ClientYamlSuiteRestApiParser.java

/*
 * Licensed to Elasticsearch under one or more contributor
 * license agreements. See the NOTICE file distributed with
 * this work for additional information regarding copyright
 * ownership. Elasticsearch licenses this file to you 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.elasticsearch.test.rest.yaml.restspec;

import org.elasticsearch.common.xcontent.XContentParser;

import java.io.IOException;

/**
 * Parser for a {@link ClientYamlSuiteRestApi}.
 */
public class ClientYamlSuiteRestApiParser {

    public ClientYamlSuiteRestApi parse(String location, XContentParser parser) throws IOException {

        while ( parser.nextToken() != XContentParser.Token.FIELD_NAME ) {
            //move to first field name
        }

        ClientYamlSuiteRestApi restApi = new ClientYamlSuiteRestApi(location, parser.currentName());

        int level = -1;
        while (parser.nextToken() != XContentParser.Token.END_OBJECT || level >= 0) {

            if (parser.currentToken() == XContentParser.Token.FIELD_NAME) {
                if ("methods".equals(parser.currentName())) {
                    parser.nextToken();
                    while (parser.nextToken() == XContentParser.Token.VALUE_STRING) {
                        String method = parser.text();
                        if (restApi.getMethods().contains(method)) {
                            throw new IllegalArgumentException("Found duplicate method [" + method + "]");
                        }
                        restApi.addMethod(method);
                    }
                }

                if ("url".equals(parser.currentName())) {
                    String currentFieldName = "url";
                    int innerLevel = -1;
                    while(parser.nextToken() != XContentParser.Token.END_OBJECT || innerLevel >= 0) {
                        if (parser.currentToken() == XContentParser.Token.FIELD_NAME) {
                            currentFieldName = parser.currentName();
                        }

                        if (parser.currentToken() == XContentParser.Token.START_ARRAY && "paths".equals(currentFieldName)) {
                            while (parser.nextToken() == XContentParser.Token.VALUE_STRING) {
                                String path = parser.text();
                                if (restApi.getPaths().contains(path)) {
                                    throw new IllegalArgumentException("Found duplicate path [" + path + "]");
                                }
                                restApi.addPath(path);
                            }
                        }

                        if (parser.currentToken() == XContentParser.Token.START_OBJECT && "parts".equals(currentFieldName)) {
                            while (parser.nextToken() == XContentParser.Token.FIELD_NAME) {
                                String part = parser.currentName();
                                if (restApi.getPathParts().contains(part)) {
                                    throw new IllegalArgumentException("Found duplicate part [" + part + "]");
                                }
                                restApi.addPathPart(part);
                                parser.nextToken();
                                if (parser.currentToken() != XContentParser.Token.START_OBJECT) {
                                    throw new IllegalArgumentException("Expected parts field in rest api definition to contain an object");
                                }
                                parser.skipChildren();
                            }
                        }

                        if (parser.currentToken() == XContentParser.Token.START_OBJECT && "params".equals(currentFieldName)) {
                            while (parser.nextToken() == XContentParser.Token.FIELD_NAME) {
                                String param = parser.currentName();
                                if (restApi.getParams().contains(param)) {
                                    throw new IllegalArgumentException("Found duplicate param [" + param + "]");
                                }
                                restApi.addParam(parser.currentName());
                                parser.nextToken();
                                if (parser.currentToken() != XContentParser.Token.START_OBJECT) {
                                    throw new IllegalArgumentException("Expected params field in rest api definition to contain an object");
                                }
                                parser.skipChildren();
                            }
                        }

                        if (parser.currentToken() == XContentParser.Token.START_OBJECT) {
                            innerLevel++;
                        }
                        if (parser.currentToken() == XContentParser.Token.END_OBJECT) {
                            innerLevel--;
                        }
                    }
                }

                if ("body".equals(parser.currentName())) {
                    parser.nextToken();
                    if (parser.currentToken() != XContentParser.Token.VALUE_NULL) {
                        boolean requiredFound = false;
                        while(parser.nextToken() != XContentParser.Token.END_OBJECT) {
                            if (parser.currentToken() == XContentParser.Token.FIELD_NAME) {
                                if ("required".equals(parser.currentName())) {
                                    requiredFound = true;
                                    parser.nextToken();
                                    if (parser.booleanValue()) {
                                        restApi.setBodyRequired();
                                    } else {
                                        restApi.setBodyOptional();
                                    }
                                }
                            }
                        }
                        if (!requiredFound) {
                            restApi.setBodyOptional();
                        }
                    }
                }
            }

            if (parser.currentToken() == XContentParser.Token.START_OBJECT) {
                level++;
            }
            if (parser.currentToken() == XContentParser.Token.END_OBJECT) {
                level--;
            }

        }

        parser.nextToken();
        assert parser.currentToken() == XContentParser.Token.END_OBJECT : "Expected [END_OBJECT] but was ["  + parser.currentToken() +"]";
        parser.nextToken();

        return restApi;
    }
}