iot.jcypher.domain.mapping.DomainState Maven / Gradle / Ivy
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Provides seamlessly integrated Java access to graph databases (Neo4J)
at different levels of abstraction.
/************************************************************************
* Copyright (c) 2014-2015 IoT-Solutions e.U.
*
* 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 iot.jcypher.domain.mapping;
import iot.jcypher.domain.ResolutionDepth;
import iot.jcypher.domain.genericmodel.DomainObject;
import iot.jcypher.domain.mapping.surrogate.InnerClassSurrogate;
import iot.jcypher.domain.mapping.surrogate.SurrogateState;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.IdentityHashMap;
import java.util.Iterator;
import java.util.List;
import java.util.Map;
import java.util.Map.Entry;
public class DomainState {
private Map object2IdMap;
private Map relation2IdMap;
// in a domain there can only exist unambiguous mappings between objects and nodes
private Map id2ObjectMap;
private Map> object2RelationsMap;
private Map> objectField2KeyedRelationsMap;
private Map> multiRelationsMap;
private SurrogateState surrogateState;
public DomainState() {
super();
this.object2IdMap = new HashMap();
this.relation2IdMap = new HashMap();
this.id2ObjectMap = new HashMap();
this.object2RelationsMap = new HashMap>();
this.objectField2KeyedRelationsMap = new HashMap>();
this.multiRelationsMap = new HashMap>();
this.surrogateState = new SurrogateState();
}
public DomainState createCopy() {
DomainState ret = new DomainState();
Iterator> it_1 = this.object2IdMap.entrySet().iterator();
while(it_1.hasNext()) {
Entry entry = it_1.next();
ret.object2IdMap.put(entry.getKey(), entry.getValue().createCopy());
}
Map copiedRels = new IdentityHashMap();
Iterator> it_2 = this.relation2IdMap.entrySet().iterator();
while(it_2.hasNext()) {
Entry entry = it_2.next();
ret.relation2IdMap.put(copyRelation(entry.getKey(), copiedRels), entry.getValue().createCopy());
}
Iterator> it_3 = this.id2ObjectMap.entrySet().iterator();
while(it_3.hasNext()) {
Entry entry = it_3.next();
ret.id2ObjectMap.put(entry.getKey(), entry.getValue());
}
Iterator>> it_4 = this.object2RelationsMap.entrySet().iterator();
while(it_4.hasNext()) {
Entry> entry = it_4.next();
ret.object2RelationsMap.put(entry.getKey(), copyRelationsList(entry.getValue(), copiedRels));
}
Map copiedSftks =
new IdentityHashMap();
Iterator>> it_5 = this.objectField2KeyedRelationsMap.entrySet().iterator();
while(it_5.hasNext()) {
Entry> entry = it_5.next();
ret.objectField2KeyedRelationsMap.put(
copySftks(entry.getKey(), copiedSftks),
copyRelationsList(entry.getValue(), copiedRels));
}
Map copiedSfks =
new IdentityHashMap();
Iterator>> it_6 = this.multiRelationsMap.entrySet().iterator();
while(it_6.hasNext()) {
Entry> entry = it_6.next();
ret.multiRelationsMap.put(copySfks(entry.getKey(), copiedSfks),
copyRelationsList(entry.getValue(), copiedRels));
}
ret.surrogateState = this.surrogateState.createCopy(copiedRels, ret);
return ret;
}
private SourceFieldKey copySfks(SourceFieldKey toCopy,
Map copiedSfks) {
SourceFieldKey ret = copiedSfks.get(toCopy);
if (ret == null) {
ret = new SourceFieldKey(toCopy.getSource(), toCopy.getFieldName());
copiedSfks.put(toCopy, ret);
}
return ret;
}
private SourceField2TargetKey copySftks(SourceField2TargetKey toCopy,
Map copiedSftks) {
SourceField2TargetKey ret = copiedSftks.get(toCopy);
if (ret == null) {
SourceFieldKey sfk = toCopy.getSourceFieldKey();
ret = new SourceField2TargetKey(sfk.getSource(), sfk.getFieldName(), toCopy.getTarget());
copiedSftks.put(toCopy, ret);
}
return ret;
}
@SuppressWarnings("unchecked")
