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src/jdk.jextract/share/classes/com/sun/tools/jextract/TreeFilter.java

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  17  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
  18  *
  19  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
  20  * or visit www.oracle.com if you need additional information or have any
  21  * questions.
  22  */
  23 package com.sun.tools.jextract;
  24 
  25 import java.nio.file.Path;
  26 import java.nio.file.Paths;
  27 import java.util.ArrayList;
  28 import java.util.List;
  29 import java.util.function.Predicate;
  30 import java.util.stream.Collectors;
  31 import com.sun.tools.jextract.parser.Parser;
  32 import com.sun.tools.jextract.tree.FunctionTree;
  33 import com.sun.tools.jextract.tree.HeaderTree;
  34 import com.sun.tools.jextract.tree.MacroTree;
  35 import com.sun.tools.jextract.tree.SimpleTreeVisitor;
  36 import com.sun.tools.jextract.tree.Tree;

  37 import com.sun.tools.jextract.tree.VarTree;
  38 import com.sun.tools.jextract.tree.TreeMaker;
  39 import com.sun.tools.jextract.tree.TreePrinter;
  40 
  41 /**
  42  * This visitor filters variable, function, macro trees
  43  * based on a Tree Predicate initialized.
  44  */
  45 final class TreeFilter extends SimpleTreeVisitor<Tree, Void> {

  46     private final TreeMaker treeMaker = new TreeMaker();
  47     private final Predicate<Tree> filter;
  48 
  49     TreeFilter(Predicate<Tree> filter) {
  50         this.filter = filter;
  51     }
  52 
  53     private Tree filterTree(Tree tree) {
  54         return filter.test(tree)? tree : null;
  55     }
  56 
  57     HeaderTree transform(HeaderTree ht) {

  58         return (HeaderTree)ht.accept(this, null);
  59     }
  60 
  61     @Override
  62     public Tree defaultAction(Tree tree, Void v) {
  63         return tree;
  64     }
  65 
  66     @Override
  67     public Tree visitFunction(FunctionTree ft, Void v) {
  68         return filterTree(ft);
  69     }
  70 
  71     @Override
  72     public Tree visitMacro(MacroTree mt, Void v) {
  73         return filterTree(mt);
  74     }
  75 
  76     @Override
  77     public Tree visitHeader(HeaderTree ht, Void v) {




  17  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
  18  *
  19  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
  20  * or visit www.oracle.com if you need additional information or have any
  21  * questions.
  22  */
  23 package com.sun.tools.jextract;
  24 
  25 import java.nio.file.Path;
  26 import java.nio.file.Paths;
  27 import java.util.ArrayList;
  28 import java.util.List;
  29 import java.util.function.Predicate;
  30 import java.util.stream.Collectors;
  31 import com.sun.tools.jextract.parser.Parser;
  32 import com.sun.tools.jextract.tree.FunctionTree;
  33 import com.sun.tools.jextract.tree.HeaderTree;
  34 import com.sun.tools.jextract.tree.MacroTree;
  35 import com.sun.tools.jextract.tree.SimpleTreeVisitor;
  36 import com.sun.tools.jextract.tree.Tree;
  37 import com.sun.tools.jextract.tree.TreePhase;
  38 import com.sun.tools.jextract.tree.VarTree;
  39 import com.sun.tools.jextract.tree.TreeMaker;
  40 import com.sun.tools.jextract.tree.TreePrinter;
  41 
  42 /**
  43  * This visitor filters variable, function, macro trees
  44  * based on a Tree Predicate initialized.
  45  */
  46 final class TreeFilter extends SimpleTreeVisitor<Tree, Void>
  47         implements TreePhase {
  48     private final TreeMaker treeMaker = new TreeMaker();
  49     private final Predicate<Tree> filter;
  50 
  51     TreeFilter(Predicate<Tree> filter) {
  52         this.filter = filter;
  53     }
  54 
  55     private Tree filterTree(Tree tree) {
  56         return filter.test(tree)? tree : null;
  57     }
  58 
  59     @Override
  60     public HeaderTree transform(HeaderTree ht) {
  61         return (HeaderTree)ht.accept(this, null);
  62     }
  63 
  64     @Override
  65     public Tree defaultAction(Tree tree, Void v) {
  66         return tree;
  67     }
  68 
  69     @Override
  70     public Tree visitFunction(FunctionTree ft, Void v) {
  71         return filterTree(ft);
  72     }
  73 
  74     @Override
  75     public Tree visitMacro(MacroTree mt, Void v) {
  76         return filterTree(mt);
  77     }
  78 
  79     @Override
  80     public Tree visitHeader(HeaderTree ht, Void v) {


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