IDEMPIERE-455 Discover and fix FindBugs problems / Pattern HE_EQUALS_USE_HASHCODE

org.adempiere.base/src/org/compiere/model/MLocation.java

@@ -419,6 +419,12 @@ public class MLocation extends X_C_Location implements Comparator<Object>
 		return equals(cmp);
 	}	//	equals
 
+	public int hashCode()
+	{
+	  assert false : "hashCode not designed";
+	  return 42; // any arbitrary constant will do
+	}
+
 	/**
 	 * 	Print Address Reverse Order
 	 *	@return true if reverse depending on country

org.adempiere.base/src/org/compiere/model/MLookup.java

@@ -277,6 +277,12 @@ public final class MLookup extends Lookup implements Serializable
 		return false;
 	}	//	equals
 	
+	public int hashCode()
+	{
+	  assert false : "hashCode not designed";
+	  return 42; // any arbitrary constant will do
+	}
+
 	/**
 	 *	Return Size
 	 *  @return size

org.adempiere.base/src/org/compiere/model/MRfQResponseLineQty.java

@@ -232,6 +232,12 @@ public class MRfQResponseLineQty extends X_C_RfQResponseLineQty implements Compa
     	return false;
 	}	//	equals
     
+    public int hashCode()
+	{
+	  assert false : "hashCode not designed";
+	  return 42; // any arbitrary constant will do
+	}
+
 	/**
 	 * 	Before Save
 	 *	@param newRecord new

org.adempiere.base/src/org/compiere/model/MultiMap.java

@@ -235,6 +235,12 @@ public final class MultiMap<K,V> implements Map<K,V>, Serializable
 		throw new java.lang.UnsupportedOperationException("Method equals() not implemented.");
 	}
 	
+	public int hashCode()
+	{
+	  assert false : "hashCode not designed";
+	  return 42; // any arbitrary constant will do
+	}
+
 	/**************************************************************************
 	 *  Returns class name and number of entries
 	 *  @return info

org.adempiere.base/src/org/compiere/model/PO.java

@@ -314,6 +314,12 @@ public abstract class PO
 		return super.equals(cmp);
 	}	//	equals
 	
+	public int hashCode()
+	{
+	  assert false : "hashCode not designed";
+	  return 42; // any arbitrary constant will do
+	}
+
 	/**
 	 * 	Compare based on DocumentNo, Value, Name, Description
 	 *	@param o1 Object 1

org.adempiere.base/src/org/compiere/print/CPaper.java

@@ -412,6 +412,12 @@ public class CPaper extends Paper
 		return false;
 	}	//	equals
 	
+	public int hashCode()
+	{
+	  assert false : "hashCode not designed";
+	  return 42; // any arbitrary constant will do
+	}
+
 	/*************************************************************************/
 
 	/**

org.adempiere.base/src/org/compiere/util/MSort.java

@@ -165,6 +165,12 @@ public final class MSort implements Comparator<Object>, Serializable
 		return false;
 	}	//	equals
 	
+	public int hashCode()
+	{
+	  assert false : "hashCode not designed";
+	  return 42; // any arbitrary constant will do
+	}
+
 	/**
 	 * 	String Representation
 	 * 	@return info

org.adempiere.install/src/org/compiere/install/util/ALayoutConstraint.java

@@ -104,6 +104,12 @@ public class ALayoutConstraint implements Comparable<Object>
 		return false;
 	}   //  equal
 
+	public int hashCode() 
+	{
+	  assert false : "hashCode not designed";
+	  return 42; // any arbitrary constant will do
+	}
+	
 	/**
 	 *  To String
 	 *  @return info

org.adempiere.ui.swing/src/org/compiere/apps/ALayoutConstraint.java

@@ -104,6 +104,12 @@ public class ALayoutConstraint implements Comparable<Object>
 		return false;
 	}   //  equal
 	
+	public int hashCode() 
+	{
+	  assert false : "hashCode not designed";
+	  return 42; // any arbitrary constant will do
+	}
+
 	/**
 	 *  To String
 	 *  @return info