Add null-ptr-check on UrlDetector & InputTextReader

url-detector/build.gradle

@@ -1,3 +1,9 @@
 apply plugin: 'java'
 apply plugin: 'idea'
 
+dependencies {
+    sourceCompatibility = 1.7
+    targetCompatibility = 1.7
+
+    compile 'org.apache.commons:commons-lang3:3.4'
+}

url-detector/src/main/java/com/linkedin/urls/detection/InputTextReader.java

@@ -42,8 +42,13 @@ public class InputTextReader {
   /**
    * Creates a new instance of the InputTextReader using the content to read.
    * @param content The content to read.
+   * @throws {@link NullPointerException} if {@code content == null} .
    */
-  public InputTextReader(String content) {
+  public InputTextReader(String content) throws NullPointerException {
+    if (content == null) {
+      throw new NullPointerException("content must't be null.");
+    }
+
     _content = content.toCharArray();
   }
 

url-detector/src/main/java/com/linkedin/urls/detection/UrlDetector.java

@@ -12,6 +12,7 @@
 import com.linkedin.urls.Url;
 import com.linkedin.urls.UrlMarker;
 import com.linkedin.urls.UrlPart;
+
 import java.util.ArrayList;
 import java.util.Arrays;
 import java.util.Collections;
@@ -119,8 +120,13 @@ public enum ReadEndState {
    * Creates a new UrlDetector object used to find urls inside of text.
    * @param content The content to search inside of.
    * @param options The UrlDetectorOptions to use when detecting the content.
+   * @throws {@link NullPointerException} if {@code content == null} .
    */
-  public UrlDetector(String content, UrlDetectorOptions options) {
+  public UrlDetector(String content, UrlDetectorOptions options) throws NullPointerException {
+    if (content == null) {
+      throw new NullPointerException("content must't be null.");
+    }
+
     _reader = new InputTextReader(content);
     _options = options;
   }