geode-core/src/main/java/org/apache/geode/cache/query/internal/parse/ASTImport.java

/*
 * Licensed to the Apache Software Foundation (ASF) under one or more contributor license
 * agreements. See the NOTICE file distributed with this work for additional information regarding
 * copyright ownership. The ASF licenses this file to You under the Apache License, Version 2.0 (the
 * "License"); you may not use this file except in compliance with the License. You may obtain a
 * copy of the License at
 *
 * http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software distributed under the License
 * is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express
 * or implied. See the License for the specific language governing permissions and limitations under
 * the License.
 */


package org.apache.geode.cache.query.internal.parse;

import antlr.Token;
import antlr.collections.AST;

import org.apache.geode.cache.query.internal.QCompiler;

public class ASTImport extends GemFireAST {
  private static final long serialVersionUID = 6002078657881181949L;

  public ASTImport() {}


  public ASTImport(Token t) {
    super(t);
  }


  @Override
  public void compile(QCompiler compiler) {
    StringBuffer nameBuf = new StringBuffer();
    String asName = null;
    AST child = getFirstChild();
    while (child != null) {
      if (child.getType() == OQLLexerTokenTypes.LITERAL_as) {
        child = child.getNextSibling();
        asName = child.getText();
        break;
      } else {
        nameBuf.append(child.getText());
        child = child.getNextSibling();
        if (child != null && child.getType() != OQLLexerTokenTypes.LITERAL_as) {
          nameBuf.append('.');
        }
      }
    }
    compiler.importName(nameBuf.toString(), asName);
  }
}