org.eclipse.persistence.oxm.mappings.XMLBinaryDataCollectionMapping Maven / Gradle / Ivy
Show all versions of org.eclipse.persistence.core Show documentation
/*
* Copyright (c) 1998, 2018 Oracle and/or its affiliates. All rights reserved.
*
* This program and the accompanying materials are made available under the
* terms of the Eclipse Public License v. 2.0 which is available at
* http://www.eclipse.org/legal/epl-2.0,
* or the Eclipse Distribution License v. 1.0 which is available at
* http://www.eclipse.org/org/documents/edl-v10.php.
*
* SPDX-License-Identifier: EPL-2.0 OR BSD-3-Clause
*/
// Contributors:
// Oracle - initial API and implementation from Oracle TopLink
package org.eclipse.persistence.oxm.mappings;
import java.util.Enumeration;
import java.util.Vector;
import javax.activation.DataHandler;
import org.eclipse.persistence.descriptors.ClassDescriptor;
import org.eclipse.persistence.exceptions.XMLMarshalException;
import org.eclipse.persistence.internal.helper.ClassConstants;
import org.eclipse.persistence.internal.helper.DatabaseField;
import org.eclipse.persistence.internal.identitymaps.CacheKey;
import org.eclipse.persistence.internal.oxm.XMLBinaryDataHelper;
import org.eclipse.persistence.internal.oxm.XMLConversionManager;
import org.eclipse.persistence.internal.oxm.mappings.BinaryDataCollectionMapping;
import org.eclipse.persistence.internal.queries.ContainerPolicy;
import org.eclipse.persistence.internal.queries.JoinedAttributeManager;
import org.eclipse.persistence.internal.sessions.AbstractRecord;
import org.eclipse.persistence.internal.sessions.AbstractSession;
import org.eclipse.persistence.mappings.AttributeAccessor;
import org.eclipse.persistence.mappings.converters.Converter;
import org.eclipse.persistence.oxm.NamespaceResolver;
import org.eclipse.persistence.oxm.XMLConstants;
import org.eclipse.persistence.oxm.XMLDescriptor;
import org.eclipse.persistence.oxm.XMLField;
import org.eclipse.persistence.oxm.XMLMarshaller;
import org.eclipse.persistence.oxm.XMLUnmarshaller;
import org.eclipse.persistence.oxm.mappings.nullpolicy.AbstractNullPolicy;
import org.eclipse.persistence.oxm.mappings.nullpolicy.XMLNullRepresentationType;
import org.eclipse.persistence.oxm.record.DOMRecord;
import org.eclipse.persistence.oxm.record.XMLRecord;
import org.eclipse.persistence.queries.ObjectBuildingQuery;
import org.eclipse.persistence.sessions.Session;
import org.w3c.dom.Element;
import org.w3c.dom.Node;
/**
* Purpose:Provide a mapping for a collection of binary data values that can be treated
* as either inline binary values or as an attachment.
*
Responsibilities:
* - Handle converting binary types (byte[], Image etc) to base64
* - Make callbacks to AttachmentMarshaller/AttachmentUnmarshaller
* - Write out approriate attachment information (xop:include)
*
* XMLBinaryDataCollectionMapping represents a mapping of a collection of binary data in the object model
* to XML. This can either be written directly as inline binary data (base64) or
* passed through as an MTOM or SWAREF attachment.
*
The following types are allowable to be mapped using an XMLBinaryDataMapping:
* - java.awt.Image
* - byte[]
* - javax.activation.DataHandler
* - javax.xml.transform.Source
* - javax.mail.internet.MimeMultipart
*
* Setting the XPath: TopLink XML mappings make use of XPath statements to find the relevant
* data in an XML document. The XPath statement is relative to the context node specified in the descriptor.
* The XPath may contain path and positional information; the last node in the XPath forms the local
* node for the binary mapping. The XPath is specified on the mapping using the setXPath
* method.
*
*
Inline Binary Data: Set this flag if you want to always inline binary data for this mapping.
* This will disable consideration for attachment handling for this mapping.
