolver;
    }

    public MediaTypeResolver getMediaTypeResolver()
    {
        return mediaTypeResolver;
    }

    @Override
    public boolean onMappingNodeStart(MappingNode mappingNode, TupleType tupleType)
    {
        super.onMappingNodeStart(mappingNode, tupleType);
        if (tupleType == KEY)
        {
            return true;
        }
        NodeRule rule = getRuleContext().peek();
        if (isResourceRule(rule))
        {
            List templateValidations = getTemplateResolver().resolve(
                    mappingNode, getResourceUri(rule), getFullUri(rule));
            getMessages().addAll(templateValidations);
        }
        else if (isBodyRule(rule))
        {
            List mediaTypeValidations = getMediaTypeResolver().resolve(mappingNode);
            getMessages().addAll(mediaTypeValidations);
        }
        return true;
    }

    private String getResourceUri(NodeRule resourceRule)
    {
        Node keyNode = ((DefaultTupleRule) resourceRule).getKey();
        return ((ScalarNode) keyNode).getValue();
    }

    private String getFullUri(NodeRule resourceRule)
    {
        String fullUri = "";
        while (resourceRule instanceof ImplicitMapEntryRule)
        {
            Node keyNode = ((DefaultTupleRule) resourceRule).getKey();
            fullUri = ((ScalarNode) keyNode).getValue() + fullUri;
            resourceRule = ((DefaultTupleRule) resourceRule).getParentTupleRule();
        }
        return fullUri;
    }

    private boolean isBodyRule(NodeRule rule)
    {
        return rule instanceof TypedTupleRule &&
               ((TypedTupleRule) rule).getValueType().getName().equals("org.raml.model.MimeType");
    }

    private boolean isResourceRule(NodeRule rule)
    {
        return rule instanceof TypedTupleRule &&
               ((TypedTupleRule) rule).getValueType().getName().equals("org.raml.model.Resource");
    }

    @Override
    public void onDocumentEnd(MappingNode node)
    {
        validateBaseUriAndVersion();
        super.onDocumentEnd(node);
    }

    private void validateBaseUriAndVersion()
    {
        BaseUriRule baseUriRule = getRule("baseUri");
        SimpleRule versionRule = getRule("version");

        if (versionRule.getKeyNode() == null && baseUriRule.getParameters().contains(versionRule.getName()))
        {
            ScalarNode node = baseUriRule.getValueNode();
            getMessages().add(ValidationResult.createErrorResult(BaseUriRule.VERSION_NOT_PRESENT_MESSAGE, node.getStartMark(), node.getEndMark()));
        }
    }

    private  T getRule(String fieldName)
    {
        //noinspection unchecked
        return (T) ((DefaultTupleRule) getRuleContext().peek()).getRuleByFieldName(fieldName);
    }
}