solr/solrj/src/java/org/apache/solr/client/solrj/io/stream/expr/StreamExpressionNamedParameter.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.solr.client.solrj.io.stream.expr;


import java.util.Objects;

/**
 * Provides a named parameter
 */
public class StreamExpressionNamedParameter implements StreamExpressionParameter {
  private String name;
  private StreamExpressionParameter parameter;
  
  public StreamExpressionNamedParameter(String name){
    this.name = name;
  }
  public StreamExpressionNamedParameter(String name, String parameter){
    this.name = name;
    setParameter(parameter);
  }
  public StreamExpressionNamedParameter(String name, StreamExpressionParameter parameter){
    this.name = name;
    setParameter(parameter);
  }
  
  public String getName(){
    return this.name;
  }
  public void setName(String name){
    if(null == name || 0 == name.length()){
      throw new IllegalArgumentException("Null or empty name is not allowed is not allowed.");
    }
    
    this.name = name;
  }
  
  public StreamExpressionParameter getParameter(){
    return this.parameter;
  }
  public void setParameter(StreamExpressionParameter parameter){
    this.parameter = parameter;
  }
  public StreamExpressionNamedParameter withParameter(StreamExpressionParameter parameter){
    setParameter(parameter);
    return this;
  }
  public void setParameter(String parameter){
    this.parameter = new StreamExpressionValue(parameter);
  }
  public StreamExpressionNamedParameter withParameter(String parameter){
    setParameter(parameter);
    return this;
  }  
  
  @Override
  public String toString(){
    StringBuilder sb = new StringBuilder(name);
    sb.append("=");
    
    // check if we require quoting
    boolean requiresQuote = false;
    if(parameter instanceof StreamExpressionValue){
      String value = ((StreamExpressionValue)parameter).getValue();
      requiresQuote = !StreamExpressionParser.wordToken(value);
    }
    
    if(requiresQuote){ sb.append("\""); }
    sb.append(parameter.toString());
    if(requiresQuote){ sb.append("\""); }
    
    return sb.toString();
  }
  
  @Override
  public boolean equals(Object other){
    if(other.getClass() != StreamExpressionNamedParameter.class){
      return false;
    }
    
    StreamExpressionNamedParameter check = (StreamExpressionNamedParameter)other;
    
    if(null == this.name && null != check.name){
      return false;
    }
    if(null != this.name && null == check.name){
      return false;
    }
    
    if(null != this.name && null != check.name && !this.name.equals(check.name)){
      return false;
    }
    
    return this.parameter.equals(check.parameter);
  }

  @Override
  public int hashCode() {
    return Objects.hash(name);
  }
}