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Java example source code file (JAXBContextImpl.java)

This example Java source code file (JAXBContextImpl.java) is included in the alvinalexander.com "Java Source Code Warehouse" project. The intent of this project is to help you "Learn Java by Example" TM.

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Java - Java tags/keywords

class, classbeaninfoimpl, dom, elementbeaninfoimpl, jaxbcontextbuilder, jaxbeaninfo, jaxbexception, linkedhashmap, map, notnull, override, parser, qname, reflection, runtimeclassinfo, runtimetypeinfoset, sax, string, util, xml

The JAXBContextImpl.java Java example source code

/*
 * Copyright (c) 1997, 2013, Oracle and/or its affiliates. All rights reserved.
 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
 *
 * This code is free software; you can redistribute it and/or modify it
 * under the terms of the GNU General Public License version 2 only, as
 * published by the Free Software Foundation.  Oracle designates this
 * particular file as subject to the "Classpath" exception as provided
 * by Oracle in the LICENSE file that accompanied this code.
 *
 * This code is distributed in the hope that it will be useful, but WITHOUT
 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
 * version 2 for more details (a copy is included in the LICENSE file that
 * accompanied this code).
 *
 * You should have received a copy of the GNU General Public License version
 * 2 along with this work; if not, write to the Free Software Foundation,
 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
 *
 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
 * or visit www.oracle.com if you need additional information or have any
 * questions.
 */

package com.sun.xml.internal.bind.v2.runtime;

import java.io.IOException;
import java.lang.ref.WeakReference;
import java.lang.reflect.Field;
import java.lang.reflect.Method;
import java.lang.reflect.Type;
import java.util.Arrays;
import java.util.Collection;
import java.util.Collections;
import java.util.Comparator;
import java.util.HashMap;
import java.util.HashSet;
import java.util.LinkedHashMap;
import java.util.List;
import java.util.Map;
import java.util.Map.Entry;
import java.util.Set;
import java.util.TreeSet;
import javax.xml.bind.Binder;
import javax.xml.bind.JAXBContext;
import javax.xml.bind.JAXBElement;
import javax.xml.bind.JAXBException;
import javax.xml.bind.JAXBIntrospector;
import javax.xml.bind.Marshaller;
import javax.xml.bind.SchemaOutputResolver;
import javax.xml.bind.Unmarshaller;
import javax.xml.bind.Validator;
import javax.xml.bind.annotation.XmlAttachmentRef;
import javax.xml.bind.annotation.XmlList;
import javax.xml.bind.annotation.XmlNs;
import javax.xml.bind.annotation.XmlSchema;
import javax.xml.bind.annotation.adapters.XmlJavaTypeAdapter;
import javax.xml.namespace.QName;
import javax.xml.parsers.DocumentBuilder;
import javax.xml.parsers.DocumentBuilderFactory;
import javax.xml.parsers.FactoryConfigurationError;
import javax.xml.parsers.ParserConfigurationException;
import javax.xml.transform.Result;
import javax.xml.transform.Transformer;
import javax.xml.transform.TransformerConfigurationException;
import javax.xml.transform.TransformerFactory;
import javax.xml.transform.sax.SAXTransformerFactory;
import javax.xml.transform.sax.TransformerHandler;

