org.apache.nifi.processors.solr.RequestParamsUtil.java Source code

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Here is the source code for org.apache.nifi.processors.solr.RequestParamsUtil.java

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/*
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF 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.apache.nifi.processors.solr;

import org.apache.nifi.components.ValidationContext;
import org.apache.nifi.components.ValidationResult;
import org.apache.nifi.components.Validator;
import org.apache.solr.common.params.MultiMapSolrParams;

import java.util.HashMap;
import java.util.Map;

public class RequestParamsUtil {

    /**
     * Parses a String of request params into a MultiMap.
     *
     * @param requestParams
     *          the value of the request params property
     * @return
     */
    public static MultiMapSolrParams parse(final String requestParams) {
        final Map<String, String[]> paramsMap = new HashMap<>();
        if (requestParams == null || requestParams.trim().isEmpty()) {
            return new MultiMapSolrParams(paramsMap);
        }

        final String[] params = requestParams.split("[&]");
        if (params == null || params.length == 0) {
            throw new IllegalStateException("Parameters must be in form k1=v1&k2=v2, was" + requestParams);
        }

        for (final String param : params) {
            final String[] keyVal = param.split("=");
            if (keyVal.length != 2) {
                throw new IllegalStateException("Parameter must be in form key=value, was " + param);
            }

            final String key = keyVal[0].trim();
            final String val = keyVal[1].trim();
            MultiMapSolrParams.addParam(key, val, paramsMap);
        }

        return new MultiMapSolrParams(paramsMap);
    }

    /**
     * Creates a property validator for a request params string.
     *
     * @return valid if the input parses successfully, invalid otherwise
     */
    public static Validator getValidator() {
        return new Validator() {
            @Override
            public ValidationResult validate(String subject, String input, ValidationContext context) {
                try {
                    RequestParamsUtil.parse(input);
                    return new ValidationResult.Builder().subject(subject).input(input).explanation("Valid Params")
                            .valid(true).build();
                } catch (final Exception e) {
                    return new ValidationResult.Builder().subject(subject).input(input)
                            .explanation("Invalid Params" + e.getMessage()).valid(false).build();
                }
            }
        };
    }
}