org.eclipse.persistence.oxm.mappings.XMLBinaryDataMapping Maven / Gradle / Ivy
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/*
* 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 javax.activation.DataHandler;
import org.w3c.dom.Element;
import org.w3c.dom.Node;
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.BinaryDataMapping;
import org.eclipse.persistence.internal.oxm.mappings.Field;
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.record.DOMRecord;
import org.eclipse.persistence.oxm.record.XMLRecord;
import org.eclipse.persistence.queries.ObjectBuildingQuery;
import org.eclipse.persistence.sessions.Session;
/**
* Purpose:Provide a mapping for binary data that can be treated as either inline 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)
*
* XMLBinaryDataMapping represents a mapping 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 typed 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 XMLBinaryDataMapping extends XMLDirectMapping implements BinaryDataMapping {
private boolean shouldInlineBinaryData;
private MimeTypePolicy mimeTypePolicy;
private boolean isSwaRef;
private static final String include = ":Include/@href";
public XMLBinaryDataMapping() {
}
public boolean shouldInlineBinaryData() {
return shouldInlineBinaryData;
}
public void setShouldInlineBinaryData(boolean b) {
shouldInlineBinaryData = b;
}
/**
* INTERNAL
*/
public String getMimeType(Object anObject) {
if (mimeTypePolicy == null) {
return null;
} else {
return mimeTypePolicy.getMimeType(anObject);
}
}
/**
* INTERNAL
*/
public String getMimeType() {
if(mimeTypePolicy == null) {
return null;
}
return mimeTypePolicy.getMimeType(null);
}
public MimeTypePolicy getMimeTypePolicy() {
return mimeTypePolicy;
}
/**
* Allow implementer to set the MimeTypePolicy class FixedMimeTypePolicy or AttributeMimeTypePolicy (dynamic)
* @param aPolicy MimeTypePolicy
*/
public void setMimeTypePolicy(MimeTypePolicy aPolicy) {
mimeTypePolicy = aPolicy;
}
/**
* 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);
}
public boolean isSwaRef() {
return isSwaRef;
}
public void setSwaRef(boolean swaRef) {
isSwaRef = swaRef;
}
/**
* Set the Mapping field name attribute to the given XPath String
* @param xpathString String
*/
public void setXPath(String xpathString) {
setField(new XMLField(xpathString));
}
@Override
public void writeFromObjectIntoRow(Object object, AbstractRecord row, AbstractSession session, WriteType writeType) {
Object attributeValue = getAttributeValueFromObject(object);
if (attributeValue == null) {
XMLField field = (XMLField) getField();
if(getNullPolicy() != null && !field.getXPathFragment().isSelfFragment()) {
getNullPolicy().directMarshal((Field) this.getField(), (XMLRecord) row, object);
}
return;
}
writeSingleValue(attributeValue, object, (XMLRecord) row, session);
}
public void writeSingleValue(Object attributeValue, Object parent, XMLRecord record, AbstractSession session) {
XMLMarshaller marshaller = record.getMarshaller();
attributeValue = convertObjectValueToDataValue(attributeValue, session, record.getMarshaller());
XMLField field = (XMLField) getField();
if (field.getLastXPathFragment().isAttribute()) {
if (isSwaRef() && (marshaller.getAttachmentMarshaller() != null)) {
//should be a DataHandler here
try {
String value = null;
if (getAttributeClassification() == XMLBinaryDataHelper.getXMLBinaryDataHelper().DATA_HANDLER) {
value = marshaller.getAttachmentMarshaller().addSwaRefAttachment((DataHandler) attributeValue);
} else {
XMLBinaryDataHelper.EncodedData data = XMLBinaryDataHelper.getXMLBinaryDataHelper().getBytesForBinaryValue(//
attributeValue, marshaller, getMimeType(parent));
byte[] bytes = data.getData();
value = marshaller.getAttachmentMarshaller().addSwaRefAttachment(bytes, 0, bytes.length);
}
record.put(field, value);
} catch (ClassCastException cce) {
throw XMLMarshalException.invalidSwaRefAttribute(getAttributeClassification().getName());