import com.sun.istack.internal.NotNull;
import com.sun.istack.internal.Pool;
import com.sun.xml.internal.bind.v2.WellKnownNamespace;
import com.sun.xml.internal.bind.api.AccessorException;
import com.sun.xml.internal.bind.api.Bridge;
import com.sun.xml.internal.bind.api.BridgeContext;
import com.sun.xml.internal.bind.api.CompositeStructure;
import com.sun.xml.internal.bind.api.ErrorListener;
import com.sun.xml.internal.bind.api.JAXBRIContext;
import com.sun.xml.internal.bind.api.RawAccessor;
import com.sun.xml.internal.bind.api.TypeReference;
import com.sun.xml.internal.bind.unmarshaller.DOMScanner;
import com.sun.xml.internal.bind.util.Which;
import com.sun.xml.internal.bind.v2.model.annotation.RuntimeAnnotationReader;
import com.sun.xml.internal.bind.v2.model.annotation.RuntimeInlineAnnotationReader;
import com.sun.xml.internal.bind.v2.model.core.Adapter;
import com.sun.xml.internal.bind.v2.model.core.NonElement;
import com.sun.xml.internal.bind.v2.model.core.Ref;
import com.sun.xml.internal.bind.v2.model.impl.RuntimeBuiltinLeafInfoImpl;
import com.sun.xml.internal.bind.v2.model.impl.RuntimeModelBuilder;
import com.sun.xml.internal.bind.v2.model.nav.Navigator;
import com.sun.xml.internal.bind.v2.model.runtime.RuntimeArrayInfo;
import com.sun.xml.internal.bind.v2.model.runtime.RuntimeBuiltinLeafInfo;
import com.sun.xml.internal.bind.v2.model.runtime.RuntimeClassInfo;
import com.sun.xml.internal.bind.v2.model.runtime.RuntimeElementInfo;
import com.sun.xml.internal.bind.v2.model.runtime.RuntimeEnumLeafInfo;
import com.sun.xml.internal.bind.v2.model.runtime.RuntimeLeafInfo;
import com.sun.xml.internal.bind.v2.model.runtime.RuntimeTypeInfo;
import com.sun.xml.internal.bind.v2.model.runtime.RuntimeTypeInfoSet;
import com.sun.xml.internal.bind.v2.runtime.output.Encoded;
import com.sun.xml.internal.bind.v2.runtime.property.AttributeProperty;
import com.sun.xml.internal.bind.v2.runtime.property.Property;
import com.sun.xml.internal.bind.v2.runtime.reflect.Accessor;
import com.sun.xml.internal.bind.v2.runtime.unmarshaller.Loader;
import com.sun.xml.internal.bind.v2.runtime.unmarshaller.TagName;
import com.sun.xml.internal.bind.v2.runtime.unmarshaller.UnmarshallerImpl;
import com.sun.xml.internal.bind.v2.runtime.unmarshaller.UnmarshallingContext;
import com.sun.xml.internal.bind.v2.schemagen.XmlSchemaGenerator;
import com.sun.xml.internal.bind.v2.util.EditDistance;
import com.sun.xml.internal.bind.v2.util.QNameMap;
import com.sun.xml.internal.bind.v2.util.XmlFactory;
import com.sun.xml.internal.txw2.output.ResultFactory;

import org.w3c.dom.Document;
import org.w3c.dom.Element;
import org.w3c.dom.Node;
import org.xml.sax.SAXException;
import org.xml.sax.SAXParseException;

/**
 * This class provides the implementation of JAXBContext.
 *
 */
public final class JAXBContextImpl extends JAXBRIContext {

    /**
     * All the bridge classes.
     */
    private final Map<TypeReference,Bridge> bridges = new LinkedHashMap();

    /**
     * Shared instance of {@link TransformerFactory}.
     * Lock before use, because a {@link TransformerFactory} is not thread-safe
     * whereas {@link JAXBContextImpl} is.
     * Lazily created.
     */
    private volatile static SAXTransformerFactory tf;

    /**
     * Shared instance of {@link DocumentBuilder}.
     * Lock before use. Lazily created.
     */
    private static DocumentBuilder db;

    private final QNameMap<JaxBeanInfo> rootMap = new QNameMap();
    private final HashMap<QName,JaxBeanInfo> typeMap = new HashMap();

    /**
     * Map from JAXB-bound {@link Class} to its {@link JaxBeanInfo}.
     */
    private final Map<Class,JaxBeanInfo> beanInfoMap = new LinkedHashMap();

    /**
     * All created {@link JaxBeanInfo}s.
     * Updated from each {@link JaxBeanInfo}s constructors to avoid infinite recursion
     * for a cyclic reference.
     *
     * <p>
     * This map is only used while the {@link JAXBContextImpl} is built and set to null
     * to avoid keeping references too long.
     */
    protected Map<RuntimeTypeInfo,JaxBeanInfo> beanInfos = new LinkedHashMap();

    private final Map<Class/*scope*/,Map elements = new LinkedHashMap>();

    /**
     * Pool of {@link Marshaller}s.
     */
    public final Pool<Marshaller> marshallerPool = new Pool.Impl() {
        protected @NotNull Marshaller create() {
            return createMarshaller();
        }
    };

    public final Pool<Unmarshaller> unmarshallerPool = new Pool.Impl() {
        protected @NotNull Unmarshaller create() {
            return createUnmarshaller();
        }
    };

    /**
     * Used to assign indices to known names in this grammar.
     * Reset to null once the build phase is completed.
     */
    public NameBuilder nameBuilder = new NameBuilder();

    /**
     * Keeps the list of known names.
     * This field is set once the build pahse is completed.
     */
    public final NameList nameList;

