org.springframework.cloud.contract.stubrunner.messaging.camel.StubRunnerCamelPredicate.java Source code

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Here is the source code for org.springframework.cloud.contract.stubrunner.messaging.camel.StubRunnerCamelPredicate.java

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/*
 *  Copyright 2013-2016 the original author or authors.
 *
 *  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.springframework.cloud.contract.stubrunner.messaging.camel;

import java.util.Map;
import java.util.regex.Pattern;

import org.apache.camel.Exchange;
import org.apache.camel.Predicate;
import org.springframework.cloud.contract.spec.Contract;
import org.springframework.cloud.contract.spec.internal.Header;
import org.springframework.cloud.contract.verifier.messaging.internal.ContractVerifierObjectMapper;
import org.springframework.cloud.contract.verifier.util.JsonPaths;
import org.springframework.cloud.contract.verifier.util.JsonToJsonPathsConverter;
import org.springframework.cloud.contract.verifier.util.MethodBufferingJsonVerifiable;

import com.fasterxml.jackson.core.JsonProcessingException;
import com.jayway.jsonpath.DocumentContext;
import com.jayway.jsonpath.JsonPath;
import com.toomuchcoding.jsonassert.JsonAssertion;
import com.toomuchcoding.jsonassert.JsonVerifiable;

/**
 * Passes through a message that matches the one defined in the DSL
 *
 * @author Marcin Grzejszczak
 */
class StubRunnerCamelPredicate implements Predicate {

    private final Contract groovyDsl;
    private final ContractVerifierObjectMapper objectMapper = new ContractVerifierObjectMapper();

    public StubRunnerCamelPredicate(Contract groovyDsl) {
        this.groovyDsl = groovyDsl;
    }

    @Override
    public boolean matches(Exchange exchange) {
        if (!headersMatch(exchange)) {
            return false;
        }
        Object inputMessage = exchange.getIn().getBody();
        JsonPaths jsonPaths = JsonToJsonPathsConverter.transformToJsonPathWithStubsSideValuesAndNoArraySizeCheck(
                this.groovyDsl.getInput().getMessageBody());
        DocumentContext parsedJson;
        try {
            parsedJson = JsonPath.parse(this.objectMapper.writeValueAsString(inputMessage));
        } catch (JsonProcessingException e) {
            throw new IllegalStateException("Cannot serialize to JSON", e);
        }
        boolean matches = true;
        for (MethodBufferingJsonVerifiable path : jsonPaths) {
            matches &= matchesJsonPath(parsedJson, path);
        }
        return matches;
    }

    private boolean matchesJsonPath(DocumentContext parsedJson, JsonVerifiable jsonVerifiable) {
        try {
            JsonAssertion.assertThat(parsedJson).matchesJsonPath(jsonVerifiable.jsonPath());
            return true;
        } catch (Exception e) {
            return false;
        }
    }

    private boolean headersMatch(Exchange exchange) {
        Map<String, Object> headers = exchange.getIn().getHeaders();
        boolean matches = true;
        for (Header it : this.groovyDsl.getInput().getMessageHeaders().getEntries()) {
            String name = it.getName();
            Object value = it.getClientValue();
            Object valueInHeader = headers.get(name);
            matches &= value instanceof Pattern ? ((Pattern) value).matcher(valueInHeader.toString()).matches()
                    : valueInHeader != null && valueInHeader.equals(value);
        }
        return matches;
    }
}