| /* |
| * 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.phoenix.parse; |
| |
| import java.sql.SQLException; |
| |
| import org.apache.phoenix.compile.ColumnResolver; |
| |
| |
| |
| /** |
| * |
| * Node representing the selection of all columns (*) in the SELECT clause of SQL |
| * |
| * |
| * @since 0.1 |
| */ |
| public class WildcardParseNode extends TerminalParseNode { |
| public static final String NAME = "*"; |
| public static final WildcardParseNode INSTANCE = new WildcardParseNode(false); |
| public static final WildcardParseNode REWRITE_INSTANCE = new WildcardParseNode(true); |
| |
| private final boolean isRewrite; |
| |
| private WildcardParseNode(boolean isRewrite) { |
| this.isRewrite = isRewrite; |
| } |
| |
| @Override |
| public <T> T accept(ParseNodeVisitor<T> visitor) throws SQLException { |
| return visitor.visit(this); |
| } |
| |
| public boolean isRewrite() { |
| return isRewrite; |
| } |
| |
| @Override |
| public int hashCode() { |
| final int prime = 31; |
| int result = 1; |
| result = prime * result + (isRewrite ? 1231 : 1237); |
| return result; |
| } |
| |
| @Override |
| public boolean equals(Object obj) { |
| if (this == obj) |
| return true; |
| if (obj == null) |
| return false; |
| if (getClass() != obj.getClass()) |
| return false; |
| WildcardParseNode other = (WildcardParseNode) obj; |
| if (isRewrite != other.isRewrite) |
| return false; |
| return true; |
| } |
| |
| @Override |
| public void toSQL(ColumnResolver resolver, StringBuilder buf) { |
| buf.append(' '); |
| buf.append(NAME); |
| buf.append(' '); |
| } |
| |
| } |