com.viaoa.object.OAObjectKey Maven / Gradle / Ivy
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/* Copyright 1999 Vince Via [email protected]
Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
You may obtain a copy of the License at http://www.apache.org/licenses/LICENSE-2.0
Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.
*/
package com.viaoa.object;
import java.io.Serializable;
/**
* Used to represent the objectId properties of an OAObject.
* It is used as the key when storing objects in a hashtable.
* If the object key property is assigned it will be used, otherwise the guid is used for the hash code.
*
* OAObjectKey overwrites equals() to work the following way:
* if guid is equal then objects are equal. If property key is equal, then objects are equal, unless either of the objects being compared is
* new.
*
* For more information about this package, see documentation.
*/
public class OAObjectKey implements Serializable, Comparable {
static final long serialVersionUID = 1L;
private Object[] objectIds; // cant be changed, it will affect hashCode
protected int hc = -1;
protected boolean bNew; // if new and objectId is unassigned
protected int guid = 0; // changed to object's guid (if object not used, then it stays as 0)
protected boolean bEmpty;
/*
public OAObjectKey(Object[] ids) {
setIds(ids);
bEmpty = isEmpty();
}
*/
public OAObjectKey(Object... ids) {
setIds(ids);
bEmpty = isEmpty();
}
public OAObjectKey(Object[] ids, int guid, boolean bNew) {
setIds(ids);
this.guid = guid;
this.bNew = bNew;
bEmpty = isEmpty();
}
public OAObjectKey(OAObject obj) {
setIds(OAObjectInfoDelegate.getPropertyIdValues(obj));
guid = obj.guid;
bNew = obj.getNew();
bEmpty = isEmpty();
}
private void setIds(Object[] ids) {
if (ids == null) {
return;
}
for (int i = 0; i < ids.length; i++) {
if (ids[i] instanceof OAObject) {
ids[i] = OAObjectKeyDelegate.getKey((OAObject) ids[i]);
}
}
this.objectIds = ids;
}
public int getGuid() {
return guid;
}
/**
* create a key for an object that has a parent. Example: an Order that has/owns OrderItems: an OAObjectKey can be created for an
* OrderItem: new OAObjectKey(order, 1). This can be used to then find the OrderItem using a OADataSource.getObject(OrderItem.class,
* key) or HubController.get(OrderItem.class, key)
*/
public OAObjectKey(OAObject parent, Object value) {
this(new Object[] { parent, value });
}
public OAObjectKey(Object value) {
this(new Object[] { value });
}
public OAObjectKey(int value) {
this(new Object[] { new Integer(value) });
}
public OAObjectKey(long value) {
this(new Object[] { new Long(value) });
}
public OAObjectKey(String value) {
this(new Object[] { value });
}
public boolean isNew() {
return bNew;
}
public int hashCode() {
if (hc == -1) {
if (bEmpty) {
if (guid != 0) {
hc = guid;
} else {
hc = super.hashCode();
}
} else {
hc = 0;
for (int i = 0; objectIds != null && i < objectIds.length; i++) {
if (objectIds[i] != null) {
hc += objectIds[i].hashCode();
}
}
}
}
return hc;
}
public boolean exactEquals(OAObjectKey key) {
if (!equals(key)) {
return false;
}
if (key.bNew != this.bNew) {
return false;
}
if (key.guid != this.guid) {
return false;
}
return true;
}
public boolean equals(Object obj) {
// If object id(s) are null, then the guid is used for comparing.
