Removed unused code and reduce visibility where possible.

h2/src/main/org/h2/expression/Condition.java

@@ -12,7 +12,7 @@ import org.h2.value.ValueBoolean;
 /**
  * Represents a condition returning a boolean value, or NULL.
  */
-public abstract class Condition extends Expression {
+abstract class Condition extends Expression {
 
     public int getType() {
         return Value.BOOLEAN;

h2/src/main/org/h2/expression/ConditionIn.java

@@ -177,7 +177,7 @@ public class ConditionIn extends Condition {
      * @param other the second condition
      * @return null if the condition was not added, or the new condition
      */
-    public Expression getAdditional(Session session, Comparison other) {
+    Expression getAdditional(Session session, Comparison other) {
         Expression add = other.getIfEquals(left);
         if (add != null) {
             valueList.add(add);

h2/src/main/org/h2/expression/Expression.java

@@ -304,7 +304,7 @@ public abstract class Expression {
      * @param value the value to extract columns from
      * @return array of expression columns
      */
-    public static Expression[] getExpressionColumns(Session session, ValueArray value) {
+    static Expression[] getExpressionColumns(Session session, ValueArray value) {
         Value[] list = value.getList();
         ExpressionColumn[] expr = new ExpressionColumn[list.length];
         for (int i = 0, len = list.length; i < len; i++) {

h2/src/main/org/h2/expression/ExpressionVisitor.java

@@ -156,7 +156,7 @@ public class ExpressionVisitor {
      * @param resolver the resolver
      * @return the new visitor
      */
-    public static ExpressionVisitor getNotFromResolverVisitor(ColumnResolver resolver) {
+    static ExpressionVisitor getNotFromResolverVisitor(ColumnResolver resolver) {
         return new ExpressionVisitor(NOT_FROM_RESOLVER, 0, null, null, null, resolver, null);
     }
 
@@ -190,7 +190,7 @@ public class ExpressionVisitor {
      *
      * @param column the additional column.
      */
-    public void addColumn(Column column) {
+    void addColumn(Column column) {
         columns.add(column);
     }
 

h2/src/main/org/h2/expression/Function.java

@@ -364,7 +364,7 @@ public class Function extends Expression implements FunctionCall {
      * @param name the function name
      * @return the function info
      */
-    public static FunctionInfo getFunctionInfo(String name) {
+    private static FunctionInfo getFunctionInfo(String name) {
         return FUNCTIONS.get(name);
     }
 
@@ -1613,21 +1613,6 @@ public class Function extends Expression implements FunctionCall {
         }
     }
 
-    /**
-     * Set the result data type of this function.
-     *
-     * @param dataType the data type
-     * @param precision the precision
-     * @param scale the scale
-     * @param displaySize the display size
-     */
-    public void setDataType(int dataType, long precision, int scale, int displaySize) {
-        this.dataType = dataType;
-        this.precision = precision;
-        this.displaySize = displaySize;
-        this.scale = scale;
-    }
-
     public void setDataType(Column col) {
         dataType = col.getType();
         precision = col.getPrecision();