    /**
     * Input to the JAXBContext.newInstance, so that we can recreate
     * {@link RuntimeTypeInfoSet} whenever we need.
     */
    private final String defaultNsUri;
    private final Class[] classes;

    /**
     * true to reorder attributes lexicographically in preparation of the c14n support.
     */
    protected final boolean c14nSupport;

    /**
     * Flag that user has provided a custom AccessorFactory for JAXB to use
     */
    public final boolean xmlAccessorFactorySupport;

    /**
     * @see JAXBRIContext#TREAT_EVERYTHING_NILLABLE
     */
    public final boolean allNillable;

    /**
     * Store properties, so that they can be recovered in the run (is here because of JSON encoding of Jersey).
     */
    public final boolean retainPropertyInfo;

    /**
     * Suppress reflection accessor warnings.
     */
    public final boolean supressAccessorWarnings;

    /**
     * Improved xsi type handling.
     */
    public final boolean improvedXsiTypeHandling;

    /**
     * Disable security processing.
     */
    public final boolean disableSecurityProcessing;

    private WeakReference<RuntimeTypeInfoSet> typeInfoSetCache;

    private @NotNull RuntimeAnnotationReader annotationReader;

    private /*almost final*/ boolean hasSwaRef;
    private final @NotNull Map<Class,Class> subclassReplacements;

    /**
     * If true, we aim for faster {@link JAXBContext} instantiation performance,
     * instead of going after efficient sustained unmarshalling/marshalling performance.
     *
     * @since 2.0.4
     */
    public final boolean fastBoot;

    private Set<XmlNs> xmlNsSet = null;

    /**
     * Returns declared XmlNs annotations (from package-level annotation XmlSchema
     *
     * @return set of all present XmlNs annotations
     */
    public Set<XmlNs> getXmlNsSet() {
        return xmlNsSet;
    }

    private JAXBContextImpl(JAXBContextBuilder builder) throws JAXBException {

        this.defaultNsUri = builder.defaultNsUri;
        this.retainPropertyInfo = builder.retainPropertyInfo;
        this.annotationReader = builder.annotationReader;
        this.subclassReplacements = builder.subclassReplacements;
        this.c14nSupport = builder.c14nSupport;
        this.classes = builder.classes;
        this.xmlAccessorFactorySupport = builder.xmlAccessorFactorySupport;
        this.allNillable = builder.allNillable;
        this.supressAccessorWarnings = builder.supressAccessorWarnings;
        this.improvedXsiTypeHandling = builder.improvedXsiTypeHandling;
        this.disableSecurityProcessing = builder.disableSecurityProcessing;

        Collection<TypeReference> typeRefs = builder.typeRefs;

        boolean fastB;
        try {
            fastB = Boolean.getBoolean(JAXBContextImpl.class.getName()+".fastBoot");
        } catch (SecurityException e) {
            fastB = false;
        }
        this.fastBoot = fastB;

        RuntimeTypeInfoSet typeSet = getTypeInfoSet();

        // at least prepare the empty table so that we don't have to check for null later
        elements.put(null,new LinkedHashMap<QName, ElementBeanInfoImpl>());

        // recognize leaf bean infos
        for( RuntimeBuiltinLeafInfo leaf : RuntimeBuiltinLeafInfoImpl.builtinBeanInfos ) {
            LeafBeanInfoImpl<?> bi = new LeafBeanInfoImpl(this,leaf);
            beanInfoMap.put(leaf.getClazz(),bi);
            for( QName t : bi.getTypeNames() )
                typeMap.put(t,bi);
        }

        for (RuntimeEnumLeafInfo e : typeSet.enums().values()) {
            JaxBeanInfo<?> bi = getOrCreate(e);
            for (QName qn : bi.getTypeNames())
                typeMap.put( qn, bi );
            if(e.isElement())
                rootMap.put( e.getElementName(), bi );
        }

        for (RuntimeArrayInfo a : typeSet.arrays().values()) {
            JaxBeanInfo<?> ai = getOrCreate(a);
            for (QName qn : ai.getTypeNames())
                typeMap.put( qn, ai );
        }

        for( Entry<Class, ? extends RuntimeClassInfo> e : typeSet.beans().entrySet() ) {
            ClassBeanInfoImpl<?> bi = getOrCreate(e.getValue());