private T copyRelation(T toCopy, Map copiedRels) {
T crel = (T) copiedRels.get(toCopy);
if (crel == null) {
crel = (T) toCopy.createCopy(this);
copiedRels.put(toCopy, crel);
}
return crel;
}
private List copyRelationsList(List toCopy,
Map copiedRels) {
List ret = null;
if (toCopy != null) {
ret = new ArrayList();
for (T rel : toCopy) {
ret.add(copyRelation(rel, copiedRels));
}
}
return ret;
}
private void addTo_Object2IdMap(Object key, Long value, int version, ResolutionDepth resolutionDepth) {
LoadInfo loadInfo = new LoadInfo();
loadInfo.id = value;
loadInfo.version = version;
loadInfo.resolutionDepth = resolutionDepth;
this.object2IdMap.put(key, loadInfo);
}
public ResolutionDepth getResolutionDepth(Object key) {
LoadInfo loadInfo = this.object2IdMap.get(key);
if (loadInfo != null)
return loadInfo.resolutionDepth;
return null;
}
public Long getIdFrom_Object2IdMap(Object key) {
LoadInfo loadInfo = this.object2IdMap.get(key);
if (loadInfo != null)
return loadInfo.id;
return null;
}
public LoadInfo getLoadInfoFrom_Object2IdMap(Object key) {
return this.object2IdMap.get(key);
}
public void add_Id2Relation(IRelation relat, Long id, int version) {
RelationLoadInfo rli = new RelationLoadInfo();
rli.id = id;
rli.version = version;
add_Info2Relation(relat, rli);
}
public void add_Info2Relation(IRelation relat, RelationLoadInfo rli) {
if (!relat.isDeferred()) {
IRelation toPut = relat;
if (relat instanceof KeyedRelationToChange) {
KeyedRelation oldOne = ((KeyedRelationToChange)relat).existingOne;
this.relation2IdMap.remove(oldOne);
SourceField2TargetKey key = new SourceField2TargetKey(oldOne.getStart(),
oldOne.getType(), oldOne.getEnd());
List rels = this.objectField2KeyedRelationsMap.get(key);
if (rels != null) {
rels.remove(oldOne);
}
SourceFieldKey fieldKey = key.getSourceFieldKey();
rels = this.multiRelationsMap.get(fieldKey);
if (rels != null) {
rels.remove(oldOne);
}
KeyedRelation newOne = ((KeyedRelationToChange)relat).getNewOne();
toPut = newOne;
}
this.relation2IdMap.put(toPut, rli);
if (toPut instanceof KeyedRelation) {
SourceField2TargetKey key = new SourceField2TargetKey(toPut.getStart(),
toPut.getType(), toPut.getEnd());
List rels = this.objectField2KeyedRelationsMap.get(key);
if (rels == null) {
rels = new ArrayList();
this.objectField2KeyedRelationsMap.put(key, rels);
}
if (!rels.contains(toPut))
rels.add((KeyedRelation) toPut);
SourceFieldKey fieldKey = key.getSourceFieldKey();
rels = this.multiRelationsMap.get(fieldKey);
if (rels == null) {
rels = new ArrayList();
this.multiRelationsMap.put(fieldKey, rels);
}
if (!rels.contains(toPut))
rels.add((KeyedRelation) toPut);
} else {
List rels = this.object2RelationsMap.get(toPut.getStart());
if (rels == null) {
rels = new ArrayList();
this.object2RelationsMap.put(toPut.getStart(), rels);
}
if (!rels.contains(toPut))
rels.add(toPut);
}
} else {
relat.setDomainState(this);
relat.setId(rli.id.longValue());
}
}
public RelationLoadInfo getFrom_Relation2IdMap(IRelation relat) {
IRelation key;
if (relat instanceof KeyedRelationToChange)
key = ((KeyedRelationToChange)relat).existingOne;
else
key = relat;
return this.relation2IdMap.get(key);
}
public void addTo_Id2ObjectMap(Object obj, Long id) {
this.id2ObjectMap.put(id, obj);
}
public void add_Id2Object(Object obj, Long id, int version, ResolutionDepth resolutionDepth) {
this.addTo_Id2ObjectMap(obj, id);
this.addTo_Object2IdMap(obj, id, version, resolutionDepth);
}
public void replace_Id2Object(Object old, Object obj, Long id) {
this.addTo_Id2ObjectMap(obj, id);
LoadInfo li = this.object2IdMap.remove(old);
this.addTo_Object2IdMap(obj, id, li.version, li.resolutionDepth);
