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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; } } }





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