            XmlSchema xs = this.annotationReader.getPackageAnnotation(XmlSchema.class, e.getKey(), null);
            if(xs != null) {
                if(xs.xmlns() != null && xs.xmlns().length > 0) {
                    if(xmlNsSet == null)
                        xmlNsSet = new HashSet<XmlNs>();
                    xmlNsSet.addAll(Arrays.asList(xs.xmlns()));
                }
            }

            if(bi.isElement())
                rootMap.put( e.getValue().getElementName(), bi );

            for (QName qn : bi.getTypeNames())
                typeMap.put( qn, bi );
        }

        // fill in element mappings
        for( RuntimeElementInfo n : typeSet.getAllElements() ) {
            ElementBeanInfoImpl bi = getOrCreate(n);
            if(n.getScope()==null)
                rootMap.put(n.getElementName(),bi);

            RuntimeClassInfo scope = n.getScope();
            Class scopeClazz = scope==null?null:scope.getClazz();
            Map<QName,ElementBeanInfoImpl> m = elements.get(scopeClazz);
            if(m==null) {
                m = new LinkedHashMap<QName, ElementBeanInfoImpl>();
                elements.put(scopeClazz,m);
            }
            m.put(n.getElementName(),bi);
        }

        // this one is so that we can handle plain JAXBElements.
        beanInfoMap.put(JAXBElement.class,new ElementBeanInfoImpl(this));
        // another special BeanInfoImpl just for marshalling
        beanInfoMap.put(CompositeStructure.class,new CompositeStructureBeanInfo(this));

        getOrCreate(typeSet.getAnyTypeInfo());

        // then link them all!
        for (JaxBeanInfo bi : beanInfos.values())
            bi.link(this);

        // register primitives for boxed types just to make GrammarInfo fool-proof
        for( Map.Entry<Class,Class> e : RuntimeUtil.primitiveToBox.entrySet() )
            beanInfoMap.put( e.getKey(), beanInfoMap.get(e.getValue()) );

        // build bridges
        Navigator<Type, Class, Field, Method> nav = typeSet.getNavigator();

        for (TypeReference tr : typeRefs) {
            XmlJavaTypeAdapter xjta = tr.get(XmlJavaTypeAdapter.class);
            Adapter<Type,Class> a=null;
            XmlList xl = tr.get(XmlList.class);

            // eventually compute the in-memory type
            Class erasedType = (Class) nav.erasure(tr.type);

            if(xjta!=null) {
                a = new Adapter<Type,Class>(xjta.value(),nav);
            }
            if(tr.get(XmlAttachmentRef.class)!=null) {
                a = new Adapter<Type,Class>(SwaRefAdapter.class,nav);
                hasSwaRef = true;
            }

            if(a!=null) {
                erasedType = (Class) nav.erasure(a.defaultType);
            }

            Name name = nameBuilder.createElementName(tr.tagName);

            InternalBridge bridge;
            if(xl==null)
                bridge = new BridgeImpl(this, name,getBeanInfo(erasedType,true),tr);
            else
                bridge = new BridgeImpl(this, name,new ValueListBeanInfoImpl(this,erasedType),tr);

            if(a!=null)
                bridge = new BridgeAdapter(bridge,a.adapterType);

            bridges.put(tr,bridge);
        }

        this.nameList = nameBuilder.conclude();

        for (JaxBeanInfo bi : beanInfos.values())
            bi.wrapUp();

        // no use for them now
        nameBuilder = null;
        beanInfos = null;
    }

    /**
     * True if this JAXBContext has {@link XmlAttachmentRef}.
     */
    public boolean hasSwaRef() {
        return hasSwaRef;
    }

    public RuntimeTypeInfoSet getRuntimeTypeInfoSet() {
        try {
            return getTypeInfoSet();
        } catch (IllegalAnnotationsException e) {
            // impossible, once the model is constructred
            throw new AssertionError(e);
        }
    }

    /**
     * Creates a {@link RuntimeTypeInfoSet}.
     */
    public RuntimeTypeInfoSet getTypeInfoSet() throws IllegalAnnotationsException {

        // check cache
        if(typeInfoSetCache!=null) {
            RuntimeTypeInfoSet r = typeInfoSetCache.get();
            if(r!=null)
                return r;
        }

        final RuntimeModelBuilder builder = new RuntimeModelBuilder(this,annotationReader,subclassReplacements,defaultNsUri);