}
public boolean existsRelation(IRelation relat) {
List rels = this.object2RelationsMap.get(relat.getStart());
if (rels != null) {
for (IRelation r : rels) {
if (r.equals(relat))
return true;
}
}
return false;
}
public List getKeyedRelations(SourceField2TargetKey key) {
return this.objectField2KeyedRelationsMap.get(key);
}
public List getKeyedRelations(SourceFieldKey key) {
return this.multiRelationsMap.get(key);
}
public IRelation findRelation(Object start, String type) {
List rels = this.object2RelationsMap.get(start);
if (rels != null) {
for (IRelation r : rels) {
if (r.getType().equals(type))
return r;
}
}
return null;
}
public void removeRelation(IRelation relat) {
if (relat instanceof KeyedRelation) {
SourceField2TargetKey key = new SourceField2TargetKey(relat.getStart(),
relat.getType(), relat.getEnd());
List rels = this.objectField2KeyedRelationsMap.get(key);
if (rels != null) {
rels.remove(relat);
}
SourceFieldKey fieldKey = key.getSourceFieldKey();
rels = this.multiRelationsMap.get(fieldKey);
if (rels != null) {
rels.remove(relat);
}
} else {
List rels = this.object2RelationsMap.get(relat.getStart());
if (rels != null) {
rels.remove(relat);
}
}
this.relation2IdMap.remove(relat);
}
public Object getFrom_Id2ObjectMap(Long id) {
return this.id2ObjectMap.get(id);
}
public SurrogateState getSurrogateState() {
return surrogateState;
}
/***********************************/
public interface IRelation {
public String getType();
public Object getStart();
public Object getEnd();
public void setDomainState(DomainState domainState);
public void setId(long id);
public IRelation createCopy(DomainState ds);
/**
* @return true if start and / or end is an InnerClassSurrogate
*/
public boolean isDeferred();
}
/***********************************/
public static class Relation implements IRelation {
private String type;
private Object start;
private Object end;
private DomainState domainState;
private long id;
public Relation(String type, Object start, Object end) {
super();
this.type = type;
Object strt = start;
if (start instanceof InnerClassSurrogate) {
Object ro = ((InnerClassSurrogate)start).getRealObject();
if (ro == null)
((InnerClassSurrogate)start).addRelationUpdate(new RelationUpdate(true));
else
strt = ro;
}
this.start = strt;
Object nd = end;
if (end instanceof InnerClassSurrogate) {
Object ro = ((InnerClassSurrogate)end).getRealObject();
if (ro == null)
((InnerClassSurrogate)end).addRelationUpdate(new RelationUpdate(false));
else
nd = ro;
}
this.end = nd;
}
@Override
public IRelation createCopy(DomainState ds) {
Relation ret = new Relation(this.type, this.start, this.end);
ret.domainState = ds;
ret.id = this.id;
return ret;
}
@Override
public String getType() {
return type;
}
@Override
public Object getStart() {
return start;
}
@Override
public Object getEnd() {
return end;
}
@Override
public boolean isDeferred() {
return this.start instanceof InnerClassSurrogate ||
this.end instanceof InnerClassSurrogate;
}
@Override
public void setDomainState(DomainState domainState) {
this.domainState = domainState;
}
@Override
public void setId(long id) {
this.id = id;
}
protected long getId() {
return this.id;
}
@Override
public int hashCode() {
final int prime = 31;
int result = 1;
result = prime * result + ((end == null) ? 0 : end.hashCode());
result = prime * result + ((start == null) ? 0 : start.hashCode());
result = prime * result + ((type == null) ? 0 : type.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;
Relation other = (Relation) obj;
if (end == null) {
if (other.end != null)
return false;
} else if (!end.equals(other.end))
return false;
if (start == null) {
