heron/eco/src/java/com/twitter/heron/eco/definition/PropertyDefinition.java

//  Copyright 2017 Twitter. All rights reserved.
//
//  Licensed 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 com.twitter.heron.eco.definition;

public class PropertyDefinition {

  private String name;
  private Object value;
  private String ref;

  public String getName() {
    return name;
  }

  public void setName(String name) {
    this.name = name;
  }

  public Object getValue() {
    return value;
  }

  public void setValue(Object value) {
    if (this.ref != null) {
      throw new IllegalStateException("A property can only have a value OR a reference, not both.");
    }
    this.value = value;
  }

  public String getRef() {
    return ref;
  }

  public void setRef(String ref) {
    if (this.value != null) {
      throw new IllegalStateException("A property can only have a value OR a reference, not both.");
    }
    this.ref = ref;
  }

  public boolean isReference() {
    return this.ref != null;
  }
}