        IllegalAnnotationsException.Builder errorHandler = new IllegalAnnotationsException.Builder();
        builder.setErrorHandler(errorHandler);

        for( Class c : classes ) {
            if(c==CompositeStructure.class)
                // CompositeStructure doesn't have TypeInfo, so skip it.
                // We'll add JaxBeanInfo for this later automatically
                continue;
            builder.getTypeInfo(new Ref<Type,Class>(c));
        }

        this.hasSwaRef |= builder.hasSwaRef;
        RuntimeTypeInfoSet r = builder.link();

        errorHandler.check();
        assert r!=null : "if no error was reported, the link must be a success";

        typeInfoSetCache = new WeakReference<RuntimeTypeInfoSet>(r);

        return r;
    }


    public ElementBeanInfoImpl getElement(Class scope, QName name) {
        Map<QName,ElementBeanInfoImpl> m = elements.get(scope);
        if(m!=null) {
            ElementBeanInfoImpl bi = m.get(name);
            if(bi!=null)
                return bi;
        }
        m = elements.get(null);
        return m.get(name);
    }





    private ElementBeanInfoImpl getOrCreate( RuntimeElementInfo rei ) {
        JaxBeanInfo bi = beanInfos.get(rei);
        if(bi!=null)    return (ElementBeanInfoImpl)bi;

        // all elements share the same type, so we can't register them to beanInfoMap
        return new ElementBeanInfoImpl(this, rei);
    }

    protected JaxBeanInfo getOrCreate( RuntimeEnumLeafInfo eli ) {
        JaxBeanInfo bi = beanInfos.get(eli);
        if(bi!=null)    return bi;
        bi = new LeafBeanInfoImpl(this,eli);
        beanInfoMap.put(bi.jaxbType,bi);
        return bi;
    }

    protected ClassBeanInfoImpl getOrCreate( RuntimeClassInfo ci ) {
        ClassBeanInfoImpl bi = (ClassBeanInfoImpl)beanInfos.get(ci);
        if(bi!=null)    return bi;
        bi = new ClassBeanInfoImpl(this,ci);
        beanInfoMap.put(bi.jaxbType,bi);
        return bi;
    }

    protected JaxBeanInfo getOrCreate( RuntimeArrayInfo ai ) {
        JaxBeanInfo abi = beanInfos.get(ai);
        if(abi!=null)   return abi;

        abi = new ArrayBeanInfoImpl(this,ai);

        beanInfoMap.put(ai.getType(),abi);
        return abi;
    }

    public JaxBeanInfo getOrCreate(RuntimeTypeInfo e) {
        if(e instanceof RuntimeElementInfo)
            return getOrCreate((RuntimeElementInfo)e);
        if(e instanceof RuntimeClassInfo)
            return getOrCreate((RuntimeClassInfo)e);
        if(e instanceof RuntimeLeafInfo) {
            JaxBeanInfo bi = beanInfos.get(e); // must have been created
            assert bi!=null;
            return bi;
        }
        if(e instanceof RuntimeArrayInfo)
            return getOrCreate((RuntimeArrayInfo)e);
        if(e.getType()==Object.class) {
            // anyType
            JaxBeanInfo bi = beanInfoMap.get(Object.class);
            if(bi==null) {
                bi = new AnyTypeBeanInfo(this,e);
                beanInfoMap.put(Object.class,bi);
            }
            return bi;
        }

        throw new IllegalArgumentException();
    }

    /**
     * Gets the {@link JaxBeanInfo} object that can handle
     * the given JAXB-bound object.
     *
     * <p>
     * This method traverses the base classes of the given object.
     *
     * @return null
     *      if <tt>c isn't a JAXB-bound class and fatal==false.
     */
    public final JaxBeanInfo getBeanInfo(Object o) {
        // don't allow xs:anyType beanInfo to handle all the unbound objects
        for( Class c=o.getClass(); c!=Object.class; c=c.getSuperclass()) {
            JaxBeanInfo bi = beanInfoMap.get(c);
            if(bi!=null)    return bi;
        }
        if(o instanceof Element)
            return beanInfoMap.get(Object.class);   // return the BeanInfo for xs:anyType
        for( Class c : o.getClass().getInterfaces()) {
            JaxBeanInfo bi = beanInfoMap.get(c);
            if(bi!=null)    return bi;
        }
        return null;
    }

