feat(samples): adds a Java version of the sample

pom.xml

@@ -13,6 +13,7 @@
 
     <modules>
         <module>nodes</module>
+        <module>samples/java-sample</module>
         <module>samples/kotlin-sample</module>
         <module>samples/scala-sample</module>
     </modules>

samples/java-sample/pom.xml

@@ -0,0 +1,40 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<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/xsd/maven-4.0.0.xsd">
+
+    <parent>
+        <artifactId>parent</artifactId>
+        <groupId>io.aexp.nodes.graphql</groupId>
+        <version>0.5.0</version>
+        <relativePath>../../pom.xml</relativePath>
+    </parent>
+    <modelVersion>4.0.0</modelVersion>
+
+    <artifactId>java-sample</artifactId>
+    <name>Java Sample</name>
+
+    <dependencies>
+        <dependency>
+            <groupId>${project.groupId}</groupId>
+            <artifactId>nodes</artifactId>
+            <version>${project.version}</version>
+        </dependency>
+    </dependencies>
+
+    <build>
+        <pluginManagement>
+            <plugins>
+                <plugin>
+                    <groupId>org.apache.maven.plugins</groupId>
+                    <artifactId>maven-compiler-plugin</artifactId>
+                    <version>3.8.0</version>
+                    <configuration>
+                        <release>11</release>
+                    </configuration>
+                </plugin>
+            </plugins>
+        </pluginManagement>
+    </build>
+
+</project>

samples/java-sample/src/main/java/Main.java

@@ -0,0 +1,49 @@
+/*
+ * Copyright (c) 2018 American Express Travel Related Services Company, Inc.
+ *
+ * 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.
+ */
+
+import java.math.BigDecimal;
+import java.math.BigInteger;
+import java.util.HashMap;
+
+import io.aexp.nodes.graphql.Argument;
+import io.aexp.nodes.graphql.Arguments;
+import io.aexp.nodes.graphql.GraphQLRequestEntity;
+import io.aexp.nodes.graphql.GraphQLTemplate;
+import io.aexp.nodes.graphql.Variable;
+import models.User;
+
+public class Main {
+
+	// https://developer.github.com/v4/guides/forming-calls/#authenticating-with-graphql
+	private static final String YOUR_AUTH_TOKEN = "eeb7987aef9ccd7440a49cae2acc7f58bb415059";
+
+	public static void main(String[] args) throws Exception {
+	    var headers = new HashMap<String, String>();
+	    headers.put("Authorization", "bearer " + YOUR_AUTH_TOKEN);
+
+	    var template = new GraphQLTemplate();
+	    var requestEntity = GraphQLRequestEntity.Builder()
+	            .url("https://api.github.com/graphql")
+	            .request(User.class)
+	            .headers(headers)
+	            .arguments(new Arguments("user", new Argument<>("login", "chemdrew")))
+	            .variables(new Variable<Boolean>("isFork", false))
+	            .scalars(BigDecimal.class, BigInteger.class)
+	            .build();
+	    var responseEnitity = template.query(requestEntity, User.class);
+
+	    System.out.println("request: " + requestEntity.getRequest());
+	    System.out.println("response: " + responseEnitity.getResponse());
+	}
+
+}

samples/java-sample/src/main/java/models/RepositoryConnection.java

@@ -0,0 +1,32 @@
+/*
+ * Copyright (c) 2018 American Express Travel Related Services Company, Inc.
+ *
+ * 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 models;
+
+public class RepositoryConnection {
+	private int totalCount;
+
+	public int getTotalCount() {
+		return totalCount;
+	}
+
+	public void setTotalCount(int totalCount) {
+		this.totalCount = totalCount;
+	}
+
+	@Override
+	public String toString() {
+		return String.format("RepositoryConnection(totalCount=%d)", totalCount);
+	}
+
+}

samples/java-sample/src/main/java/models/User.java

@@ -0,0 +1,56 @@
+/*
+ * Copyright (c) 2018 American Express Travel Related Services Company, Inc.
+ *
+ * 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 models;
+
+import io.aexp.nodes.graphql.annotations.GraphQLArgument;
+import io.aexp.nodes.graphql.annotations.GraphQLProperty;
+import io.aexp.nodes.graphql.annotations.GraphQLVariable;
+
+@GraphQLProperty(name = "user", arguments = { @GraphQLArgument(name = "login") })
+public class User {
+	private String name;
+	private String location;
+	@GraphQLVariable(name = "isFork", scalar = "Boolean!")
+	private RepositoryConnection repositories;
+
+	public String getName() {
+		return name;
+	}
+
+	public void setName(String name) {
+		this.name = name;
+	}
+
+	public String getLocation() {
+		return location;
+	}
+
+	public void setLocation(String location) {
+		this.location = location;
+	}
+
+	public RepositoryConnection getRepositories() {
+		return repositories;
+	}
+
+	public void setRepositories(RepositoryConnection repositories) {
+		this.repositories = repositories;
+	}
+
+	@Override
+	public String toString() {
+		return String.format("name=%s, location=%s, repositories=%s", name, location, repositories);
+	}
+
+}