| /* |
| * 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.drill.exec.expr; |
| |
| import com.sun.codemodel.JExpressionImpl; |
| import com.sun.codemodel.JFormatter; |
| |
| /** |
| * Encapsulates a Java expression, defined as anything that is |
| * valid in the following code:<br> |
| * <code>(<i>expr</i>)</code> |
| */ |
| |
| public class DirectExpression extends JExpressionImpl { |
| static final org.slf4j.Logger logger = org.slf4j.LoggerFactory.getLogger(DirectExpression.class); |
| |
| private final String source; |
| |
| private DirectExpression(final String source) { |
| super(); |
| this.source = source; |
| } |
| |
| @Override |
| public void generate(JFormatter f) { |
| f.p('(').p(source).p(')'); |
| } |
| |
| public static DirectExpression direct( final String source ) { |
| return new DirectExpression(source); |
| } |
| |
| @Override |
| public int hashCode() { |
| final int prime = 31; |
| int result = 1; |
| result = prime * result + ((source == null) ? 0 : source.hashCode()); |
| return result; |
| } |
| |
| @Override |
| public boolean equals(Object obj) { |
| if (this == obj) { |
| return true; |
| } |
| if (obj == null) { |
| return false; |
| } |
| if (getClass() != obj.getClass()) { |
| return false; |
| } |
| DirectExpression other = (DirectExpression) obj; |
| if (source == null) { |
| if (other.source != null) { |
| return false; |
| } |
| } else if (!source.equals(other.source)) { |
| return false; |
| } |
| return true; |
| } |
| } |