}
} else {
//inline case
XMLBinaryDataHelper.EncodedData data = XMLBinaryDataHelper.getXMLBinaryDataHelper().getBytesForBinaryValue(attributeValue, record.getMarshaller(), getMimeType(parent));
String base64Value = ((XMLConversionManager) session.getDatasourcePlatform().getConversionManager()).buildBase64StringFromBytes(data.getData());
record.put(field, base64Value);
}
return;
}
if (record.isXOPPackage() && !isSwaRef() && !shouldInlineBinaryData()) {
//write as attachment
String c_id = XMLConstants.EMPTY_STRING;
byte[] bytes = null;
String elementName = field.getLastXPathFragment().getLocalName();
String namespaceUri = field.getLastXPathFragment().getNamespaceURI();
if(field.getLastXPathFragment().isSelfFragment()) {
//If it's a self mapping, get the element from the DOM record
DOMRecord domRecord = (DOMRecord)record;
if(domRecord.getDOM().getNodeType() == Node.ELEMENT_NODE) {
elementName = domRecord.getDOM().getLocalName();
namespaceUri = domRecord.getDOM().getNamespaceURI();
}
}
if ((getAttributeClassification() == ClassConstants.ABYTE) || (getAttributeClassification() == ClassConstants.APBYTE)) {
if (getAttributeClassification() == ClassConstants.ABYTE) {
attributeValue = ((XMLConversionManager) session.getDatasourcePlatform().getConversionManager()).convertObject(attributeValue, ClassConstants.APBYTE);
}
bytes = (byte[])attributeValue;
c_id = marshaller.getAttachmentMarshaller().addMtomAttachment(//
bytes, 0,//
bytes.length,//
this.getMimeType(parent),//
elementName,//
namespaceUri);//
} else if (getAttributeClassification() == XMLBinaryDataHelper.getXMLBinaryDataHelper().DATA_HANDLER) {
c_id = marshaller.getAttachmentMarshaller().addMtomAttachment(//
(DataHandler) attributeValue, elementName, namespaceUri);
if(c_id == null) {
//get the bytes so we can write it out inline
XMLBinaryDataHelper.EncodedData data = XMLBinaryDataHelper.getXMLBinaryDataHelper().getBytesForBinaryValue(//
attributeValue, marshaller, getMimeType(parent));
bytes = data.getData();
}
} else {
XMLBinaryDataHelper.EncodedData data = XMLBinaryDataHelper.getXMLBinaryDataHelper().getBytesForBinaryValue(//
attributeValue, marshaller, getMimeType(parent));
bytes = data.getData();
c_id = marshaller.getAttachmentMarshaller().addMtomAttachment(bytes, 0,//
bytes.length,//
data.getMimeType(),//
elementName,//
namespaceUri);
}
if(c_id == null) {
XMLField textField = null;
if(field.isSelfField()){
textField = new XMLField(XMLConstants.TEXT);
}else{
textField = new XMLField(field.getXPath() + '/' + XMLConstants.TEXT);
}
textField.setNamespaceResolver(field.getNamespaceResolver());
textField.setSchemaType(field.getSchemaType());
record.put(textField, bytes);
//write out bytes inline
} else {
String xpath = this.getXPath();
String prefix = null;
boolean prefixAlreadyDefined = false;
// 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
NamespaceResolver resolver = field.getNamespaceResolver();
if (resolver != null) {
prefix = resolver.resolveNamespaceURI(XMLConstants.XOP_URL);
}
if (prefix == null) {
prefix = XMLConstants.XOP_PREFIX;
resolver = new NamespaceResolver();
resolver.put(prefix, XMLConstants.XOP_URL);
} else {
prefixAlreadyDefined = true;
}
String incxpath = null;
if(field.isSelfField()){
incxpath = prefix + ":Include";
xpath = (prefix + include);
}else{
incxpath = xpath + '/' + prefix + ":Include";
xpath += ('/' + prefix + include);
}
XMLField xpathField = new XMLField(xpath);
xpathField.setNamespaceResolver(resolver);
record.put(xpathField, c_id);
// Need to call setAttributeNS on the record, unless the xop prefix
// is defined on the descriptor's resolver already
XMLField incField = new XMLField(incxpath);
incField.setNamespaceResolver(resolver);
Object obj = record.getIndicatingNoEntry(incField);
if (!prefixAlreadyDefined && 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 + prefix, XMLConstants.XOP_URL);
}
}
}
