JSONPathSpecTest.java

/*
* Licensed to Metamarkets Group Inc. (Metamarkets) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. Metamarkets 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
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* KIND, either express or implied. See the License for the
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* under the License.
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package io.druid.data.input.impl;

import com.fasterxml.jackson.databind.ObjectMapper;
import com.google.common.collect.Lists;
import io.druid.TestObjectMapper;
import org.junit.Assert;
import org.junit.Test;

import java.io.IOException;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.List;

public class JSONPathSpecTest
{
  private final ObjectMapper jsonMapper = new TestObjectMapper();

  @Test
  public void testSerde() throws IOException
  {
    List<JSONPathFieldSpec> fields = new ArrayList<>();
    fields.add(JSONPathFieldSpec.createNestedField("foobar1", "$.foo.bar1"));
    fields.add(JSONPathFieldSpec.createNestedField("baz0", "$.baz[0]"));
    fields.add(JSONPathFieldSpec.createNestedField("hey0barx", "$.hey[0].barx"));
    fields.add(JSONPathFieldSpec.createRootField("timestamp"));
    fields.add(JSONPathFieldSpec.createRootField("foo.bar1"));

    JSONPathSpec flattenSpec = new JSONPathSpec(true, fields);

    final JSONPathSpec serde = jsonMapper.readValue(
        jsonMapper.writeValueAsString(flattenSpec),
        JSONPathSpec.class
    );
    Assert.assertTrue(serde.isUseFieldDiscovery());
    List<JSONPathFieldSpec> serdeFields = serde.getFields();
    JSONPathFieldSpec foobar1 = serdeFields.get(0);
    JSONPathFieldSpec baz0 = serdeFields.get(1);
    JSONPathFieldSpec hey0barx = serdeFields.get(2);
    JSONPathFieldSpec timestamp = serdeFields.get(3);
    JSONPathFieldSpec foodotbar1 = serdeFields.get(4);

    Assert.assertEquals(JSONPathFieldType.PATH, foobar1.getType());
    Assert.assertEquals("foobar1", foobar1.getName());
    Assert.assertEquals("$.foo.bar1", foobar1.getExpr());

    Assert.assertEquals(JSONPathFieldType.PATH, baz0.getType());
    Assert.assertEquals("baz0", baz0.getName());
    Assert.assertEquals("$.baz[0]", baz0.getExpr());

    Assert.assertEquals(JSONPathFieldType.PATH, hey0barx.getType());
    Assert.assertEquals("hey0barx", hey0barx.getName());
    Assert.assertEquals("$.hey[0].barx", hey0barx.getExpr());

    Assert.assertEquals(JSONPathFieldType.ROOT, timestamp.getType());
    Assert.assertEquals("timestamp", timestamp.getName());
    Assert.assertEquals("timestamp", timestamp.getExpr());

    Assert.assertEquals(JSONPathFieldType.ROOT, foodotbar1.getType());
    Assert.assertEquals("foo.bar1", foodotbar1.getName());
    Assert.assertEquals("foo.bar1", foodotbar1.getExpr());
  }
}