/*-
* See the file LICENSE for redistribution information.
*
* Copyright (c) 2002, 2011 Oracle and/or its affiliates. All rights reserved.
*
*/
package com.sleepycat.persist.impl;
import java.util.Collections;
import java.util.HashMap;
import java.util.List;
import com.sleepycat.compat.DbCompat;
import com.sleepycat.persist.raw.RawObject;
/**
* Implements Accessor for RawObject access.
*
* @author Mark Hayes
*/
class RawAccessor implements Accessor {
private Format parentFormat;
private Accessor superAccessor;
private FieldInfo priKeyField;
private List<FieldInfo> secKeyFields;
private List<FieldInfo> nonKeyFields;
private boolean isCompositeKey;
RawAccessor(Format parentFormat,
Accessor superAccessor,
FieldInfo priKeyField,
List<FieldInfo> secKeyFields,
List<FieldInfo> nonKeyFields) {
this.parentFormat = parentFormat;
this.superAccessor = superAccessor;
this.priKeyField = priKeyField;
this.secKeyFields = secKeyFields;
this.nonKeyFields = nonKeyFields;
}
RawAccessor(Format parentFormat,
List<FieldInfo> nonKeyFields) {
this.parentFormat = parentFormat;
this.nonKeyFields = nonKeyFields;
secKeyFields = Collections.emptyList();
isCompositeKey = true;
}
public Object newInstance() {
RawObject superObject;
if (superAccessor != null) {
superObject = ((RawObject) superAccessor.newInstance());
} else {
superObject = null;
}
return new RawObject
(parentFormat, new HashMap<String, Object>(), superObject);
}
public Object newArray(int len) {
throw DbCompat.unexpectedState();
}
public boolean isPriKeyFieldNullOrZero(Object o) {
if (priKeyField != null) {
Object val = getValue(o, priKeyField);
Format format = priKeyField.getType();
if (format.isPrimitive()) {
return ((Number) val).longValue() == 0L;
} else {
return val == null;
}
} else if (superAccessor != null) {
return superAccessor.isPriKeyFieldNullOrZero(getSuper(o));
} else {
throw DbCompat.unexpectedState("No primary key field");
}
}
public void writePriKeyField(Object o, EntityOutput output)
throws RefreshException {
if (priKeyField != null) {
Object val = getValue(o, priKeyField);
Format format = priKeyField.getType();
output.writeKeyObject(val, format);
} else if (superAccessor != null) {
superAccessor.writePriKeyField(getSuper(o), output);
} else {
throw DbCompat.unexpectedState("No primary key field");
}
}
public void readPriKeyField(Object o, EntityInput input)
throws RefreshException {
if (priKeyField != null) {
Format format = priKeyField.getType();
Object val = input.readKeyObject(format);
setValue(o, priKeyField, val);
} else if (superAccessor != null) {
superAccessor.readPriKeyField(getSuper(o), input);
} else {
throw DbCompat.unexpectedState("No primary key field");
}
}
public void writeSecKeyFields(Object o, EntityOutput output)
throws RefreshException {
if (priKeyField != null &&
!priKeyField.getType().isPrimitive() &&
priKeyField.getType().getId() != Format.ID_STRING) {
output.registerPriKeyObject(getValue(o, priKeyField));
}
if (superAccessor != null) {
superAccessor.writeSecKeyFields(getSuper(o), output);
}
for (int i = 0; i < secKeyFields.size(); i += 1) {
writeField(o, secKeyFields.get(i), output);
}
}
public void readSecKeyFields(Object o,
EntityInput input,
int startField,
int endField,
int superLevel)
throws RefreshException {
if (priKeyField != null &&
!priKeyField.getType().isPrimitive() &&
priKeyField.getType().getId() != Format.ID_STRING) {
input.registerPriKeyObject(getValue(o, priKeyField));
} else if (priKeyField != null &&
priKeyField.getType().getId() == Format.ID_STRING) {
input.registerPriStringKeyObject(getValue(o, priKeyField));
