#113 build is clean

pom.xml

@@ -60,6 +60,12 @@ OF THE POSSIBILITY OF SUCH DAMAGE.
     </site>
   </distributionManagement>
   <dependencies>
+    <dependency>
+      <groupId>javax.validation</groupId>
+      <artifactId>validation-api</artifactId>
+      <version>2.0.1.Final</version>
+      <scope>provided</scope>
+    </dependency>
     <dependency>
       <groupId>org.projectlombok</groupId>
       <artifactId>lombok</artifactId>
@@ -227,6 +233,7 @@ OF THE POSSIBILITY OF SUCH DAMAGE.
             <configuration>
               <excludes combine.children="append">
                 <exclude>findbugs:.*</exclude>
+                <exclude>duplicatefinder:.*</exclude>
               </excludes>
             </configuration>
           </plugin>

src/main/java/com/jcabi/dynamo/AttributeUpdates.java

@@ -38,11 +38,9 @@
 import com.jcabi.immutable.ArrayMap;
 import java.util.ArrayList;
 import java.util.Collection;
-import java.util.Locale;
 import java.util.Map;
 import java.util.Set;
 import java.util.concurrent.ConcurrentHashMap;
-import java.util.concurrent.ConcurrentMap;
 import lombok.EqualsAndHashCode;
 
 /**

src/main/java/com/jcabi/dynamo/AwsItem.java

@@ -45,7 +45,6 @@
 import com.jcabi.log.Logger;
 import java.io.IOException;
 import java.util.Collections;
-import java.util.Locale;
 import java.util.Map;
 import java.util.NoSuchElementException;
 import lombok.EqualsAndHashCode;
@@ -60,6 +59,7 @@
 @Loggable(Loggable.DEBUG)
 @ToString
 @EqualsAndHashCode(of = { "credentials", "frm", "name", "attributes" })
+@SuppressWarnings("PMD.GuardLogStatement")
 final class AwsItem implements Item {
 
     /**

src/main/java/com/jcabi/dynamo/AwsIterator.java

@@ -64,6 +64,7 @@
     (
         of = { "credentials", "conditions", "frame", "name", "keys", "valve" }
     )
+@SuppressWarnings("PMD.GuardLogStatement")
 final class AwsIterator implements Iterator<Item> {
 
     /**
@@ -220,17 +221,21 @@ public void remove() {
 
     /**
      * Dosage with fixed list of items.
+     *
+     * @since 0.1
      */
     @Immutable
     private static final class Fixed implements Dosage {
         /**
          * List of items.
          */
         private final transient Array<Map<String, AttributeValue>> list;
+
         /**
          * Previous dosage.
          */
         private final transient Dosage prev;
+
         /**
          * Ctor.
          * @param dsg Dosage
@@ -240,14 +245,17 @@ private static final class Fixed implements Dosage {
             this.prev = dsg;
             this.list = new Array<>(items);
         }
+
         @Override
         public List<Map<String, AttributeValue>> items() {
             return Collections.unmodifiableList(this.list);
         }
+
         @Override
         public Dosage next() {
             return this.prev.next();
         }
+
         @Override
         public boolean hasNext() {
             return this.prev.hasNext();

src/main/java/com/jcabi/dynamo/AwsTable.java

@@ -63,6 +63,7 @@
 @Loggable(Loggable.DEBUG)
 @ToString
 @EqualsAndHashCode(of = { "credentials", "reg", "self" })
+@SuppressWarnings("PMD.GuardLogStatement")
 final class AwsTable implements Table {
 
     /**

src/main/java/com/jcabi/dynamo/Conditions.java

@@ -64,6 +64,7 @@
     (
         {
             "PMD.TooManyMethods",
+            "PMD.ProhibitPublicStaticMethods",
             "PMD.AvoidInstantiatingObjectsInLoops"
         }
     )

src/main/java/com/jcabi/dynamo/Credentials.java

@@ -29,7 +29,6 @@
  */
 package com.jcabi.dynamo;
 