*
*
SwaRef: Set this flag in order to specify that the target node of this mapping is of type
* xs:swaref
*
* @see org.eclipse.persistence.oxm.attachment.XMLAttachmentMarshaller
* @see org.eclipse.persistence.oxm.attachment.XMLAttachmentUnmarshaller
* @see org.eclipse.persistence.oxm.mappings.MimeTypePolicy
* @since TopLink 11.1.1.0.0g
*/
public class XMLBinaryDataCollectionMapping extends XMLCompositeDirectCollectionMapping implements BinaryDataCollectionMapping {
private boolean shouldInlineBinaryData;
private MimeTypePolicy mimeTypePolicy;
private boolean isSwaRef;
private Class collectionContentType;
private static final String INCLUDE = "Include";
public XMLBinaryDataCollectionMapping() {
collectionContentType = ClassConstants.APBYTE;
mimeTypePolicy = new FixedMimeTypePolicy(null);
}
@Override
public boolean shouldInlineBinaryData() {
return shouldInlineBinaryData;
}
@Override
public void setShouldInlineBinaryData(boolean b) {
shouldInlineBinaryData = b;
}
/**
* INTERNAL
*/
@Override
public String getMimeType(Object anObject) {
if (mimeTypePolicy == null) {
return null;
} else {
return mimeTypePolicy.getMimeType(anObject);
}
}
/**
* INTERNAL
*/
@Override
public String getMimeType() {
return getMimeType(null);
}
@Override
public MimeTypePolicy getMimeTypePolicy() {
return mimeTypePolicy;
}
/**
* Allow implementer to set the MimeTypePolicy class FixedMimeTypePolicy or AttributeMimeTypePolicy (dynamic)
* @param mimeTypePolicy MimeTypePolicy
*/
@Override
public void setMimeTypePolicy(MimeTypePolicy mimeTypePolicy) {
this.mimeTypePolicy = mimeTypePolicy;
}
/**
* Force mapping to set default FixedMimeTypePolicy using the MimeType string as argument
* @param mimeTypeString
*/
public void setMimeType(String mimeTypeString) {
// use the following to set dynamically - mapping.setMimeTypePolicy(new FixedMimeTypePolicy(property.getMimeType()));
mimeTypePolicy = new FixedMimeTypePolicy(mimeTypeString);
}
@Override
public boolean isSwaRef() {
return isSwaRef;
}
@Override
public void setSwaRef(boolean swaRef) {
isSwaRef = swaRef;
}
@Override
public boolean isAbstractCompositeDirectCollectionMapping() {
return false;
}
/**
* Set the Mapping field name attribute to the given XPath String
* @param xpathString String
*/
@Override
public void setXPath(String xpathString) {
XMLField field = new XMLField(xpathString);
field.setSchemaType(XMLConstants.BASE_64_BINARY_QNAME);
setField(new XMLField(xpathString));
}
@Override
public void writeFromObjectIntoRow(Object object, AbstractRecord row, AbstractSession session, WriteType writeType) {
XMLRecord record = (XMLRecord) row;
Object attributeValue = getAttributeValueFromObject(object);
ContainerPolicy cp = this.getContainerPolicy();
Vector elements = new Vector(cp.sizeFor(attributeValue));
XMLField field = (XMLField) getField();
NamespaceResolver resolver = field.getNamespaceResolver();
boolean isAttribute = field.getLastXPathFragment().isAttribute();
String prefix = null;
XMLField includeField = null;
if (!isAttribute) {
if (record.isXOPPackage() && !isSwaRef() && !shouldInlineBinaryData()) {
field = (XMLField) getField();
// If the field's resolver is non-null and has an entry for XOP,
// use it - otherwise, create a new resolver, set the XOP entry,
// on it, and use it instead.
