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/*
@VaadinApache2LicenseForJavaFiles@
*/
package com.vaadin.data.util.sqlcontainer;
import java.io.Serializable;
/**
* RowId represents identifiers of a single database result set row.
*
* The data structure of a RowId is an Object array which contains the values of
* the primary key columns of the identified row. This allows easy equals()
* -comparison of RowItems.
*/
public class RowId implements Serializable {
private static final long serialVersionUID = -3161778404698901258L;
protected Object[] id;
/**
* Prevent instantiation without required parameters.
*/
protected RowId() {
}
public RowId(Object[] id) {
if (id == null) {
throw new IllegalArgumentException("id parameter must not be null!");
}
this.id = id;
}
public Object[] getId() {
return id;
}
@Override
public int hashCode() {
int result = 31;
if (id != null) {
for (Object o : id) {
if (o != null) {
result += o.hashCode();
}
}
}
return result;
}
@Override
public boolean equals(Object obj) {
if (obj == null || !(obj instanceof RowId)) {
return false;
}
Object[] compId = ((RowId) obj).getId();
if (id == null && compId == null) {
return true;
}
if (id.length != compId.length) {
return false;
}
for (int i = 0; i < id.length; i++) {
if ((id[i] == null && compId[i] != null)
|| (id[i] != null && !id[i].equals(compId[i]))) {
return false;
}
}
return true;
}
@Override
public String toString() {
StringBuffer s = new StringBuffer();
for (int i = 0; i < id.length; i++) {
s.append(id[i]);
if (i < id.length - 1) {
s.append("/");
}
}
return s.toString();
}
}
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