Add some CheckForNull and Nullable annotations

sonar-core/src/main/java/org/sonar/core/i18n/I18nManager.java

@@ -31,17 +31,13 @@ import org.sonar.api.platform.PluginMetadata;
 import org.sonar.api.platform.PluginRepository;
 import org.sonar.api.utils.SonarException;
 
+import javax.annotation.CheckForNull;
 import javax.annotation.Nullable;
 
 import java.io.IOException;
 import java.io.InputStream;
 import java.text.MessageFormat;
-import java.util.Enumeration;
-import java.util.Locale;
-import java.util.Map;
-import java.util.MissingResourceException;
-import java.util.ResourceBundle;
-import java.util.Set;
+import java.util.*;
 
 public class I18nManager implements I18n, ServerExtension, BatchExtension {
   private static final Logger LOG = LoggerFactory.getLogger(I18nManager.class);
@@ -87,7 +83,8 @@ public class I18nManager implements I18n, ServerExtension, BatchExtension {
     fileContentCache=null;
   }
 
-  public String message(Locale locale, String key, String defaultValue, Object... parameters) {
+  @CheckForNull
+  public String message(Locale locale, String key, @Nullable String defaultValue, Object... parameters) {
     String bundleKey = propertyToBundles.get(key);
     String value = null;
     if (bundleKey != null) {
@@ -159,6 +156,7 @@ public class I18nManager implements I18n, ServerExtension, BatchExtension {
     return propertyToBundles.keySet();
   }
 
+  @CheckForNull
   private String formatMessage(@Nullable String message, Object... parameters) {
     if (message == null || parameters.length == 0) {
       return message;

sonar-core/src/main/java/org/sonar/core/i18n/RuleI18nManager.java

@@ -26,6 +26,8 @@ import org.sonar.api.ServerExtension;
 import org.sonar.api.i18n.RuleI18n;
 import org.sonar.api.rules.Rule;
 
+import javax.annotation.CheckForNull;
+
 import java.util.List;
 import java.util.Locale;
 
@@ -51,10 +53,12 @@ public class RuleI18nManager implements RuleI18n, ServerExtension, BatchExtensio
     this.ruleKeys = list.toArray(new RuleKey[list.size()]);
   }
 
+  @CheckForNull
   public String getName(String repositoryKey, String ruleKey, Locale locale) {
     return message(repositoryKey, ruleKey, locale, NAME_SUFFIX);
   }
 
+  @CheckForNull
   public String getName(Rule rule, Locale locale) {
     String name = message(rule.getRepositoryKey(), rule.getKey(), locale, NAME_SUFFIX);
     return name != null ? name : rule.getName();
@@ -92,10 +96,12 @@ public class RuleI18nManager implements RuleI18n, ServerExtension, BatchExtensio
     return description;
   }
 
+  @CheckForNull
   public String getParamDescription(String repositoryKey, String ruleKey, String paramKey, Locale locale) {
     return message(repositoryKey, ruleKey, locale, ".param." + paramKey);
   }
 
+  @CheckForNull
   String message(String repositoryKey, String ruleKey, Locale locale, String suffix) {
     String propertyKey = new StringBuilder().append(RULE_PREFIX).append(repositoryKey).append(".").append(ruleKey).append(suffix).toString();
     return i18nManager.message(locale, propertyKey, null);

sonar-core/src/main/java/org/sonar/core/i18n/package-info.java

@@ -0,0 +1,23 @@
+/*
+ * SonarQube, open source software quality management tool.
+ * Copyright (C) 2008-2013 SonarSource
+ * mailto:contact AT sonarsource DOT com
+ *
+ * SonarQube is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 3 of the License, or (at your option) any later version.
+ *
+ * SonarQube is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public License
+ * along with this program; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
+ */
+@ParametersAreNonnullByDefault
+package org.sonar.core.i18n;
+
+import javax.annotation.ParametersAreNonnullByDefault;

sonar-plugin-api/src/main/java/org/sonar/api/i18n/I18n.java

@@ -22,6 +22,9 @@ package org.sonar.api.i18n;
 import org.sonar.api.BatchComponent;
 import org.sonar.api.ServerComponent;
 
+import javax.annotation.CheckForNull;
+import javax.annotation.Nullable;
+
 import java.util.Locale;
 
 /**
@@ -45,6 +48,7 @@ public interface I18n extends ServerComponent, BatchComponent {
    * @param parameters the parameters used to format the message from the translated pattern.
    * @return the message formatted with the translated pattern and the given parameters
    */
-  String message(final Locale locale, final String key, final String defaultValue, final Object... parameters);
+  @CheckForNull
+  String message(final Locale locale, final String key, @Nullable final String defaultValue, final Object... parameters);
 
