Introduced AggressiveHardCodedPurity under registry key (IDEA-CR-21434)

New key = java.annotations.inference.aggressive.hardcoded.purity (true
by default). Implies purity for Object.toString(), Iterable.iterator(),
Iterator.hasNext() and this-changing Iterator.next(). Parameter-changing
 mode supported for hardcoded purity.

java/java-tests/testData/codeInspection/bytecodeAnalysis/annotations/org/apache/commons/collections/annotations.xml

@@ -51,6 +51,11 @@
     <item name='org.apache.commons.collections.ExtendedProperties java.lang.String unescape(java.lang.String) 0'>
         <annotation name='org.jetbrains.annotations.NotNull'/>
     </item>
+    <item name='org.apache.commons.collections.ExtendedProperties java.util.Iterator getKeys()'>
+        <annotation name='org.jetbrains.annotations.Contract'>
+            <val name="pure" val="true"/>
+        </annotation>
+    </item>
     <item name='org.apache.commons.collections.ExtendedProperties org.apache.commons.collections.ExtendedProperties convertProperties(java.util.Properties) 0'>
         <annotation name='org.jetbrains.annotations.NotNull'/>
     </item>

java/java-tests/testData/codeInspection/bytecodeAnalysis/annotations/org/apache/commons/lang/annotations.xml

@@ -1543,6 +1543,11 @@
     <item name='org.apache.commons.lang.CharSet CharSet(java.lang.String[]) 0'>
         <annotation name='org.jetbrains.annotations.NotNull'/>
     </item>
+    <item name='org.apache.commons.lang.CharSet boolean contains(char)'>
+        <annotation name='org.jetbrains.annotations.Contract'>
+            <val name="pure" val="true"/>
+        </annotation>
+    </item>
     <item name='org.apache.commons.lang.CharSet boolean equals(java.lang.Object) 0'>
         <annotation name='org.jetbrains.annotations.Nullable'/>
     </item>
@@ -3315,7 +3320,8 @@
     </item>
     <item name='org.apache.commons.lang.StringUtils java.lang.String join(java.util.Collection, char)'>
         <annotation name='org.jetbrains.annotations.Contract'>
-            <val val="&quot;null,_-&gt;null&quot;"/>
+            <val name="value" val="&quot;null,_-&gt;null&quot;"/>
+            <val name="pure" val="true"/>
         </annotation>
         <annotation name='org.jetbrains.annotations.Nullable'/>
     </item>
@@ -3324,7 +3330,8 @@
     </item>
     <item name='org.apache.commons.lang.StringUtils java.lang.String join(java.util.Collection, java.lang.String)'>
         <annotation name='org.jetbrains.annotations.Contract'>
-            <val val="&quot;null,_-&gt;null&quot;"/>
+            <val name="value" val="&quot;null,_-&gt;null&quot;"/>
+            <val name="pure" val="true"/>
         </annotation>
         <annotation name='org.jetbrains.annotations.Nullable'/>
     </item>
@@ -4137,9 +4144,19 @@
     <item name='org.apache.commons.lang.Validate void noNullElements(java.lang.Object[], java.lang.String) 0'>
         <annotation name='org.jetbrains.annotations.NotNull'/>
     </item>
+    <item name='org.apache.commons.lang.Validate void noNullElements(java.util.Collection)'>
+        <annotation name='org.jetbrains.annotations.Contract'>
+            <val name="pure" val="true"/>
+        </annotation>
+    </item>
     <item name='org.apache.commons.lang.Validate void noNullElements(java.util.Collection) 0'>
         <annotation name='org.jetbrains.annotations.NotNull'/>
     </item>
+    <item name='org.apache.commons.lang.Validate void noNullElements(java.util.Collection, java.lang.String)'>
+        <annotation name='org.jetbrains.annotations.Contract'>
+            <val name="pure" val="true"/>
+        </annotation>
+    </item>
     <item name='org.apache.commons.lang.Validate void noNullElements(java.util.Collection, java.lang.String) 0'>
         <annotation name='org.jetbrains.annotations.NotNull'/>
     </item>

java/java-tests/testData/codeInspection/bytecodeAnalysis/annotations/org/apache/velocity/anakia/annotations.xml

@@ -90,6 +90,11 @@
             <val name="pure" val="true"/>
         </annotation>
     </item>
+    <item name='org.apache.velocity.anakia.NodeList java.util.Iterator iterator()'>
+        <annotation name='org.jetbrains.annotations.Contract'>
+            <val name="pure" val="true"/>
+        </annotation>
+    </item>
     <item name='org.apache.velocity.anakia.NodeList java.util.List getList()'>
         <annotation name='org.jetbrains.annotations.Contract'>
             <val name="pure" val="true"/>

java/java-tests/testData/codeInspection/bytecodeAnalysis/annotations/org/apache/velocity/app/event/annotations.xml

@@ -23,6 +23,26 @@
     <item name='org.apache.velocity.app.event.EventCartridge boolean removeEventHandler(org.apache.velocity.app.event.EventHandler) 0'>
         <annotation name='org.jetbrains.annotations.Nullable'/>
     </item>
+    <item name='org.apache.velocity.app.event.EventCartridge java.util.Iterator getIncludeEventHandlers()'>
+        <annotation name='org.jetbrains.annotations.Contract'>
+            <val name="pure" val="true"/>
+        </annotation>
+    </item>
+    <item name='org.apache.velocity.app.event.EventCartridge java.util.Iterator getInvalidReferenceEventHandlers()'>
+        <annotation name='org.jetbrains.annotations.Contract'>
+            <val name="pure" val="true"/>
+        </annotation>
+    </item>
+    <item name='org.apache.velocity.app.event.EventCartridge java.util.Iterator getMethodExceptionEventHandlers()'>
+        <annotation name='org.jetbrains.annotations.Contract'>
+            <val name="pure" val="true"/>
+        </annotation>
+    </item>
+    <item name='org.apache.velocity.app.event.EventCartridge java.util.Iterator getNullSetEventHandlers()'>
+        <annotation name='org.jetbrains.annotations.Contract'>
+            <val name="pure" val="true"/>
+        </annotation>
+    </item>
     <item name='org.apache.velocity.app.event.EventCartridge java.util.Iterator getReferenceInsertionEventHandlers()'>
         <annotation name='org.jetbrains.annotations.Nullable'/>
     </item>