// We do this to avoid setting the XOP namespace declaration on
// a given field or descriptor's resolver, as it is only required
// on the current element
if (resolver != null) {
prefix = resolver.resolveNamespaceURI(XMLConstants.XOP_URL);
}
if (prefix == null) {
prefix = XMLConstants.XOP_PREFIX;//"xop";
resolver = new NamespaceResolver();
resolver.put(prefix, XMLConstants.XOP_URL);
}
includeField = new XMLField(prefix + XMLConstants.COLON + INCLUDE + "/@href");
includeField.setNamespaceResolver(resolver);
}
}
XMLField textField = new XMLField(field.getXPath() + '/' + XMLConstants.TEXT);
textField.setNamespaceResolver(field.getNamespaceResolver());
textField.setSchemaType(field.getSchemaType());
//field = textField;
boolean inline = false;
for (Object iter = cp.iteratorFor(attributeValue); cp.hasNext(iter);) {
Object element = cp.next(iter, session);
element = getValueToWrite(element, object, record, field, includeField, session);
if(element == null){
AbstractNullPolicy nullPolicy = getNullPolicy();
if (nullPolicy == null) {
elements.addElement(null);
} else {
if (nullPolicy.getMarshalNullRepresentation() == XMLNullRepresentationType.XSI_NIL) {
elements.addElement(XMLRecord.NIL);
} else if (nullPolicy.getMarshalNullRepresentation() == XMLNullRepresentationType.ABSENT_NODE) {
// Do nothing
} else {
elements.addElement(XMLConstants.EMPTY_STRING);
}
}
}else{
if(element.getClass() == ClassConstants.ABYTE) {
inline = true;
}
elements.addElement(element);
}
}
Object fieldValue = null;
if (!elements.isEmpty()) {
fieldValue = this.getDescriptor().buildFieldValueFromDirectValues(elements, elementDataTypeName, session);
}
if(inline) {
row.put(textField, fieldValue);
} else {
row.put(field, fieldValue);
}
}
public Object getValueToWrite(Object value, Object parent, XMLRecord record, XMLField field, XMLField includeField, AbstractSession session) {
XMLMarshaller marshaller = record.getMarshaller();
Object element = convertObjectValueToDataValue(value, session, record.getMarshaller());
boolean isAttribute = ((XMLField) getField()).getLastXPathFragment().isAttribute();
if(element == null){
return null;
}
if (isAttribute) {
if (isSwaRef() && (marshaller.getAttachmentMarshaller() != null)) {
//should be a DataHandler here
try {
String id = marshaller.getAttachmentMarshaller().addSwaRefAttachment((DataHandler) element);
element = id;
} catch (ClassCastException cce) {
throw XMLMarshalException.invalidSwaRefAttribute(getAttributeClassification().getName());
}
} else {
//inline case
XMLBinaryDataHelper.EncodedData data = XMLBinaryDataHelper.getXMLBinaryDataHelper().getBytesForBinaryValue(element, record.getMarshaller(), mimeTypePolicy.getMimeType(parent));
String base64Value = ((XMLConversionManager) session.getDatasourcePlatform().getConversionManager()).buildBase64StringFromBytes(data.getData());
element = base64Value;
}
} else {
if (record.isXOPPackage() && !isSwaRef() && !shouldInlineBinaryData()) {
//write as attachment
String c_id = XMLConstants.EMPTY_STRING;
byte[] bytes = null;
if ((getAttributeElementClass() == ClassConstants.ABYTE) || (getAttributeElementClass() == ClassConstants.APBYTE)) {
if (getAttributeElementClass() == ClassConstants.ABYTE) {
element = session.getDatasourcePlatform().getConversionManager().convertObject(element, ClassConstants.APBYTE);
}
bytes = (byte[])element;
c_id = marshaller.getAttachmentMarshaller().addMtomAttachment(bytes, 0, bytes.length, this.mimeTypePolicy.getMimeType(parent), field.getLastXPathFragment().getLocalName(),
field.getLastXPathFragment().getNamespaceURI());
} else if (getAttributeElementClass() == XMLBinaryDataHelper.getXMLBinaryDataHelper().DATA_HANDLER) {
c_id = marshaller.getAttachmentMarshaller().addMtomAttachment((DataHandler) element, field.getLastXPathFragment().getLocalName(), field.getLastXPathFragment().getNamespaceURI());
if(c_id == null) {
XMLBinaryDataHelper.EncodedData data = XMLBinaryDataHelper.getXMLBinaryDataHelper().getBytesForBinaryValue(element, marshaller, this.mimeTypePolicy.getMimeType(parent));
bytes = data.getData();
}
} else {
XMLBinaryDataHelper.EncodedData data = XMLBinaryDataHelper.getXMLBinaryDataHelper().getBytesForBinaryValue(element, marshaller, this.mimeTypePolicy.getMimeType(parent));
bytes = data.getData();
c_id = marshaller.getAttachmentMarshaller().addMtomAttachment(bytes, 0, bytes.length, data.getMimeType(), field.getLastXPathFragment().getLocalName(), field.getLastXPathFragment().getNamespaceURI());
}
if(c_id == null) {
element = bytes;
} else {
DOMRecord include = new DOMRecord(field.getLastXPathFragment().getLocalName());
include.setSession(session);
include.put(includeField, c_id);
