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package com.sun.jersey.json.impl;
import java.lang.reflect.Method;
import java.lang.reflect.Type;
import java.util.Collection;
import java.util.Collections;
import java.util.HashMap;
import java.util.LinkedList;
import java.util.Map;
import javax.xml.bind.JAXBContext;
import javax.xml.namespace.QName;
/**
* Implementation of {@code JaxbXmlDocumentStructure} for JAXB provider in JDK.
*
* Note: If you're changing this class consider changing {@link JaxbRiXmlStructure} as well.
*
* @author Jakub Podlesak (jakub.podlesak at oracle.com)
* @author Michal Gajdos (michal.gajdos at oracle.com)
*/
public class JaxbJdkXmlStructure extends DefaultJaxbXmlDocumentStructure {
private static class NodeWrapper {
private final NodeWrapper parent;
private final Object runtimePropertyInfo;
private NodeWrapper(NodeWrapper parent, Object runtimePropertyInfo) {
this.parent = parent;
this.runtimePropertyInfo = runtimePropertyInfo;
}
@Override
public int hashCode() {
int hash = 13;
hash += (parent == null ? 0 : parent.hashCode());
hash += (runtimePropertyInfo == null ? 0 : runtimePropertyInfo.hashCode());
return hash;
}
@Override
public boolean equals(Object obj) {
if (this == obj) {
return true;
}
if (!(obj instanceof NodeWrapper)) {
return false;
}
final NodeWrapper other = (NodeWrapper) obj;
return runtimePropertyInfo == other.runtimePropertyInfo && parent == other.parent;
}
}
private final static ClassLoader systemClassLoader = ClassLoader.getSystemClassLoader();
private Map qNamesOfExpElems = new HashMap();
private Map qNamesOfExpAttrs = new HashMap();
private LinkedList processedNodes = new LinkedList();
private final boolean isReader;
public JaxbJdkXmlStructure(JAXBContext jaxbContext, Class expectedType, boolean isReader) {
super(jaxbContext, expectedType, isReader);
this.isReader = isReader;
}
private Collection getExpectedEntities(final String methodName) {
try {
final Class aClass = systemClassLoader
.loadClass("com.sun.xml.internal.bind.v2.runtime.unmarshaller.UnmarshallingContext");
final Object getInstance = aClass.getMethod("getInstance").invoke(null);
final Object getCurrentExpectedElements = aClass.getMethod(methodName).invoke(getInstance);
return (Collection) getCurrentExpectedElements;
} catch (NullPointerException npe) {
// TODO: need to check what could be done in JAXB in order to prevent the npe
// thrown from com.sun.xml.bind.v2.runtime.unmarshaller.UnmarshallingContext#1206
} catch (Exception e) {
// Reflection problem. Ignore that and return empty list.
}
// something went wrong - return empty list
return Collections.emptyList();
}
@Override
public Collection getExpectedElements() {
return getExpectedEntities("getCurrentExpectedElements");
}
@Override
public Collection getExpectedAttributes() {
if (canHandleAttributes()) {
return getExpectedEntities("getCurrentExpectedAttributes");
}
return Collections.emptyList();
}
@Override
public Map getExpectedElementsMap() {
final Collection expectedElements = getExpectedElements();
if (!expectedElements.isEmpty()) {
qNamesOfExpElems = qnameCollectionToMap(expectedElements, true);
}
return qNamesOfExpElems;
}
@Override
public Map getExpectedAttributesMap() {
final Collection expectedAttributes = getExpectedAttributes();
if (!expectedAttributes.isEmpty()) {
qNamesOfExpAttrs = qnameCollectionToMap(expectedAttributes, false);
}
return qNamesOfExpAttrs;
}
@Override
public boolean canHandleAttributes() {
return JSONHelper.isNaturalNotationEnabled();
}
@Override
public Type getEntityType(QName entity, boolean isAttribute) {
final NodeWrapper peek = processedNodes.getLast();
Object rawType;
try {