 }

sonar-plugin-api/src/main/java/org/sonar/api/i18n/RuleI18n.java

@@ -23,6 +23,8 @@ import org.sonar.api.BatchComponent;
 import org.sonar.api.ServerComponent;
 import org.sonar.api.rules.Rule;
 
+import javax.annotation.CheckForNull;
+
 import java.util.Locale;
 
 /**
@@ -43,6 +45,7 @@ public interface RuleI18n extends ServerComponent, BatchComponent {
    * @param locale the locale to translate into
    * @return the translated name of the rule, or the default English one if the given locale is not supported, or null
    */
+  @CheckForNull
   String getName(String repositoryKey, String ruleKey, Locale locale);
 
   /**
@@ -55,6 +58,7 @@ public interface RuleI18n extends ServerComponent, BatchComponent {
    * @param locale the locale to translate into
    * @return the translated name of the rule, or the default English one if the given locale is not supported, or the rule name.
    */
+  @CheckForNull
   String getName(Rule rule, Locale locale);
 
   /**
@@ -83,6 +87,7 @@ public interface RuleI18n extends ServerComponent, BatchComponent {
    * @return the translated name of the rule parameter, or the default English one if the given locale is not supported, or null if
    *         no translation can be found.
    */
+  @CheckForNull
   String getParamDescription(String repositoryKey, String ruleKey, String paramKey, Locale locale);
 
 }

sonar-plugin-api/src/main/java/org/sonar/api/i18n/package-info.java

@@ -0,0 +1,23 @@
+/*
+ * SonarQube, open source software quality management tool.
+ * Copyright (C) 2008-2013 SonarSource
+ * mailto:contact AT sonarsource DOT com
+ *
+ * SonarQube is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 3 of the License, or (at your option) any later version.
+ *
+ * SonarQube is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public License
+ * along with this program; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
+ */
+@ParametersAreNonnullByDefault
+package org.sonar.api.i18n;
+
+import javax.annotation.ParametersAreNonnullByDefault;

sonar-plugin-api/src/main/java/org/sonar/api/rules/Rule.java

@@ -32,6 +32,8 @@ import org.sonar.api.rule.RuleKey;
 import org.sonar.api.utils.SonarException;
 import org.sonar.check.Cardinality;
 
+import javax.annotation.CheckForNull;
+import javax.annotation.Nullable;
 import javax.persistence.*;
 
 import java.util.ArrayList;
@@ -205,6 +207,7 @@ public final class Rule {
     this.id = id;
   }
 
+  @CheckForNull
   public String getName() {
     return name;
   }
@@ -212,7 +215,7 @@ public final class Rule {
   /**
    * Sets the rule name
    */
-  public Rule setName(String name) {
+  public Rule setName(@Nullable String name) {
     this.name = removeNewLineCharacters(name);
     return this;
   }
@@ -504,7 +507,8 @@ public final class Rule {
       .toString();
   }
 
-  private String removeNewLineCharacters(String text) {
+  @CheckForNull
+  private String removeNewLineCharacters(@Nullable String text) {
     String removedCRLF = StringUtils.remove(text, "\n");
     removedCRLF = StringUtils.remove(removedCRLF, "\r");
     removedCRLF = StringUtils.remove(removedCRLF, "\n\r");

sonar-server/src/main/java/org/sonar/server/rule/RubyRuleService.java

@@ -25,6 +25,8 @@ import org.sonar.api.rules.Rule;
 import org.sonar.core.i18n.RuleI18nManager;
 import org.sonar.server.user.UserSession;
 
+import javax.annotation.CheckForNull;
+
 /**
  * Used through ruby code <pre>Internal.rules</pre>
  */
@@ -36,6 +38,7 @@ public class RubyRuleService implements ServerComponent, Startable {
     this.i18n = i18n;
   }
 
+  @CheckForNull
   public String ruleL10nName(Rule rule) {
     String name = i18n.getName(rule.getRepositoryKey(), rule.getKey(), UserSession.get().locale());
     if (name == null) {

sonar-server/src/main/java/org/sonar/server/rule/package-info.java

@@ -0,0 +1,23 @@
+/*
+ * SonarQube, open source software quality management tool.
+ * Copyright (C) 2008-2013 SonarSource
+ * mailto:contact AT sonarsource DOT com
+ *
+ * SonarQube is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 3 of the License, or (at your option) any later version.
+ *
+ * SonarQube is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public License
+ * along with this program; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
+ */
+@ParametersAreNonnullByDefault
+package org.sonar.server.rule;
+
+import javax.annotation.ParametersAreNonnullByDefault;