From 30788adc503bdd4e1250437d0406cdad705f18b1 Mon Sep 17 00:00:00 2001
From: Tomas Bjerre <tomas.bjerre85@gmail.com>
Date: Fri, 17 Mar 2017 15:09:58 +0100
Subject: [PATCH] Adding filtering util

---
 .../bjurr/violations/lib/util/Filtering.java  | 32 ++++++++
 .../violations/lib/util/FilteringTest.java    | 79 +++++++++++++++++++
 2 files changed, 111 insertions(+)
 create mode 100644 src/main/java/se/bjurr/violations/lib/util/Filtering.java
 create mode 100644 src/test/java/se/bjurr/violations/lib/util/FilteringTest.java

diff --git a/src/main/java/se/bjurr/violations/lib/util/Filtering.java b/src/main/java/se/bjurr/violations/lib/util/Filtering.java
new file mode 100644
index 00000000..cff5fe78
--- /dev/null
+++ b/src/main/java/se/bjurr/violations/lib/util/Filtering.java
@@ -0,0 +1,32 @@
+package se.bjurr.violations.lib.util;
+
+import static se.bjurr.violations.lib.model.SEVERITY.ERROR;
+import static se.bjurr.violations.lib.model.SEVERITY.INFO;
+import static se.bjurr.violations.lib.model.SEVERITY.WARN;
+
+import java.util.ArrayList;
+import java.util.List;
+
+import se.bjurr.violations.lib.model.SEVERITY;
+import se.bjurr.violations.lib.model.Violation;
+
+public final class Filtering {
+  private Filtering() {
+  }
+  public static List<Violation> withAtLEastSeverity(List<Violation> unfiltered, final SEVERITY severity) {
+List<Violation> filtered = new ArrayList<>();
+for (Violation candidate : unfiltered) {
+  if (isSeverer(candidate.getSeverity(),severity)) {
+    filtered.add(candidate);
+  }
+}
+return filtered ;
+   }
+
+  private static boolean isSeverer(SEVERITY candiate,SEVERITY  atLeast) {
+    return candiate == ERROR//
+        ||  atLeast == INFO//
+        || candiate == WARN && atLeast == WARN;
+        }
+
+}
diff --git a/src/test/java/se/bjurr/violations/lib/util/FilteringTest.java b/src/test/java/se/bjurr/violations/lib/util/FilteringTest.java
new file mode 100644
index 00000000..674f508b
--- /dev/null
+++ b/src/test/java/se/bjurr/violations/lib/util/FilteringTest.java
@@ -0,0 +1,79 @@
+package se.bjurr.violations.lib.util;
+
+import static org.assertj.core.api.Assertions.assertThat;
+import static org.assertj.core.util.Lists.newArrayList;
+import static se.bjurr.violations.lib.model.SEVERITY.ERROR;
+import static se.bjurr.violations.lib.model.SEVERITY.INFO;
+import static se.bjurr.violations.lib.model.SEVERITY.WARN;
+import static se.bjurr.violations.lib.model.Violation.violationBuilder;
+import static se.bjurr.violations.lib.reports.Reporter.CHECKSTYLE;
+
+import java.util.List;
+
+import org.junit.Test;
+
+import se.bjurr.violations.lib.model.Violation;
+
+public class FilteringTest {
+
+  @Test
+  public void testFilteringINFO() {
+    List<Violation> unfiltered = newArrayList(//
+        violationBuilder()//
+            .setFile("file")//
+            .setStartLine(2)//
+            .setMessage("message")//
+            .setReporter(CHECKSTYLE)//
+            .setSeverity(INFO)//
+            .build()//
+    );
+
+    assertThat(Filtering.withAtLEastSeverity(unfiltered, ERROR))//
+        .hasSize(0);
+    assertThat(Filtering.withAtLEastSeverity(unfiltered, WARN))//
+        .hasSize(0);
+    assertThat(Filtering.withAtLEastSeverity(unfiltered, INFO))//
+        .hasSize(1);
+  }
+
+  @Test
+  public void testFilteringWARN() {
+    List<Violation> unfiltered = newArrayList(//
+        violationBuilder()//
+            .setFile("file")//
+            .setStartLine(2)//
+            .setMessage("message")//
+            .setReporter(CHECKSTYLE)//
+            .setSeverity(WARN)//
+            .build()//
+    );
+
+    assertThat(Filtering.withAtLEastSeverity(unfiltered, ERROR))//
+        .hasSize(0);
+    assertThat(Filtering.withAtLEastSeverity(unfiltered, WARN))//
+        .hasSize(1);
+    assertThat(Filtering.withAtLEastSeverity(unfiltered, INFO))//
+        .hasSize(1);
+  }
+
+  @Test
+  public void testFilteringERROR() {
+    List<Violation> unfiltered = newArrayList(//
+        violationBuilder()//
+            .setFile("file")//
+            .setStartLine(2)//
+            .setMessage("message")//
+            .setReporter(CHECKSTYLE)//
+            .setSeverity(ERROR)//
+            .build()//
+    );
+
+    assertThat(Filtering.withAtLEastSeverity(unfiltered, ERROR))//
+        .hasSize(1);
+    assertThat(Filtering.withAtLEastSeverity(unfiltered, WARN))//
+        .hasSize(1);
+    assertThat(Filtering.withAtLEastSeverity(unfiltered, INFO))//
+        .hasSize(1);
+  }
+
+}