Add a first-party converter for Wire.

pom.xml

@@ -54,6 +54,7 @@
     <!-- Converter Dependencies -->
     <protobuf.version>2.5.0</protobuf.version>
     <jackson.version>2.2.2</jackson.version>
+    <wire.version>1.0.0</wire.version>
 
     <!-- Test Dependencies -->
     <junit.version>4.10</junit.version>
@@ -113,7 +114,11 @@
         <artifactId>jackson-databind</artifactId>
         <version>${jackson.version}</version>
      </dependency>
-
+      <dependency>
+        <groupId>com.squareup.wire</groupId>
+        <artifactId>wire-runtime</artifactId>
+        <version>${wire.version}</version>
+      </dependency>
 
       <dependency>
         <groupId>junit</groupId>

retrofit-converters/pom.xml

@@ -17,5 +17,6 @@
   <modules>
     <module>protobuf</module>
     <module>jackson</module>
+    <module>wire</module>
   </modules>
 </project>

retrofit-converters/wire/pom.xml

@@ -0,0 +1,47 @@
+<?xml version="1.0" encoding="UTF-8"?>
+
+<!--
+  ~ Copyright 2013 Square, Inc.
+  -->
+
+<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>
+
+  <parent>
+    <groupId>com.squareup.retrofit</groupId>
+    <artifactId>retrofit-converters</artifactId>
+    <version>1.2.1-SNAPSHOT</version>
+    <relativePath>../pom.xml</relativePath>
+  </parent>
+
+  <artifactId>converter-wire</artifactId>
+  <name>Converter: Wire Protocol Buffers</name>
+
+  <dependencies>
+    <dependency>
+      <groupId>com.squareup.retrofit</groupId>
+      <artifactId>retrofit</artifactId>
+      <version>${project.version}</version>
+    </dependency>
+    <dependency>
+      <groupId>com.squareup.wire</groupId>
+      <artifactId>wire-runtime</artifactId>
+    </dependency>
+
+    <dependency>
+      <groupId>junit</groupId>
+      <artifactId>junit</artifactId>
+      <scope>test</scope>
+    </dependency>
+    <dependency>
+      <groupId>org.easytesting</groupId>
+      <artifactId>fest-assert-core</artifactId>
+      <scope>test</scope>
+    </dependency>
+    <dependency>
+      <groupId>com.google.guava</groupId>
+      <artifactId>guava</artifactId>
+      <scope>test</scope>
+    </dependency>
+  </dependencies>
+</project>

retrofit-converters/wire/src/main/java/retrofit/converter/WireConverter.java

@@ -0,0 +1,72 @@
+// Copyright 2013 Square, Inc.
+package retrofit.converter;
+
+import com.squareup.wire.Message;
+import com.squareup.wire.Wire;
+import java.io.ByteArrayOutputStream;
+import java.io.IOException;
+import java.io.InputStream;
+import java.io.OutputStream;
+import java.lang.reflect.Type;
+import retrofit.mime.TypedByteArray;
+import retrofit.mime.TypedInput;
+import retrofit.mime.TypedOutput;
+
+/** A {@link Converter} that reads and writes protocol buffers using Wire. */
+public class WireConverter implements Converter {
+  private static final String MIME_TYPE = "application/x-protobuf";
+
+  private final Wire wire;
+
+  public WireConverter(Wire wire) {
+    this.wire = wire;
+  }
+
+  @SuppressWarnings("unchecked") //
+  @Override public Object fromBody(TypedInput body, Type type) throws ConversionException {
+    if (!(type instanceof Class<?>)) {
+      throw new IllegalArgumentException("Expected a raw Class<?> but was " + type);
+    }
+    Class<?> c = (Class<?>) type;
+    if (!Message.class.isAssignableFrom(c)) {
+      throw new IllegalArgumentException("Expected a proto message but was " + c.getName());
+    }
+
+    if (!MIME_TYPE.equalsIgnoreCase(body.mimeType())) {
+      throw new IllegalArgumentException("Expected a proto but was: " + body.mimeType());
+    }
+
+    try {
+      byte[] data = consumeAsBytes(body.in());
+      return wire.parseFrom(data, (Class<Message>) c);
+    } catch (IOException e) {
+      throw new ConversionException(e);
+    }
+  }
+
+  @Override public TypedOutput toBody(Object object) {
+    if (!(object instanceof Message)) {
+      throw new IllegalArgumentException(
+          "Expected a proto message but was " + (object != null ? object.getClass().getName()
+              : "null"));
+    }
+    byte[] bytes = ((Message) object).toByteArray();
+    return new TypedByteArray(MIME_TYPE, bytes);
+  }
+
+  /** Reads a stream into a {@code byte} array. */
+  private byte[] consumeAsBytes(InputStream in) throws IOException {
+    ByteArrayOutputStream out = new ByteArrayOutputStream();
+    pipe(in, out);
+    return out.toByteArray();
+  }
+
+  /** Reads content from the given input and pipes it to the given output. */
+  private void pipe(InputStream in, OutputStream out) throws IOException {
+    byte[] buffer = new byte[4096];
+    int count;
+    while ((count = in.read(buffer)) != -1) {
+      out.write(buffer, 0, count);
+    }
+  }
+}