} else if (isSwaRef() && (marshaller.getAttachmentMarshaller() != null)) {
//AttributeValue should be a data-handler
try {
String c_id = null;
if (getAttributeClassification() == XMLBinaryDataHelper.getXMLBinaryDataHelper().DATA_HANDLER) {
c_id = marshaller.getAttachmentMarshaller().addSwaRefAttachment((DataHandler) attributeValue);
} else {
XMLBinaryDataHelper.EncodedData data = XMLBinaryDataHelper.getXMLBinaryDataHelper().getBytesForBinaryValue(//
attributeValue, marshaller, getMimeType(parent));
byte[] bytes = data.getData();
c_id = marshaller.getAttachmentMarshaller().addSwaRefAttachment(bytes, 0, bytes.length);
}
XMLField textField = new XMLField(field.getXPath() + '/' + XMLConstants.TEXT);
textField.setNamespaceResolver(field.getNamespaceResolver());
textField.setSchemaType(field.getSchemaType());
record.put(textField, c_id);
} catch (Exception ex) {
}
} else {
//inline
XMLField textField = null;
if(field.isSelfField()){
textField = new XMLField(XMLConstants.TEXT);
}else{
textField = new XMLField(field.getXPath() + '/' + XMLConstants.TEXT);
}
textField.setNamespaceResolver(field.getNamespaceResolver());
textField.setSchemaType(field.getSchemaType());
if ((getAttributeClassification() == ClassConstants.ABYTE) || (getAttributeClassification() == ClassConstants.APBYTE)) {
record.put(textField, attributeValue);
} else {
byte[] bytes = XMLBinaryDataHelper.getXMLBinaryDataHelper().getBytesForBinaryValue(//
attributeValue, marshaller, getMimeType(parent)).getData();
record.put(textField, bytes);
}
}
}
public Object valueFromRow(AbstractRecord row, JoinedAttributeManager joinManager, ObjectBuildingQuery query, CacheKey cacheKey, AbstractSession executionSession, boolean isTargetProtected, Boolean[] wasCacheUsed) {
// PERF: Direct variable access.
Object value = row.get(this.field);
if (value == null) {
return value;
}
Object fieldValue = null;
XMLUnmarshaller unmarshaller = ((XMLRecord) row).getUnmarshaller();
if (value instanceof String) {
if (this.isSwaRef() && (unmarshaller.getAttachmentUnmarshaller() != null)) {
if (getAttributeClassification() == XMLBinaryDataHelper.getXMLBinaryDataHelper().DATA_HANDLER) {
fieldValue = unmarshaller.getAttachmentUnmarshaller().getAttachmentAsDataHandler((String) value);
} else {
fieldValue = unmarshaller.getAttachmentUnmarshaller().getAttachmentAsByteArray((String) value);
}
} else if (!this.isSwaRef()) {
//should be base64
byte[] bytes = ((XMLConversionManager) executionSession.getDatasourcePlatform().getConversionManager()).convertSchemaBase64ToByteArray(value);
fieldValue = bytes;
}
} else if(value instanceof byte[] || value instanceof Byte[]){
fieldValue = value;
} else {
//this was an element, so do the XOP/SWAREF/Inline binary cases for an element
XMLRecord record = (XMLRecord) value;
if (getNullPolicy().valueIsNull((Element) record.getDOM())) {
return null;
}
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();
// 20061023: handle NPE on null NSR
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 + include;
XMLField field = new XMLField(xpath);
field.setNamespaceResolver(tempResolver);
String includeValue = (String) record.get(field);
if (includeValue != null) {
if ((getAttributeClassification() == ClassConstants.ABYTE) || (getAttributeClassification() == 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
if (fieldValue != null) {
fieldValue = ((XMLConversionManager) executionSession.getDatasourcePlatform().getConversionManager()).convertSchemaBase64ToByteArray(fieldValue);
} else {
fieldValue = new byte[0];
}
}
}
Object attributeValue = convertDataValueToObjectValue(fieldValue, executionSession, unmarshaller);
attributeValue = XMLBinaryDataHelper.getXMLBinaryDataHelper().convertObject(attributeValue, getAttributeClassification(), executionSession, null);
return attributeValue;
}
public boolean isAbstractDirectMapping() {
return false;
}
@Override
public boolean isAbstractColumnMapping() {
return false;
}
}