-import com.amazonaws.auth.AWSCredentialsProvider;
 import com.amazonaws.auth.AWSStaticCredentialsProvider;
 import com.amazonaws.auth.BasicAWSCredentials;
 import com.amazonaws.client.builder.AwsClientBuilder;
@@ -82,14 +81,17 @@ final class Simple implements Credentials {
          * AWS key.
          */
         private final transient String key;
+
         /**
          * AWS secret.
          */
         private final transient String secret;
+
         /**
          * Region name.
          */
         private final transient String region;
+
         /**
          * Public ctor, with "us-east-1" region.
          * @param akey AWS key
@@ -98,6 +100,7 @@ final class Simple implements Credentials {
         public Simple(final String akey, final String scrt) {
             this(akey, scrt, Regions.US_EAST_1.getName());
         }
+
         /**
          * Public ctor.
          * @param akey AWS key
@@ -109,10 +112,12 @@ public Simple(final String akey, final String scrt, final String reg) {
             this.secret = scrt;
             this.region = reg;
         }
+
         @Override
         public String toString() {
             return String.format("%s/%s", this.region, this.key);
         }
+
         @Override
         public AmazonDynamoDB aws() {
             final com.amazonaws.regions.Region reg =
@@ -147,23 +152,27 @@ final class Assumed implements Credentials {
          * Region name.
          */
         private final transient String region;
+
         /**
          * Public ctor.
          */
         public Assumed() {
             this(Regions.US_EAST_1.getName());
         }
+
         /**
          * Public ctor.
          * @param reg Region
          */
         public Assumed(final String reg) {
             this.region = reg;
         }
+
         @Override
         public String toString() {
             return this.region;
         }
+
         @Override
         public AmazonDynamoDB aws() {
             final com.amazonaws.regions.Region reg =
@@ -192,10 +201,12 @@ final class Direct implements Credentials {
          * Original credentials.
          */
         private final transient Credentials.Simple origin;
+
         /**
          * Endpoint.
          */
         private final transient String endpoint;
+
         /**
          * Public ctor.
          * @param creds Original credentials
@@ -205,6 +216,7 @@ public Direct(final Credentials.Simple creds, final String pnt) {
             this.origin = creds;
             this.endpoint = pnt;
         }
+
         /**
          * Public ctor.
          * @param creds Original credentials
@@ -213,10 +225,12 @@ public Direct(final Credentials.Simple creds, final String pnt) {
         public Direct(final Credentials.Simple creds, final int port) {
             this(creds, String.format("http://localhost:%d", port));
         }
+
         @Override
         public String toString() {
             return String.format("%s at %s", this.origin, this.endpoint);
         }
+
         @Override
         public AmazonDynamoDB aws() {
             return AmazonDynamoDBClientBuilder.standard()

src/main/java/com/jcabi/dynamo/Dosage.java

@@ -66,6 +66,8 @@ public interface Dosage {
 
     /**
      * Always empty.
+     *
+     * @since 0.1
      */
     @Immutable
     @Loggable(Loggable.DEBUG)
@@ -76,12 +78,14 @@ final class Empty implements Dosage {
         public List<Map<String, AttributeValue>> items() {
             return new ArrayList<>(0);
         }
+
         @Override
         public Dosage next() {
             throw new IllegalStateException(
                 "this is nothing left"
             );
         }
+
         @Override
         public boolean hasNext() {
             return false;

src/main/java/com/jcabi/dynamo/QueryValve.java

@@ -62,7 +62,7 @@
 @ToString
 @Loggable(Loggable.DEBUG)
 @EqualsAndHashCode(of = { "limit", "forward" })
-@SuppressWarnings("PMD.TooManyMethods")
+@SuppressWarnings({"PMD.TooManyMethods", "PMD.GuardLogStatement"})
 public final class QueryValve implements Valve {
 
     /**
@@ -339,6 +339,8 @@ public QueryValve withAttributesToGet(final String... names) {
 
     /**
      * Next dosage.
+     *
+     * @since 0.1
      */
     @ToString
     @Loggable(Loggable.DEBUG)
@@ -348,14 +350,17 @@ private final class NextDosage implements Dosage {
          * AWS client.
          */
         private final transient Credentials credentials;
+
         /**
          * Query request.
          */
         private final transient QueryRequest request;
+
         /**
          * Query request.
          */
         private final transient QueryResult result;
+
         /**
          * Public ctor.
          * @param creds Credentials
@@ -368,14 +373,17 @@ private final class NextDosage implements Dosage {
             this.request = rqst;
             this.result = rslt;
         }
+
         @Override
         public List<Map<String, AttributeValue>> items() {
             return this.result.getItems();
         }
+
         @Override
         public boolean hasNext() {
             return this.result.getLastEvaluatedKey() != null;
         }
+
         @Override
         public Dosage next() {
             if (!this.hasNext()) {

src/main/java/com/jcabi/dynamo/Region.java

@@ -74,6 +74,8 @@ public interface Region {
 
     /**
      * Simple region, basic implementation.
+     *
+     * @since 0.1
      */
     @Immutable
     @Loggable(Loggable.DEBUG)
@@ -84,17 +86,20 @@ final class Simple implements Region {
          * Credentials.
          */
         private final transient Credentials credentials;
+
         /**
          * Public ctor.
          * @param creds Credentials
          */
         public Simple(final Credentials creds) {
             this.credentials = creds;
         }
+
         @Override
         public AmazonDynamoDB aws() {
             return this.credentials.aws();
         }
+
         @Override
         public Table table(final String name) {
             return new AwsTable(this.credentials, this, name);
@@ -116,6 +121,8 @@ public Table table(final String name) {
      * instance pointing to the Dynamo DB table named {@code "foo-test"}. Could
      * be a convenient mechanism when you have many tables for different
      * projects in the same region.
+     *
+     * @since 0.1
      */
     @Immutable
     @Loggable(Loggable.DEBUG)
@@ -126,10 +133,12 @@ final class Prefixed implements Region {
          * Original region.
          */
         private final transient Region origin;
+
         /**
          * Prefix to add.
          */
         private final transient String prefix;
+
         /**
          * Public ctor.
          * @param region Original region
@@ -139,10 +148,12 @@ public Prefixed(final Region region, final String pfx) {
             this.origin = region;
             this.prefix = pfx;
         }
+
         @Override
         public AmazonDynamoDB aws() {
             return this.origin.aws();
         }
+
         @Override
         public Table table(final String name) {
             return this.origin.table(