refactoring

Author: raydac

src/main/java/com/igormaznitsa/prologparser/PrologParser.java

@@ -432,7 +432,7 @@ private PrologTerm readBlock(final Koi7CharOpMap endOperators) {
             readAtom = readOperators.findSimilar(leftPresented, rightPresented);
 
             if (readAtom == null) {
-              if (currentTreeItem == null && !(leftPresented || rightPresented)) {
+              if (currentTreeItem == null && !rightPresented) {
                 // alone operator, it is an atom
                 return new PrologAtom(readOperators.getText(), Quotation.SINGLE, readOperators.getLine(), readOperators.getPos());
               }
@@ -455,7 +455,6 @@ private PrologTerm readBlock(final Koi7CharOpMap endOperators) {
                   readAtom = readList(readAtomContainer);
                   readAtom.setPos(readAtomContainer.getPos());
                   readAtom.setLine(readAtomContainer.getLine());
-                  readAtomPrecedence = 0;
                 }
                 break;
                 case '{':

src/main/java/com/igormaznitsa/prologparser/terms/PrologInt.java

@@ -110,6 +110,10 @@ public Number getNumber() {
     return this.value;
   }
 
+  /**
+   * Get the value as BigInteger
+   * @return the value as BigInteger
+   */
   public BigInteger getIntValue() {
     return this.value;
   }

src/main/java/com/igormaznitsa/prologparser/terms/PrologList.java

@@ -115,28 +115,49 @@ public boolean isEmpty() {
     return this.elements[0] == null && this.elements[1] == null;
   }
 
+  /**
+   * Get the current head element of the list.
+   * @return the head element, can be null
+   */
   public PrologTerm getHead() {
     return this.elements[0];
   }
 
+  /**
+   * Replace the head element.
+   * @param term the new head term, can be null
+   */
   public void setHead(final PrologTerm term) {
     this.setElementAt(0, term);
     if (this.elements[1] == null) {
       setTail(new PrologList());
     }
   }
 
+  /**
+   * Get the current tail element
+   * @return the current tail element, can be null
+   */
   public PrologTerm getTail() {
     return this.elements[1];
   }
 
+  /**
+   * Set the current tail element
+   * @param term the new tail element, can be null
+   */
   public void setTail(final PrologTerm term) {
     this.setElementAt(1, term);
     if (this.elements[0] == null) {
       setHead(EMPTY_ATOM);
     }
   }
 
+  /**
+   * Add term as new list into the end of the list chain.
+   * @param term to be added as new list in the end of chain
+   * @return generated list (may be this)
+   */
   public PrologList addAsNewListToEndOfListChain(final PrologTerm term) {
 
     PrologList result = this;

src/main/java/com/igormaznitsa/prologparser/utils/StringUtils.java

@@ -26,7 +26,6 @@
 /**
  * Miscelaneous utils to work with strings.
  */
-@SuppressWarnings("serial")
 public final class StringUtils {
 
   private StringUtils() {