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JsonPathLanguageTest.java
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JsonPathLanguageTest.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.camel.jsonpath;
import java.io.File;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import com.jayway.jsonpath.Option;
import org.apache.camel.Exchange;
import org.apache.camel.Expression;
import org.apache.camel.Predicate;
import org.apache.camel.spi.Language;
import org.apache.camel.support.DefaultExchange;
import org.apache.camel.test.junit5.CamelTestSupport;
import org.junit.jupiter.api.Test;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import static org.junit.jupiter.api.Assertions.assertEquals;
import static org.junit.jupiter.api.Assertions.assertFalse;
import static org.junit.jupiter.api.Assertions.assertNotNull;
import static org.junit.jupiter.api.Assertions.assertNull;
import static org.junit.jupiter.api.Assertions.assertTrue;
public class JsonPathLanguageTest extends CamelTestSupport {
private static final Logger LOG = LoggerFactory.getLogger(JsonPathLanguageTest.class);
@Override
public boolean isUseRouteBuilder() {
return false;
}
@Test
public void testExpressionArray() {
Exchange exchange = new DefaultExchange(context);
exchange.getIn().setBody(new File("src/test/resources/books.json"));
Language lan = context.resolveLanguage("jsonpath");
Expression exp = lan.createExpression("$.store.book[*].author");
List<?> authors = exp.evaluate(exchange, List.class);
LOG.debug("Authors {}", authors);
assertNotNull(authors);
assertEquals(3, authors.size());
assertEquals("Nigel Rees", authors.get(0));
assertEquals("Evelyn Waugh", authors.get(1));
assertEquals("John O'Niel", authors.get(2));
exp = lan.createExpression("$.store.bicycle.price");
String price = exp.evaluate(exchange, String.class);
assertEquals("19.95", price, "Got a wrong result");
}
@Test
public void testExpressionField() {
Exchange exchange = new DefaultExchange(context);
exchange.getIn().setBody(new File("src/test/resources/type.json"));
Language lan = context.resolveLanguage("jsonpath");
Expression exp = lan.createExpression("$.kind");
String kind = exp.evaluate(exchange, String.class);
assertNotNull(kind);
assertEquals("full", kind);
exp = lan.createExpression("$.type");
String type = exp.evaluate(exchange, String.class);
assertNotNull(type);
assertEquals("customer", type);
}
@Test
public void testExpressionPojo() {
Exchange exchange = new DefaultExchange(context);
Map pojo = new HashMap();
pojo.put("kind", "full");
pojo.put("type", "customer");
exchange.getIn().setBody(pojo);
Language lan = context.resolveLanguage("jsonpath");
Expression exp = lan.createExpression("$.kind");
String kind = exp.evaluate(exchange, String.class);
assertNotNull(kind);
assertEquals("full", kind);
exp = lan.createExpression("$.type");
String type = exp.evaluate(exchange, String.class);
assertNotNull(type);
assertEquals("customer", type);
}
@Test
public void testPredicate() {
// Test books.json file
Exchange exchange = new DefaultExchange(context);
exchange.getIn().setBody(new File("src/test/resources/books.json"));
Language lan = context.resolveLanguage("jsonpath");
Predicate pre = lan.createPredicate("$.store.book[?(@.price < 10)]");
boolean cheap = pre.matches(exchange);
assertTrue(cheap, "Should have cheap books");
pre = lan.createPredicate("$.store.book[?(@.price > 30)]");
boolean expensive = pre.matches(exchange);
assertFalse(expensive, "Should not have expensive books");
}
@Test
public void testSuppressException() {
Exchange exchange = new DefaultExchange(context);
exchange.getIn().setBody(new File("src/test/resources/type.json"));
JsonPathLanguage lan = (JsonPathLanguage) context.resolveLanguage("jsonpath");
Expression exp = lan.createExpression("$.foo",
new Object[] { null, null, null, null, null, null, null, Option.SUPPRESS_EXCEPTIONS });
String nofoo = exp.evaluate(exchange, String.class);
assertNull(nofoo);
}
@Test
public void testUnpackJsonArray() {
Exchange exchange = new DefaultExchange(context);
exchange.getIn().setBody(new File("src/test/resources/expensive.json"));
JsonPathLanguage language = (JsonPathLanguage) context.resolveLanguage("jsonpath");
Expression expression = language.createExpression("$.store.book",
new Object[] { null, null, null, null, null, null, true, true });
String json = expression.evaluate(exchange, String.class);
// check that a single json object is returned, not an array
assertTrue(json.startsWith("{") && json.endsWith("}"));
}
@Test
public void testDontUnpackJsonArray() {
Exchange exchange = new DefaultExchange(context);
exchange.getIn().setBody(new File("src/test/resources/books.json"));
JsonPathLanguage language = (JsonPathLanguage) context.resolveLanguage("jsonpath");
Expression expression = language.createExpression("$.store.book",
new Object[] { null, null, null, null, false, true });
String json = expression.evaluate(exchange, String.class);
// check that an array is returned, not a single object
assertTrue(json.startsWith("[") && json.endsWith("]"));
}
}