if (obj == null) {
return bEmpty;
}
if (obj instanceof OAObject) {
obj = OAObjectKeyDelegate.getKey((OAObject) obj);
}
if (obj == this) {
return true;
}
if (obj instanceof OAObjectKey) {
OAObjectKey ok = (OAObjectKey) obj;
if (this.bEmpty) {
if (ok.bEmpty) {
if ((ok.guid == 0 || this.guid == 0) || (ok.guid == this.guid)) {
return true;
}
} else {
if (this.bNew && !ok.bNew) {
return this.guid == ok.guid;
}
}
return false;
} else {
if (ok.bEmpty) {
if (ok.bNew && !this.bNew) {
return this.guid == ok.guid;
}
return false;
}
}
int x = objectIds.length;
if (x != ok.objectIds.length) {
return false;
}
if (x == 0) {
return (this.guid == ok.guid);
}
for (int j = 0; j < x; j++) {
if (objectIds[j] == ok.objectIds[j]) {
continue;
}
if (objectIds[j] == null || ok.objectIds[j] == null) {
return false;
}
if (!objectIds[j].equals(ok.objectIds[j])) {
return false;
}
}
return true;
}
if (this.bEmpty) {
return (obj == null);
}
if (objectIds.length == 1) {
if (objectIds[0] != null && objectIds[0].equals(obj)) {
return true;
}
}
return false;
}
public int compareTo(Object obj) {
// If object id(s) are null, then the guid is used for comparing.
if (obj == null) {
if (this.bEmpty) {
return 0;
}
return 1;
}
if (obj instanceof OAObject) {
obj = OAObjectKeyDelegate.getKey((OAObject) obj);
}
if (obj == this) {
return 0;
}
if (obj instanceof OAObjectKey) {
OAObjectKey ok = (OAObjectKey) obj;
if (this.bEmpty) {
if (!ok.bEmpty) {
if (this.bNew && !ok.bNew && this.guid == ok.guid) {
return 0;
}
return -1;
}
if (this.guid == 0 || ok.guid == 0) {
return 0;
}
if (this.guid == ok.guid) {
return 0;
}
if (this.guid > ok.guid) {
return 1;
}
return -1;
} else {
if (ok.bEmpty) {
if (ok.bNew && !this.bNew && this.guid == ok.guid) {
return 0;
}
return 1;
}
}
int x = this.objectIds.length;
int x2 = ok.objectIds.length;
for (int j = 0; j < x; j++) {
if (j == x2) {
return 1;
}
int cmp = compare(this.objectIds[j], ok.objectIds[j]);
if (cmp != 0) {
return cmp;
}
}
if (x2 > x) {
return -1;
}
return 0;
}
if (bEmpty) {
return -1;
}
if (this.objectIds.length == 0) {
return -1;
}
if (this.objectIds[0] == null) {
return -1;
}
int cmp = compare(objectIds[0], obj);
if (cmp != 0) {
return cmp;
}
if (objectIds.length > 1) {
return 1;
}
return 0;
}
private int compare(Object obj1, Object obj2) {
if (obj1 == null) {
if (obj2 == null) {
return 0;
} else {
return -1;
}
}
if (obj2 == null) {
return 1;
}
if (obj1 instanceof Number && obj2 instanceof Number) {
double d1 = ((Number) obj1).doubleValue();
double d2 = ((Number) obj2).doubleValue();
if (d1 == d2) {
return 0;
}
if (d1 > d2) {
return 1;
}
return -1;
}
String s1, s2;
if (obj1 instanceof String) {
s1 = (String) obj1;
} else {
s1 = obj1.toString();
}
if (obj2 instanceof String) {
s2 = (String) obj2;
} else {
s2 = obj2.toString();
}
return s1.compareTo(s2);
}
public boolean isEmpty() {
if (objectIds == null) {
return true;
}
for (int i = 0; i < objectIds.length; i++) {
if (objectIds[i] != null) {
return false;
}
}
return true;
}
public Object[] getObjectIds() {
return this.objectIds;
}
public String toString() {
String s = null;
for (int i = 0; objectIds != null && i < objectIds.length; i++) {
if (s == null) {
s = "" + objectIds[i];
} else {
s += " " + objectIds[i];
}
}
if (bEmpty) {
s = "new.guid=" + guid;
}
return s;
}
}