The Java hashCode method outputs a hash creating an unique identifier for the object.
If two objects are equal, they must have the same hashCode() output.
The hashCode is generally overwritten by the developer to be an output of the natural identifier.
When the hashCode method is implemented, the equal method is also implemented to enable the equality of objects.
@Override
public int hashCode() {
return Objects.hash(firstId, secondId);
}
package org.apache.commons.lang.builder;
HashCodeBuilder builder = new HashCodeBuilder(17, 37);
builder.append(name);
if (table!=null){
//TODO: May be implementation of an URI for each database object
builder.append(table.getName());
builder.append(table.getSchemaObject().getName());
builder.append(table.getSchemaObject().getCatalog().getName());
builder.append(table.getSchemaObject().getCatalog().getPlatform().getName());
}
return builder.toHashCode();