Android Open Source - RealtimeStorage-Android Item Attribute

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License

The source code is released under:

MIT License

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Java Source Code

package co.realtime.storage;
//  w w  w . jav  a 2 s  .  co  m
import com.fasterxml.jackson.annotation.JsonIgnore;
import com.fasterxml.jackson.annotation.JsonIgnoreProperties;
import com.fasterxml.jackson.annotation.JsonValue;

/**
 * Class representing item's attribute. Can hold values of instance String and Number
 */
@JsonIgnoreProperties(ignoreUnknown = true)
public class ItemAttribute implements Comparable<ItemAttribute>{
  Boolean isString;
  Object value;

  public ItemAttribute(String str){
    isString = true;
    value = str;
  }

  public ItemAttribute(Number num){
    isString = false;
    value = num;
  }    

  /**
   * Returns the value of attribute
   * @return the value
   */
  @JsonValue
  @SuppressWarnings("unchecked")
  public <T> T get(){
    return (T) (this.isString ? (String)this.value : (Number)this.value);
  }

  /**
   * Checks if attribute is string type
   * @return true if is string type
   */
  @JsonIgnore
  public Boolean isString(){
    return this.isString;
  }
  
  /**
   * Checks if attribute is number type
   * @return true if is number type
   */
  @JsonIgnore
  public Boolean isNumber(){
    return !this.isString;
  }

  public String toString(){
    return (this.isString) ? (String)this.value : ((Number)this.value).toString();
  }

  //@SuppressWarnings({ "unchecked", "rawtypes" })
  @Override
  public int compareTo(ItemAttribute si) {
    if(this.isString)
      return ((String)this.value).compareTo(si.toString());
    if(si.isString())
      return this.value.toString().compareTo(si.toString());
    if (((Number)this.value).doubleValue() < ((Number)si.get()).doubleValue())
      return -1;        
    if (((Number)this.value).doubleValue() > ((Number)si.get()).doubleValue())
      return 1;        
    return 0;
    /*
    if(this.isString){
      return ((String)this.value).compareTo(si.toString());
    } else {
      if(si.isNumber()){
        if (((Number)this.value).doubleValue() < ((Number)si.get()).doubleValue())
          return -1;        
        if (((Number)this.value).doubleValue() > ((Number)si.get()).doubleValue())
          return 1;        
        return 0;
      } else { //Number vs String
        return this.value.toString().compareTo(si.toString());
      }
    }*/    
  }
  /*
  @Override
  public int hashCode() {
    final int prime = 31;
    int result = 1;
    result = prime * result + ((value == null) ? 0 : value.hashCode());
    return result;
  }

  @Override
  public boolean equals(Object obj) {
    if (this == obj)
      return true;
    if (obj == null){
      return false;
    }
    if (obj instanceof ItemAttribute){
      ItemAttribute other = (ItemAttribute) obj;
      if (value == null) {
        if (other.value != null) {
          return false;
        } else { 
          return true;
        }
      }
      if (this.compareTo(other)!=0) {
        return false;
      } else {
        return true;
      }
    }else{      
      return false;
    }
  }
   */
}

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