if (other.start != null)
return false;
} else if (!start.equals(other.start))
return false;
if (type == null) {
if (other.type != null)
return false;
} else if (!type.equals(other.type))
return false;
return true;
}
@Override
public String toString() {
return "Relation [type=" + type + ", start=" + start + ", end="
+ end + "]";
}
/**********************************/
public class RelationUpdate {
private boolean start;
private RelationUpdate(boolean start) {
super();
this.start = start;
}
public void updateWith(Object startOrEnd) {
RelationLoadInfo rli = Relation.this.domainState.getFrom_Relation2IdMap(Relation.this);
int v = rli != null ? rli.getVersion() : -1;
if (this.start)
Relation.this.start = startOrEnd;
else
Relation.this.end = startOrEnd;
Relation.this.domainState.add_Id2Relation(Relation.this,
Relation.this.id, v);
}
}
}
/***********************************/
public static class KeyedRelation extends Relation {
// must be of simple type so that it can be mapped to a property
private Object key;
// must be either null or
// must be of simple type so that it can be mapped to a property
private Object value;
public KeyedRelation(String type, Object key, Object start, Object end) {
super(type, start, end);
this.key = key;
}
@Override
public IRelation createCopy(DomainState ds) {
KeyedRelation ret = new KeyedRelation(getType(), this.key, getStart(), getEnd());
ret.setDomainState(ds);
ret.setId(getId());
return ret;
}
public Object getKey() {
return this.key;
}
public Object getValue() {
return value;
}
public void setValue(Object value) {
this.value = value;
}
@Override
public int hashCode() {
final int prime = 31;
int result = super.hashCode();
result = prime * result + ((key == null) ? 0 : key.hashCode());
result = prime * result + ((value == null) ? 0 : value.hashCode());
return result;
}
@Override
public boolean equals(Object obj) {
if (this == obj)
return true;
if (!super.equals(obj))
return false;
KeyedRelation other = (KeyedRelation) obj;
if (key == null) {
if (other.key != null)
return false;
} else if (!key.equals(other.key))
return false;
if (value == null) {
if (other.value != null)
return false;
} else if (!value.equals(other.value))
return false;
return true;
}
@Override
public String toString() {
return "KeyedRelation [key=" + key + ", getType()=" + getType()
+ ", getStart()=" + getStart() + ", getEnd()=" + getEnd()
+ "]";
}
}
/***********************************/
public static class KeyedRelationToChange implements IRelation {
private KeyedRelation existingOne;
private KeyedRelation newOne;
public KeyedRelationToChange(KeyedRelation existingOne, KeyedRelation newOne) {
super();
this.existingOne = existingOne;
this.newOne = newOne;
}
@Override
public IRelation createCopy(DomainState ds) {
KeyedRelationToChange ret = new KeyedRelationToChange(
(KeyedRelation)this.existingOne.createCopy(ds),
(KeyedRelation)this.newOne.createCopy(ds));
return ret;
}
@Override
public String getType() {
return this.existingOne.getType();
}
@Override
public Object getStart() {
return this.existingOne.getStart();
}
@Override
public Object getEnd() {
return this.existingOne.getEnd();
}
@Override
public boolean isDeferred() {
return this.newOne.isDeferred() || this.existingOne.isDeferred();
}
@Override
public void setDomainState(DomainState domainState) {
if (this.newOne.isDeferred())
this.newOne.setDomainState(domainState);
if (this.existingOne.isDeferred())
this.existingOne.setDomainState(domainState);
}
@Override
public void setId(long id) {
if (this.newOne.isDeferred())
this.newOne.setId(id);
if (this.existingOne.isDeferred())
this.existingOne.setId(id);
}
