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@bbeck

bbeck/Bug.java

Last active August 29, 2015 14:00
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  1. bbeck revised this gist May 2, 2014. 1 changed file with 5 additions and 3 deletions.
    8 changes: 5 additions & 3 deletions pom.xml
    View file
    Original file line number Diff line number Diff line change
    @@ -13,6 +13,8 @@
    <properties>
    <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
    <project.reporting.outputEncoding>UTF-8</project.reporting.outputEncoding>
    <!-- <jackson.version>2.2.3</jackson.version> --> <!-- Works fine with 2.2.3 -->
    <jackson.version>2.3.2</jackson.version> <!-- Doesn't work with 2.3.2 -->
    </properties>

    <dependencies>
    @@ -24,17 +26,17 @@
    <dependency>
    <groupId>com.fasterxml.jackson.core</groupId>
    <artifactId>jackson-core</artifactId>
    <version>2.3.2</version>
    <version>${jackson.version}</version>
    </dependency>
    <dependency>
    <groupId>com.fasterxml.jackson.core</groupId>
    <artifactId>jackson-databind</artifactId>
    <version>2.3.2</version>
    <version>${jackson.version}</version>
    </dependency>
    <dependency>
    <groupId>com.fasterxml.jackson.datatype</groupId>
    <artifactId>jackson-datatype-guava</artifactId>
    <version>2.3.2</version>
    <version>${jackson.version}</version>
    </dependency>
    </dependencies>
    </project>
  2. bbeck created this gist May 2, 2014.
    154 changes: 154 additions & 0 deletions Bug.java
    View file
    Original file line number Diff line number Diff line change
    @@ -0,0 +1,154 @@
    package com.bazaarvoice.jackson;

    import com.fasterxml.jackson.annotation.JsonCreator;
    import com.fasterxml.jackson.annotation.JsonProperty;
    import com.fasterxml.jackson.annotation.JsonSubTypes;
    import com.fasterxml.jackson.annotation.JsonTypeInfo;
    import com.fasterxml.jackson.core.JsonProcessingException;
    import com.fasterxml.jackson.databind.MappingJsonFactory;
    import com.fasterxml.jackson.databind.ObjectMapper;
    import com.fasterxml.jackson.datatype.guava.GuavaModule;
    import com.google.common.base.Objects;
    import com.google.common.base.Optional;
    import com.google.common.collect.ImmutableMap;

    import java.util.Map;

    public class Bug {
    static class ContainerA {
    @JsonProperty private Optional<String> name = Optional.absent();
    @JsonProperty private Optional<Strategy> strategy = Optional.absent();

    @Override
    public String toString() {
    return Objects.toStringHelper(this)
    .add("name", name)
    .add("strategy", strategy)
    .toString();
    }
    }

    static class ContainerB {
    @JsonProperty private Optional<String> name = Optional.absent();
    @JsonProperty private Strategy strategy = null;

    @Override
    public String toString() {
    return Objects.toStringHelper(this)
    .add("name", name)
    .add("strategy", strategy)
    .toString();
    }
    }

    @JsonTypeInfo(use = JsonTypeInfo.Id.NAME, include = JsonTypeInfo.As.PROPERTY, property = "type")
    @JsonSubTypes({
    @JsonSubTypes.Type(name = "Foo", value = Foo.class),
    @JsonSubTypes.Type(name = "Bar", value = Bar.class),
    @JsonSubTypes.Type(name = "Baz", value = Baz.class)
    })
    static interface Strategy {
    }

    static class Foo implements Strategy {
    @JsonProperty private final int foo;
    @JsonCreator Foo(@JsonProperty("foo") int foo) {
    this.foo = foo;
    }

    @Override
    public String toString() {
    return Objects.toStringHelper(this)
    .add("foo", foo)
    .toString();
    }
    }

    static class Bar implements Strategy {
    @JsonProperty private final boolean bar;
    @JsonCreator Bar(@JsonProperty("bar") boolean bar) {
    this.bar = bar;
    }

    @Override
    public String toString() {
    return Objects.toStringHelper(this)
    .add("bar", bar)
    .toString();
    }
    }

    static class Baz implements Strategy {
    @JsonProperty private final String baz;
    @JsonCreator Baz(@JsonProperty("baz") String baz) {
    this.baz = baz;
    }

    @Override
    public String toString() {
    return Objects.toStringHelper(this)
    .add("baz", baz)
    .toString();
    }
    }

    private static final ObjectMapper mapper = new MappingJsonFactory().getCodec().registerModule(new GuavaModule());

    public static void main(String[] args) throws JsonProcessingException {
    ImmutableMap<String, Object> foo = ImmutableMap.<String, Object>builder()
    .put("name", "foo strategy")
    .put("strategy", ImmutableMap.builder()
    .put("type", "Foo")
    .put("foo", 42)
    .build())
    .build();

    ImmutableMap<String, Object> bar = ImmutableMap.<String, Object>builder()
    .put("name", "bar strategy")
    .put("strategy", ImmutableMap.builder()
    .put("type", "Boo")
    .put("bar", true)
    .build())
    .build();

    ImmutableMap<String, Object> baz = ImmutableMap.<String, Object>builder()
    .put("name", "baz strategy")
    .put("strategy", ImmutableMap.builder()
    .put("type", "Baz")
    .put("baz", "hello world!")
    .build())
    .build();

    test(foo);
    test(bar);
    test(baz);
    }

    private static void test(Map<String, ?> map) throws JsonProcessingException {
    String json = mapper.writeValueAsString(map);
    System.out.println("Running test case on: " + json);
    System.out.println();

    System.out.println("Trying ContainerA:");
    try {
    ContainerA obj = mapper.readValue(json, ContainerA.class);
    System.out.println(obj);
    } catch (Exception e) {
    e.printStackTrace(System.out);
    }
    System.out.println();

    System.out.println("Trying ContainerB:");
    try {
    ContainerB obj = mapper.readValue(json, ContainerB.class);
    System.out.println(obj);
    } catch (Exception e) {
    e.printStackTrace(System.out);
    }
    System.out.println();

    System.out.println();
    System.out.println("===============================");
    System.out.println();
    }
    }
    40 changes: 40 additions & 0 deletions pom.xml
    View file
    Original file line number Diff line number Diff line change
    @@ -0,0 +1,40 @@
    <?xml version="1.0"?>
    <project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/maven-v4_0_0.xsd">
    <modelVersion>4.0.0</modelVersion>

    <groupId>com.bazaarvoice</groupId>
    <artifactId>jackson-bug</artifactId>
    <version>1-SNAPSHOT</version>
    <packaging>jar</packaging>

    <name>Jackson Bug</name>
    <description>Jackson Bug</description>

    <properties>
    <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
    <project.reporting.outputEncoding>UTF-8</project.reporting.outputEncoding>
    </properties>

    <dependencies>
    <dependency>
    <groupId>com.google.guava</groupId>
    <artifactId>guava</artifactId>
    <version>16.0.1</version>
    </dependency>
    <dependency>
    <groupId>com.fasterxml.jackson.core</groupId>
    <artifactId>jackson-core</artifactId>
    <version>2.3.2</version>
    </dependency>
    <dependency>
    <groupId>com.fasterxml.jackson.core</groupId>
    <artifactId>jackson-databind</artifactId>
    <version>2.3.2</version>
    </dependency>
    <dependency>
    <groupId>com.fasterxml.jackson.datatype</groupId>
    <artifactId>jackson-datatype-guava</artifactId>
    <version>2.3.2</version>
    </dependency>
    </dependencies>
    </project>