element = include;
// Need to call setAttributeNS on the record, unless the xop prefix
// is defined on the descriptor's resolver already
NamespaceResolver resolver = ((XMLField) getField()).getNamespaceResolver();
if (resolver == null || resolver.resolveNamespaceURI(XMLConstants.XOP_URL) == null) {
resolver = new NamespaceResolver();
resolver.put(XMLConstants.XOP_PREFIX, XMLConstants.XOP_URL);
String xpath = XMLConstants.XOP_PREFIX + XMLConstants.COLON + INCLUDE;
XMLField incField = new XMLField(xpath);
incField.setNamespaceResolver(resolver);
Object obj = include.getIndicatingNoEntry(incField);
if (obj != null && obj instanceof DOMRecord) {
if (((DOMRecord) obj).getDOM().getNodeType() == Node.ELEMENT_NODE) {
((Element) ((DOMRecord) obj).getDOM()).setAttributeNS(javax.xml.XMLConstants.XMLNS_ATTRIBUTE_NS_URI, javax.xml.XMLConstants.XMLNS_ATTRIBUTE + XMLConstants.COLON + XMLConstants.XOP_PREFIX, XMLConstants.XOP_URL);
}
}
}
}
} else if (isSwaRef() && (marshaller.getAttachmentMarshaller() != null)) {
//element should be a data-handler
try {
String c_id = marshaller.getAttachmentMarshaller().addSwaRefAttachment((DataHandler) element);
element = c_id;
} catch (Exception ex) {
}
} else {
//inline
if (!((getAttributeElementClass() == ClassConstants.ABYTE) || (getAttributeElementClass() == ClassConstants.APBYTE))) {
element = XMLBinaryDataHelper.getXMLBinaryDataHelper().getBytesForBinaryValue(element, marshaller, this.mimeTypePolicy.getMimeType(parent)).getData();
}
}
}
return element;
}
@Override
public void writeSingleValue(Object value, Object parent, XMLRecord record, AbstractSession session) {
XMLField field = (XMLField) getField();
NamespaceResolver resolver = field.getNamespaceResolver();
boolean isAttribute = field.getLastXPathFragment().isAttribute();
String prefix = null;
XMLField includeField = null;
if (!isAttribute) {
if (record.isXOPPackage() && !isSwaRef() && !shouldInlineBinaryData()) {
field = (XMLField) getField();
// If the field's resolver is non-null and has an entry for XOP,
// use it - otherwise, create a new resolver, set the XOP entry,
// on it, and use it instead.
// We do this to avoid setting the XOP namespace declaration on
// a given field or descriptor's resolver, as it is only required
// on the current element
if (resolver != null) {
prefix = resolver.resolveNamespaceURI(XMLConstants.XOP_URL);
}
if (prefix == null) {
prefix = XMLConstants.XOP_PREFIX;//"xop";
resolver = new NamespaceResolver();
resolver.put(prefix, XMLConstants.XOP_URL);
}
includeField = new XMLField(prefix + XMLConstants.COLON + INCLUDE + "/@href");
includeField.setNamespaceResolver(resolver);
}
}
XMLField textField = new XMLField(field.getXPath() + '/' +XMLConstants.TEXT);
textField.setNamespaceResolver(field.getNamespaceResolver());
textField.setSchemaType(field.getSchemaType());
Object valueToWrite = getValueToWrite(value, parent, record, field, includeField, session);
if(!isAttribute && valueToWrite.getClass() == ClassConstants.ABYTE) {
//if the returned value is a byte[] and not an XMLRecord, just write it inline
record.add(textField, valueToWrite);
}
record.add(field, valueToWrite);
}
@Override
public Object valueFromRow(AbstractRecord row, JoinedAttributeManager joinManager, ObjectBuildingQuery query, CacheKey cacheKey, AbstractSession executionSession, boolean isTargetProtected, Boolean[] wasCacheUsed) {
ContainerPolicy cp = this.getContainerPolicy();
Object fieldValue = row.getValues(this.getField());
if (fieldValue == null) {
if (reuseContainer) {
Object currentObject = ((XMLRecord) row).getCurrentObject();
Object container = getAttributeAccessor().getAttributeValueFromObject(currentObject);
return container != null ? container : cp.containerInstance();
} else {
return cp.containerInstance();
}
}
Vector fieldValues = this.getDescriptor().buildDirectValuesFromFieldValue(fieldValue);
if (fieldValues == null) {
if (reuseContainer) {
Object currentObject = ((XMLRecord) row).getCurrentObject();
Object container = getAttributeAccessor().getAttributeValueFromObject(currentObject);
return container != null ? container : cp.containerInstance();
} else {
return cp.containerInstance();
}
}
Object result = null;
if (reuseContainer) {
Object currentObject = ((XMLRecord) row).getCurrentObject();
Object container = getAttributeAccessor().getAttributeValueFromObject(currentObject);
result = container != null ? container : cp.containerInstance();
} else {
result = cp.containerInstance(fieldValues.size());
}
for (Enumeration stream = fieldValues.elements(); stream.hasMoreElements();) {
Object element = stream.nextElement();
// PERF: Direct variable access.
