import org.apache.lucene.queryparser.flexible.standard.nodes.WildcardQueryNode; //导入依赖的package包/类
@Override
protected QueryNode postProcessNode(QueryNode node) throws QueryNodeException {
  
  Locale locale = getQueryConfigHandler().get(ConfigurationKeys.LOCALE);
  if (locale == null) {
    locale = Locale.getDefault();
  }

  if (node instanceof WildcardQueryNode
      || node instanceof FuzzyQueryNode
      || (node instanceof FieldQueryNode && node.getParent() instanceof RangeQueryNode)
      || node instanceof RegexpQueryNode) {

    TextableQueryNode txtNode = (TextableQueryNode) node;
    CharSequence text = txtNode.getText();
    txtNode.setText(text != null ? UnescapedCharSequence.toLowerCase(text, locale) : null);
  }

  return node;

}
 

import org.apache.lucene.queryparser.flexible.standard.nodes.WildcardQueryNode; //导入依赖的package包/类
@Override
protected QueryNode postProcessNode(QueryNode node) throws QueryNodeException {

  if (node instanceof WildcardQueryNode) {
    WildcardQueryNode wildcardNode = (WildcardQueryNode) node;

    if (wildcardNode.getText().length() > 0) {
      
      // Validate if the wildcard was escaped
      if (UnescapedCharSequence.wasEscaped(wildcardNode.getText(), 0))
        return node;
      
      switch (wildcardNode.getText().charAt(0)) {    
        case '*':
        case '?':
          throw new QueryNodeException(new MessageImpl(
              QueryParserMessages.LEADING_WILDCARD_NOT_ALLOWED, node
                  .toQueryString(new EscapeQuerySyntaxImpl())));    
      }
    }

  }

  return node;

}
 

import org.apache.lucene.queryparser.flexible.standard.nodes.WildcardQueryNode; //导入依赖的package包/类
@Override
protected QueryNode postProcessNode(QueryNode node) {

  // set setMultiTermRewriteMethod for WildcardQueryNode and
  // PrefixWildcardQueryNode
  if (node instanceof WildcardQueryNode
      || node instanceof AbstractRangeQueryNode || node instanceof RegexpQueryNode) {
    
    MultiTermQuery.RewriteMethod rewriteMethod = getQueryConfigHandler().get(ConfigurationKeys.MULTI_TERM_REWRITE_METHOD);

    if (rewriteMethod == null) {
      // This should not happen, this configuration is set in the
      // StandardQueryConfigHandler
      throw new IllegalArgumentException(
          "StandardQueryConfigHandler.ConfigurationKeys.MULTI_TERM_REWRITE_METHOD should be set on the QueryConfigHandler");
    }

    // use a TAG to take the value to the Builder
    node.setTag(MultiTermRewriteMethodProcessor.TAG_ID, rewriteMethod);

  }

  return node;
}
 

import org.apache.lucene.queryparser.flexible.standard.nodes.WildcardQueryNode; //导入依赖的package包/类
public StandardQueryTreeBuilder() {
  setBuilder(GroupQueryNode.class, new GroupQueryNodeBuilder());
  setBuilder(FieldQueryNode.class, new FieldQueryNodeBuilder());
  setBuilder(BooleanQueryNode.class, new BooleanQueryNodeBuilder());
  setBuilder(FuzzyQueryNode.class, new FuzzyQueryNodeBuilder());
  setBuilder(NumericQueryNode.class, new DummyQueryNodeBuilder());
  setBuilder(NumericRangeQueryNode.class, new NumericRangeQueryNodeBuilder());
  setBuilder(BoostQueryNode.class, new BoostQueryNodeBuilder());
  setBuilder(ModifierQueryNode.class, new ModifierQueryNodeBuilder());
  setBuilder(WildcardQueryNode.class, new WildcardQueryNodeBuilder());
  setBuilder(TokenizedPhraseQueryNode.class, new PhraseQueryNodeBuilder());
  setBuilder(MatchNoDocsQueryNode.class, new MatchNoDocsQueryNodeBuilder());
  setBuilder(PrefixWildcardQueryNode.class,
      new PrefixWildcardQueryNodeBuilder());
  setBuilder(TermRangeQueryNode.class, new TermRangeQueryNodeBuilder());
  setBuilder(RegexpQueryNode.class, new RegexpQueryNodeBuilder());
  setBuilder(SlopQueryNode.class, new SlopQueryNodeBuilder());
  setBuilder(StandardBooleanQueryNode.class,
      new StandardBooleanQueryNodeBuilder());
  setBuilder(MultiPhraseQueryNode.class, new MultiPhraseQueryNodeBuilder());
  setBuilder(MatchAllDocsQueryNode.class, new MatchAllDocsQueryNodeBuilder());
  
}
 

import org.apache.lucene.queryparser.flexible.standard.nodes.WildcardQueryNode; //导入依赖的package包/类
@Override
protected QueryNode postProcessNode(QueryNode node) throws QueryNodeException {

  // the old Lucene Parser ignores FuzzyQueryNode that are also PrefixWildcardQueryNode or WildcardQueryNode
  // we do the same here, also ignore empty terms
  if (node instanceof FieldQueryNode || node instanceof FuzzyQueryNode) {      
    FieldQueryNode fqn = (FieldQueryNode) node;      
    CharSequence text = fqn.getText(); 
    
    // do not process wildcards for TermRangeQueryNode children and 
    // QuotedFieldQueryNode to reproduce the old parser behavior
    if (fqn.getParent() instanceof TermRangeQueryNode 
        || fqn instanceof QuotedFieldQueryNode 
        || text.length() <= 0){
      // Ignore empty terms
      return node;
    }
    
    // Code below simulates the old lucene parser behavior for wildcards
    
    if (isPrefixWildcard(text)) {        
      PrefixWildcardQueryNode prefixWildcardQN = new PrefixWildcardQueryNode(fqn);
      return prefixWildcardQN;
      
    } else if (isWildcard(text)){
      WildcardQueryNode wildcardQN = new WildcardQueryNode(fqn);
      return wildcardQN;
    }
           
  }

  return node;

}
 

import org.apache.lucene.queryparser.flexible.standard.nodes.WildcardQueryNode; //导入依赖的package包/类
@Override
public WildcardQuery build(QueryNode queryNode) throws QueryNodeException {
  WildcardQueryNode wildcardNode = (WildcardQueryNode) queryNode;

  WildcardQuery q = new WildcardQuery(new Term(wildcardNode.getFieldAsString(),
                                               wildcardNode.getTextAsString()));
  
  MultiTermQuery.RewriteMethod method = (MultiTermQuery.RewriteMethod)queryNode.getTag(MultiTermRewriteMethodProcessor.TAG_ID);
  if (method != null) {
    q.setRewriteMethod(method);
  }
  
  return q;
}