Class runtimeReferencePropertyInfo = systemClassLoader
.loadClass("com.sun.xml.internal.bind.v2.model.runtime.RuntimePropertyInfo");
rawType = runtimeReferencePropertyInfo.getMethod("getRawType").invoke(peek.runtimePropertyInfo);
} catch (Exception e) {
rawType = null;
}
return peek.runtimePropertyInfo == null ? null : (Type) rawType;
}
@Override
public Type getIndividualType() {
final NodeWrapper peek = processedNodes.getLast();
Object individualType = null;
try {
Class runtimeReferencePropertyInfo = systemClassLoader
.loadClass("com.sun.xml.internal.bind.v2.model.runtime.RuntimePropertyInfo");
final Boolean isCollection = (Boolean) runtimeReferencePropertyInfo.getMethod("isCollection").invoke(peek.runtimePropertyInfo);
if (isCollection) {
individualType = runtimeReferencePropertyInfo.getMethod("getIndividualType").invoke(peek.runtimePropertyInfo);
}
} catch (Exception e) {
individualType = null;
}
return peek.runtimePropertyInfo == null ? null : (Type) individualType;
}
@Override
public void startElement(final QName name) {
if (!isReader) {
processedNodes.add(new NodeWrapper(
processedNodes.isEmpty() ? null : processedNodes.getLast(),
getCurrentElementRuntimePropertyInfo()));
}
}
@Override
public void handleAttribute(final QName attributeName, final String value) {
startElement(attributeName);
}
private Object getCurrentElementRuntimePropertyInfo() {
try {
final Class aClass = systemClassLoader.loadClass("com.sun.xml.internal.bind.v2.runtime.XMLSerializer");
// XMLSerializer
final Object xs = aClass.getMethod("getInstance").invoke(null);
final Method getCurrentProperty = aClass.getMethod("getCurrentProperty");
// Property
final Object cp = (xs == null) ? null : getCurrentProperty.invoke(xs);
final Class bClass = systemClassLoader.loadClass("com.sun.xml.internal.bind.v2.runtime.property.Property");
final Method getInfo = bClass.getMethod("getInfo");
// RuntimePropertyInfo
return (cp == null) ? null : getInfo.invoke(cp);
} catch (Exception e) {
// Reflection problem.
return null;
}
}
@Override
public boolean isArrayCollection() {
Object runtimePropertyInfo = isReader ? null : getCurrentElementRuntimePropertyInfo();
if (runtimePropertyInfo == null && !processedNodes.isEmpty()) {
final NodeWrapper peek = processedNodes.getLast();
runtimePropertyInfo = peek.runtimePropertyInfo;
}
boolean isCollection = false;
try {
Class runtimeReferencePropertyInfo = systemClassLoader
.loadClass("com.sun.xml.internal.bind.v2.model.runtime.RuntimePropertyInfo");
isCollection = (Boolean) runtimeReferencePropertyInfo.getMethod("isCollection").invoke(runtimePropertyInfo);
} catch (Exception e) {
// Reflection problem.
isCollection = false;
}
return runtimePropertyInfo != null && isCollection && !isWildcardElement(runtimePropertyInfo);
}
@Override
public boolean isSameArrayCollection() {
final int size = processedNodes.size();
if (size >= 2) {
final NodeWrapper last = processedNodes.getLast();
final NodeWrapper beforeLast = processedNodes.get(size - 2);
if (last.equals(beforeLast)) {
return true;
}
}
return false;
}
@Override
public boolean hasSubElements() {
if (isReader) {
return !getExpectedElements().isEmpty();
} else {
return !processedNodes.isEmpty()
&& processedNodes.getLast() != getCurrentElementRuntimePropertyInfo();
}
}
@Override
public void endElement(QName name) {
if (!isReader) {
processedNodes.removeLast();
}
}
private boolean isWildcardElement(Object ri) {
try {
Class runtimeReferencePropertyInfo = systemClassLoader
.loadClass("com.sun.xml.internal.bind.v2.model.runtime.RuntimeReferencePropertyInfo");
return runtimeReferencePropertyInfo.getMethod("getWildcard").invoke(ri) != null;
} catch (Exception e) {
return false;
}
}
}