//Object value = row.get(field);
//Object fieldValue = null;
XMLUnmarshaller unmarshaller = ((XMLRecord) row).getUnmarshaller();
if (element instanceof String) {
if (this.isSwaRef() && (unmarshaller.getAttachmentUnmarshaller() != null)) {
fieldValue = unmarshaller.getAttachmentUnmarshaller().getAttachmentAsDataHandler((String) element);
} else if (!this.isSwaRef()) {
//should be base64
byte[] bytes = ((XMLConversionManager) executionSession.getDatasourcePlatform().getConversionManager()).convertSchemaBase64ToByteArray(element);
fieldValue = bytes;
}
} else {
//this was an element, so do the XOP/SWAREF/Inline binary cases for an element
XMLRecord record = (XMLRecord) element;
if (getNullPolicy().valueIsNull((Element) record.getDOM())) {
fieldValue = null;
}
else{
record.setSession(executionSession);
if ((unmarshaller.getAttachmentUnmarshaller() != null) && unmarshaller.getAttachmentUnmarshaller().isXOPPackage() && !this.isSwaRef() && !this.shouldInlineBinaryData()) {
//look for the include element:
String xpath = XMLConstants.EMPTY_STRING;
// need a prefix for XOP
String prefix = null;
NamespaceResolver descriptorResolver = ((XMLDescriptor) getDescriptor()).getNamespaceResolver();
if (descriptorResolver != null) {
prefix = descriptorResolver.resolveNamespaceURI(XMLConstants.XOP_URL);
}
if (prefix == null) {
prefix = XMLConstants.XOP_PREFIX;
}
NamespaceResolver tempResolver = new NamespaceResolver();
tempResolver.put(prefix, XMLConstants.XOP_URL);
xpath = prefix + XMLConstants.COLON + INCLUDE + "/@href";
XMLField field = new XMLField(xpath);
field.setNamespaceResolver(tempResolver);
String includeValue = (String) record.get(field);
if (element != null && includeValue != null) {
if ((getAttributeElementClass() == ClassConstants.ABYTE) || (getAttributeElementClass() == ClassConstants.APBYTE)) {
fieldValue = unmarshaller.getAttachmentUnmarshaller().getAttachmentAsByteArray(includeValue);
} else {
fieldValue = unmarshaller.getAttachmentUnmarshaller().getAttachmentAsDataHandler(includeValue);
}
} else {
//If we didn't find the Include element, check for inline
fieldValue = record.get(XMLConstants.TEXT);
//should be a base64 string
fieldValue = ((XMLConversionManager) executionSession.getDatasourcePlatform().getConversionManager()).convertSchemaBase64ToByteArray(fieldValue);
}
} else if ((unmarshaller.getAttachmentUnmarshaller() != null) && isSwaRef()) {
String refValue = (String) record.get(XMLConstants.TEXT);
if (refValue != null) {
fieldValue = unmarshaller.getAttachmentUnmarshaller().getAttachmentAsDataHandler(refValue);
}
} else {
fieldValue = record.get(XMLConstants.TEXT);
//should be a base64 string
fieldValue = ((XMLConversionManager) executionSession.getDatasourcePlatform().getConversionManager()).convertSchemaBase64ToByteArray(fieldValue);
}
}
}
Object attributeValue = convertDataValueToObjectValue(fieldValue, executionSession, unmarshaller);
cp.addInto(attributeValue, result, query.getSession());
}
return result;
}
public void setCollectionContentType(Class javaClass) {
setAttributeElementClass(javaClass);
}
/*
* This is the same as calling getAttributeElementClass()
* If not set by the user than byte[].class is the default
*/
public Class getCollectionContentType() {
return getAttributeElementClass();
}
/**
* PUBLIC:
* Set the class each element in the object's
* collection should be converted to, before the collection
* is inserted into the object.
* This is optional - if left null, the elements will be added
* to the object's collection unconverted.
*/
@Override
public void setAttributeElementClass(Class attributeElementClass) {
super.setAttributeElementClass(attributeElementClass);
this.collectionContentType = attributeElementClass;
}
@Override
public Class getAttributeElementClass() {
Class elementClass = super.getAttributeElementClass();
if(elementClass == null) {
return this.collectionContentType;
}
return elementClass;
}
}