}
if (superLevel != 0 && superAccessor != null) {
superAccessor.readSecKeyFields
(getSuper(o), input, startField, endField, superLevel - 1);
} else {
if (superLevel > 0) {
throw DbCompat.unexpectedState("Super class does not exist");
}
}
if (superLevel <= 0) {
for (int i = startField;
i <= endField && i < secKeyFields.size();
i += 1) {
readField(o, secKeyFields.get(i), input);
}
}
}
public void writeNonKeyFields(Object o, EntityOutput output)
throws RefreshException {
if (superAccessor != null) {
superAccessor.writeNonKeyFields(getSuper(o), output);
}
for (int i = 0; i < nonKeyFields.size(); i += 1) {
writeField(o, nonKeyFields.get(i), output);
}
}
public void readNonKeyFields(Object o,
EntityInput input,
int startField,
int endField,
int superLevel)
throws RefreshException {
if (superLevel != 0 && superAccessor != null) {
superAccessor.readNonKeyFields
(getSuper(o), input, startField, endField, superLevel - 1);
} else {
if (superLevel > 0) {
throw DbCompat.unexpectedState("Super class does not exist");
}
}
if (superLevel <= 0) {
for (int i = startField;
i <= endField && i < nonKeyFields.size();
i += 1) {
readField(o, nonKeyFields.get(i), input);
}
}
}
public void writeCompositeKeyFields(Object o, EntityOutput output)
throws RefreshException {
for (int i = 0; i < nonKeyFields.size(); i += 1) {
writeField(o, nonKeyFields.get(i), output);
}
}
public void readCompositeKeyFields(Object o, EntityInput input)
throws RefreshException {
for (int i = 0; i < nonKeyFields.size(); i += 1) {
readField(o, nonKeyFields.get(i), input);
}
}
public Object getField(Object o,
int field,
int superLevel,
boolean isSecField) {
if (superLevel > 0) {
return superAccessor.getField
(getSuper(o), field, superLevel - 1, isSecField);
}
FieldInfo fld =
isSecField ? secKeyFields.get(field) : nonKeyFields.get(field);
return getValue(o, fld);
}
public void setField(Object o,
int field,
int superLevel,
boolean isSecField,
Object value) {
if (superLevel > 0) {
superAccessor.setField
(getSuper(o), field, superLevel - 1, isSecField, value);
return;
}
FieldInfo fld =
isSecField ? secKeyFields.get(field) : nonKeyFields.get(field);
setValue(o, fld, value);
}
public void setPriField(Object o, Object value) {
if (priKeyField != null) {
setValue(o, priKeyField, value);
} else if (superAccessor != null) {
superAccessor.setPriField(getSuper(o), value);
} else {
throw DbCompat.unexpectedState("No primary key field");
}
}
private RawObject getSuper(Object o) {
return ((RawObject) o).getSuper();
}
private Object getValue(Object o, FieldInfo field) {
return ((RawObject) o).getValues().get(field.getName());
}
private void setValue(Object o, FieldInfo field, Object val) {
((RawObject) o).getValues().put(field.getName(), val);
}
private void writeField(Object o, FieldInfo field, EntityOutput output)
throws RefreshException {
Object val = getValue(o, field);
Format format = field.getType();
if (isCompositeKey || format.isPrimitive()) {
output.writeKeyObject(val, format);
} else if (format.getId() == Format.ID_STRING) {
output.writeString((String) val);
} else {
output.writeObject(val, format);
}
}
private void readField(Object o, FieldInfo field, EntityInput input)
throws RefreshException {
Format format = field.getType();
Object val;
if (isCompositeKey || format.isPrimitive()) {
val = input.readKeyObject(format);
} else if (format.getId() == Format.ID_STRING) {
val = input.readStringObject();
} else {
val = input.readObject();
}
setValue(o, field, val);
}
public FieldInfo getPriKeyField() {
return priKeyField;
}
}