retrofit-converters/wire/src/test/java/retrofit/converter/Person.java

@@ -0,0 +1,210 @@
+// Copyright 2013 Square, Inc.
+
+// Code generated by Wire protocol buffer compiler, do not edit.
+// Source file: ../wire-runtime/src/test/proto/person.proto
+package retrofit.converter;
+
+import com.squareup.wire.Message;
+import com.squareup.wire.ProtoEnum;
+import com.squareup.wire.ProtoField;
+import java.util.Collections;
+import java.util.List;
+
+import static com.squareup.wire.Message.Datatype.ENUM;
+import static com.squareup.wire.Message.Datatype.INT32;
+import static com.squareup.wire.Message.Datatype.STRING;
+import static com.squareup.wire.Message.Label.REPEATED;
+import static com.squareup.wire.Message.Label.REQUIRED;
+
+public final class Person extends Message {
+
+  public static final String DEFAULT_NAME = "";
+  public static final Integer DEFAULT_ID = 0;
+  public static final String DEFAULT_EMAIL = "";
+  public static final List<PhoneNumber> DEFAULT_PHONE = Collections.emptyList();
+
+  /**
+   * The customer's full name.
+   */
+  @ProtoField(tag = 1, type = STRING, label = REQUIRED)
+  public final String name;
+
+  /**
+   * The customer's ID number.
+   */
+  @ProtoField(tag = 2, type = INT32, label = REQUIRED)
+  public final Integer id;
+
+  /**
+   * Email address for the customer.
+   */
+  @ProtoField(tag = 3, type = STRING)
+  public final String email;
+
+  /**
+   * A list of the user's phone numbers.
+   */
+  @ProtoField(tag = 4, label = REPEATED)
+  public final List<PhoneNumber> phone;
+
+  private Person(Builder builder) {
+    super(builder);
+    this.name = builder.name;
+    this.id = builder.id;
+    this.email = builder.email;
+    this.phone = immutableCopyOf(builder.phone);
+  }
+
+  @Override
+  public boolean equals(Object other) {
+    if (!(other instanceof Person)) return false;
+    Person o = (Person) other;
+    return equals(name, o.name)
+        && equals(id, o.id)
+        && equals(email, o.email)
+        && equals(phone, o.phone);
+  }
+
+  @Override
+  public int hashCode() {
+    int result = hashCode;
+    if (result == 0) {
+      result = name != null ? name.hashCode() : 0;
+      result = result * 37 + (id != null ? id.hashCode() : 0);
+      result = result * 37 + (email != null ? email.hashCode() : 0);
+      result = result * 37 + (phone != null ? phone.hashCode() : 0);
+      hashCode = result;
+    }
+    return result;
+  }
+
+  public static final class Builder extends Message.Builder<Person> {
+
+    public String name;
+    public Integer id;
+    public String email;
+    public List<PhoneNumber> phone;
+
+    public Builder() {
+    }
+
+    public Builder(Person message) {
+      super(message);
+      if (message == null) return;
+      this.name = message.name;
+      this.id = message.id;
+      this.email = message.email;
+      this.phone = copyOf(message.phone);
+    }
+
+    public Builder name(String name) {
+      this.name = name;
+      return this;
+    }
+
+    public Builder id(Integer id) {
+      this.id = id;
+      return this;
+    }
+
+    public Builder email(String email) {
+      this.email = email;
+      return this;
+    }
+
+    public Builder phone(List<PhoneNumber> phone) {
+      this.phone = phone;
+      return this;
+    }
+
+    @Override
+    public Person build() {
+      checkRequiredFields();
+      return new Person(this);
+    }
+  }
+
+  public enum PhoneType {
+    @ProtoEnum(0)
+    MOBILE,
+    @ProtoEnum(1)
+    HOME,
+    @ProtoEnum(2)
+    WORK,
+  }
+
+  public static final class PhoneNumber extends Message {
+
+    public static final String DEFAULT_NUMBER = "";
+    public static final PhoneType DEFAULT_TYPE = PhoneType.HOME;
+
+    /**
+     * The user's phone number.
+     */
+    @ProtoField(tag = 1, type = STRING, label = REQUIRED)
+    public final String number;
+
+    /**
+     * The type of phone stored here.
+     */
+    @ProtoField(tag = 2, type = ENUM)
+    public final PhoneType type;
+
+    private PhoneNumber(Builder builder) {
+      super(builder);
+      this.number = builder.number;
+      this.type = builder.type;
+    }
+
+    @Override
+    public boolean equals(Object other) {
+      if (!(other instanceof PhoneNumber)) return false;
+      PhoneNumber o = (PhoneNumber) other;
+      return equals(number, o.number)
+          && equals(type, o.type);
+    }
+
+    @Override
+    public int hashCode() {
+      int result = hashCode;
+      if (result == 0) {
+        result = number != null ? number.hashCode() : 0;
+        result = result * 37 + (type != null ? type.hashCode() : 0);
+        hashCode = result;
+      }
+      return result;
+    }
+
+    public static final class Builder extends Message.Builder<PhoneNumber> {
+
+      public String number;
+      public PhoneType type;
+
+      public Builder() {
+      }
+
+      public Builder(PhoneNumber message) {
+        super(message);
+        if (message == null) return;
+        this.number = message.number;
+        this.type = message.type;
+      }
+
+      public Builder number(String number) {
+        this.number = number;
+        return this;
+      }
+
+      public Builder type(PhoneType type) {
+        this.type = type;
+        return this;
+      }
+
+      @Override
+      public PhoneNumber build() {
+        checkRequiredFields();
+        return new PhoneNumber(this);
+      }
+    }
+  }
+}