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    1   /**
    2    * BSD-style license; for more info see http://pmd.sourceforge.net/license.html
    3    */
    4   package net.sourceforge.pmd.typeresolution.rules.imports;
    5
    6   import net.sourceforge.pmd.ast.ASTImportDeclaration;
    7   import net.sourceforge.pmd.ast.ASTName;
    8   import net.sourceforge.pmd.ast.SimpleJavaNode;
    9   import net.sourceforge.pmd.ast.SimpleNode;
    10  import net.sourceforge.pmd.ast.TypeNode;
    11  import net.sourceforge.pmd.rules.ImportWrapper;
    12  import net.sourceforge.pmd.rules.imports.UnusedImportsRule;
    13
    14  public class UnusedImports extends UnusedImportsRule {
    15
    16      public Object visit(ASTImportDeclaration node, Object data) {
    17          if (node.isImportOnDemand()) {
    18              ASTName importedType = (ASTName) node.jjtGetChild(0);
    19              imports.add(new ImportWrapper(importedType.getImage(), null, node));
    20          } else {
    21              super.visit(node, data);
    22          }
    23          return data;
    24      }
    25
    26      protected void check(SimpleNode node) {
    27          if (imports.isEmpty()) {
    28              return;
    29          }
    30          ImportWrapper candidate = getImportWrapper(node);
    31          if (imports.contains(candidate)) {
    32              imports.remove(candidate);
    33              return;
    34          }
    35          if (TypeNode.class.isAssignableFrom(node.getClass()) && ((TypeNode) node).getType() != null) {
    36              Class c = ((TypeNode) node).getType();
    37              if (c.getPackage() != null) {
    38  	            candidate = new ImportWrapper(c.getPackage().getName(), null, new SimpleJavaNode(-1));
    39  	            if (imports.contains(candidate)) {
    40  	                imports.remove(candidate);
    41  	            }
    42              }
    43          }
    44      }
    45  }