Android Open Source - RealtimeStorage-Android Filter

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Back to project page RealtimeStorage-Android.

License

The source code is released under:

MIT License

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Java Source Code

package co.realtime.storage;
/*  w  ww  .  j a v a2s. co  m*/
import java.util.ArrayList;
import java.util.LinkedHashMap;

class Filter {
  StorageFilter operator;
  String itemName;
  ItemAttribute value;
  ItemAttribute valueEx;
  
  enum StorageFilter {
    EQUALS("equals"), NOTEQUAL("notEqual"), GREATEREQUAL("greaterEqual"), GREATERTHAN("greaterThan"), LESSEREQUAL("lessEqual"), LESSERTHAN("lessThan"),
    NOTNULL("notNull"), NULL("null"), CONTAINS("contains"), NOTCONTAINS("notContains"), BEGINSWITH("beginsWith"), BETWEEN("between");
    private final String strFilter;    
    private StorageFilter(String s){
      strFilter = s;
    }    
    public String toString() {
      return strFilter;
    }
  }
    
  Filter(StorageFilter operator, String itemName, ItemAttribute value, ItemAttribute valueEx){
    this.operator = operator;
    this.itemName = itemName;
    this.value = value;
    this.valueEx = valueEx;
  }

  @Override
  public int hashCode() {
    final int prime = 31;
    int result = 1;
    result = prime * result + ((itemName == null) ? 0 : itemName.hashCode());
    result = prime * result + ((operator == null) ? 0 : operator.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;
    Filter other = (Filter) obj;
    if (itemName == null) {
      if (other.itemName != null)
        return false;
    } else if (!itemName.equals(other.itemName))
      return false;
    if (operator != other.operator)
      return false;
    return true;
  }
  
  public LinkedHashMap<String, Object> prepareForJSON(){
    LinkedHashMap<String, Object> lhm = new LinkedHashMap<String, Object>();
    lhm.put("operator", this.operator.toString());
    lhm.put("item", this.itemName);
    if(this.operator==StorageFilter.BETWEEN){
      ArrayList<Object> ar = new ArrayList<Object>();
      ar.add(value);
      ar.add(valueEx);
      lhm.put("value", ar);
    } else if(this.operator== StorageFilter.NULL || this.operator == StorageFilter.NOTNULL){
      //Don't put value because of the exception: Invalid number of argument(s) for the NULL ComparisonOperator.
    } else {
      lhm.put("value", this.value);
    }
    return lhm;
  }
}

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