public KeyedRelation getNewOne() {
return this.newOne;
}
}
/********************************/
public static class SourceField2TargetKey {
private Object source;
private String fieldName;
private Object target;
public SourceField2TargetKey(Object src, String fieldName, Object target) {
super();
this.source = src;
this.fieldName = fieldName;
this.target = target;
}
public SourceField2TargetKey(SourceFieldKey sfk, Object target) {
super();
this.source = sfk.getSource();
this.fieldName = sfk.getFieldName();
this.target = target;
}
public Object getTarget() {
return this.target;
}
public SourceFieldKey getSourceFieldKey() {
return new SourceFieldKey(this.source, this.fieldName);
}
@Override
public int hashCode() {
final int prime = 31;
int result = 1;
result = prime * result
+ ((fieldName == null) ? 0 : fieldName.hashCode());
result = prime * result
+ ((source == null) ? 0 : source.hashCode());
result = prime * result
+ ((target == null) ? 0 : target.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;
SourceField2TargetKey other = (SourceField2TargetKey) obj;
if (fieldName == null) {
if (other.fieldName != null)
return false;
} else if (!fieldName.equals(other.fieldName))
return false;
if (source == null) {
if (other.source != null)
return false;
} else if (!source.equals(other.source))
return false;
if (target == null) {
if (other.target != null)
return false;
} else if (!target.equals(other.target))
return false;
return true;
}
}
/********************************/
public static class SourceFieldKey {
private Object source;
private String fieldName;
public SourceFieldKey(Object src, String fieldName) {
super();
this.source = src;
this.fieldName = fieldName;
}
public Object getSource() {
return source;
}
public String getFieldName() {
return fieldName;
}
@Override
public int hashCode() {
final int prime = 31;
int result = 1;
result = prime * result
+ ((fieldName == null) ? 0 : fieldName.hashCode());
result = prime * result
+ ((source == null) ? 0 : source.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;
SourceFieldKey other = (SourceFieldKey) obj;
if (fieldName == null) {
if (other.fieldName != null)
return false;
} else if (!fieldName.equals(other.fieldName))
return false;
if (source == null) {
if (other.source != null)
return false;
} else if (!source.equals(other.source))
return false;
return true;
}
}
/********************************/
public static class RelationLoadInfo {
private Long id;
private int version;
private RelationLoadInfo createCopy() {
RelationLoadInfo ret = new RelationLoadInfo();
ret.id = this.id;
ret.version = this.version;
return ret;
}
public Long getId() {
return id;
}
public int getVersion() {
return version;
}
}
/********************************/
public static class LoadInfo {
private Long id;
private int version;
private ResolutionDepth resolutionDepth;
private DomainObject domainObject;
public LoadInfo() {
super();
}
private LoadInfo createCopy() {
LoadInfo ret = new LoadInfo();
ret.id = this.id;
ret.version = this.version;
ret.resolutionDepth = this.resolutionDepth;
ret.domainObject = this.domainObject;
return ret;
}
public Long getId() {
return id;
}
public int getVersion() {
return version;
}
public ResolutionDepth getResolutionDepth() {
return resolutionDepth;
}
public LoadInfo setResolutionDepth(ResolutionDepth resolutionDepth) {
this.resolutionDepth = resolutionDepth;
return this;
}
public void setVersion(int v) {
this.version = v;
}
public DomainObject getDomainObject() {
return domainObject;
}
public void setDomainObject(DomainObject domainObject) {
this.domainObject = domainObject;
}
}
}
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