add BigIntegerConverter

core/pom.xml

@@ -110,12 +110,20 @@
             <version>${spring-jdbc.version}</version>
         </dependency>
 
+        <!-- test -->
         <dependency>
             <groupId>org.mockito</groupId>
             <artifactId>mockito-all</artifactId>
             <version>${mockito.version}</version>
             <scope>test</scope>
         </dependency>
+        <dependency>
+            <groupId>org.assertj</groupId>
+            <artifactId>assertj-core</artifactId>
+            <version>3.11.1</version>
+            <scope>test</scope>
+        </dependency>
+
     </dependencies>
 
     <build>

core/src/main/java/org/sql2o/converters/BigIntegerConverter.java

@@ -0,0 +1,32 @@
+package org.sql2o.converters;
+
+import java.math.BigInteger;
+
+public class BigIntegerConverter extends NumberConverter<BigInteger> {
+
+
+    public BigIntegerConverter() {
+        super(false);
+    }
+
+    @Override
+    protected BigInteger convertNumberValue(Number number) {
+        if (number instanceof BigInteger){
+            return (BigInteger)number;
+        }
+        else{
+            return BigInteger.valueOf(number.intValue());
+        }
+
+    }
+
+    @Override
+    protected BigInteger convertStringValue(String string) {
+        return BigInteger.valueOf(Integer.parseInt(string));
+    }
+
+    @Override
+    protected String getTypeDescription() {
+        return BigInteger.class.toString();
+    }
+}

core/src/main/java/org/sql2o/converters/Convert.java

@@ -11,6 +11,7 @@
 import java.io.ByteArrayInputStream;
 import java.io.InputStream;
 import java.math.BigDecimal;
+import java.math.BigInteger;
 import java.util.HashMap;
 import java.util.Map;
 import java.util.ServiceLoader;
@@ -54,6 +55,7 @@ private static void fillDefaults(Map<Class<?>, Converter<?>> mapToFill) {
         mapToFill.put(byte.class, new ByteConverter(true));
 
         mapToFill.put(BigDecimal.class, new BigDecimalConverter());
+        mapToFill.put(BigInteger.class,new BigIntegerConverter());
 
         mapToFill.put(String.class, new StringConverter());
 

core/src/test/java/org/sql2o/converters/BigIntegerConverterTest.java

@@ -0,0 +1,37 @@
+package org.sql2o.converters;
+
+import org.assertj.core.api.Assertions;
+import org.junit.Assert;
+import org.junit.Test;
+
+import static org.assertj.core.api.Assertions.assertThat;
+
+import java.math.BigInteger;
+
+public class BigIntegerConverterTest {
+
+    private BigIntegerConverter bigIntegerConverter = new BigIntegerConverter();
+
+    @Test
+    public void convertNumberValue(){
+        BigInteger bigInteger = bigIntegerConverter.convertNumberValue(1);
+        assertThat(bigInteger).isEqualTo(1);
+    }
+
+    @Test
+    public void convertBigIntegerValue(){
+        BigInteger bigInteger = bigIntegerConverter.convertNumberValue(BigInteger.valueOf(1L));
+        assertThat(bigInteger).isEqualTo(1);
+    }
+
+    @Test
+    public void convertStringValue(){
+        BigInteger bigInteger = bigIntegerConverter.convertStringValue("1");
+        assertThat(bigInteger).isEqualTo(1);
+    }
+
+    @Test
+    public void getTypeDescription(){
+        assertThat(bigIntegerConverter.getTypeDescription()).isEqualTo("class java.math.BigInteger");
+    }
+}