    /**
     * Gets the {@link JaxBeanInfo} object that can handle
     * the given JAXB-bound object.
     *
     * @param fatal
     *      if true, the failure to look up will throw an exception.
     *      Otherwise it will just return null.
     */
    public final JaxBeanInfo getBeanInfo(Object o,boolean fatal) throws JAXBException {
        JaxBeanInfo bi = getBeanInfo(o);
        if(bi!=null)    return bi;
        if(fatal) {
            if(o instanceof Document)
                throw new JAXBException(Messages.ELEMENT_NEEDED_BUT_FOUND_DOCUMENT.format(o.getClass()));
            throw new JAXBException(Messages.UNKNOWN_CLASS.format(o.getClass()));
        }
        return null;
    }

    /**
     * Gets the {@link JaxBeanInfo} object that can handle
     * the given JAXB-bound class.
     *
     * <p>
     * This method doesn't look for base classes.
     *
     * @return null
     *      if <tt>c isn't a JAXB-bound class and fatal==false.
     */
    public final <T> JaxBeanInfo getBeanInfo(Class clazz) {
        return (JaxBeanInfo<T>)beanInfoMap.get(clazz);
    }

    /**
     * Gets the {@link JaxBeanInfo} object that can handle
     * the given JAXB-bound class.
     *
     * @param fatal
     *      if true, the failure to look up will throw an exception.
     *      Otherwise it will just return null.
     */
    public final <T> JaxBeanInfo getBeanInfo(Class clazz,boolean fatal) throws JAXBException {
        JaxBeanInfo<T> bi = getBeanInfo(clazz);
        if(bi!=null)    return bi;
        if(fatal)
            throw new JAXBException(clazz.getName()+" is not known to this context");
        return null;
    }

    /**
     * Based on the tag name, determine what object to unmarshal,
     * and then set a new object and its loader to the current unmarshaller state.
     *
     * @return
     *      null if the given name pair is not recognized.
     */
    public final Loader selectRootLoader( UnmarshallingContext.State state, TagName tag ) {
        JaxBeanInfo beanInfo = rootMap.get(tag.uri,tag.local);
        if(beanInfo==null)
            return null;

        return beanInfo.getLoader(this,true);
    }

    /**
     * Gets the {@link JaxBeanInfo} for the given named XML Schema type.
     *
     * @return
     *      null if the type name is not recognized. For schema
     *      languages other than XML Schema, this method always
     *      returns null.
     */
    public JaxBeanInfo getGlobalType(QName name) {
        return typeMap.get(name);
    }

    /**
     * Finds a type name that this context recognizes which is
     * "closest" to the given type name.
     *
     * <p>
     * This method is used for error recovery.
     */
    public String getNearestTypeName(QName name) {
        String[] all = new String[typeMap.size()];
        int i=0;
        for (QName qn : typeMap.keySet()) {
            if(qn.getLocalPart().equals(name.getLocalPart()))
                return qn.toString();  // probably a match, as people often gets confused about namespace.
            all[i++] = qn.toString();
        }

        String nearest = EditDistance.findNearest(name.toString(), all);

        if(EditDistance.editDistance(nearest,name.toString())>10)
            return null;    // too far apart.

        return nearest;
    }

    /**
     * Returns the set of valid root tag names.
     * For diagnostic use.
     */
    public Set<QName> getValidRootNames() {
        Set<QName> r = new TreeSet(QNAME_COMPARATOR);
        for (QNameMap.Entry e : rootMap.entrySet()) {
            r.add(e.createQName());
        }
        return r;
    }

    /**
     * Cache of UTF-8 encoded local names to improve the performance for the marshalling.
     */
    private Encoded[] utf8nameTable;

    public synchronized Encoded[] getUTF8NameTable() {
        if(utf8nameTable==null) {
            Encoded[] x = new Encoded[nameList.localNames.length];
            for( int i=0; i<x.length; i++ ) {
                Encoded e = new Encoded(nameList.localNames[i]);
                e.compact();
                x[i] = e;
            }
            utf8nameTable = x;
        }
        return utf8nameTable;
    }

    public int getNumberOfLocalNames() {
        return nameList.localNames.length;
    }

    public int getNumberOfElementNames() {
        return nameList.numberOfElementNames;
    }

    public int getNumberOfAttributeNames() {
        return nameList.numberOfAttributeNames;
    }

    /**
     * Creates a new identity transformer.
     */
    static Transformer createTransformer(boolean disableSecureProcessing) {
        try {
            if (tf==null) {
                synchronized(JAXBContextImpl.class) {
                    if (tf==null) {
                        tf = (SAXTransformerFactory)XmlFactory.createTransformerFactory(disableSecureProcessing);
                    }
                }
            }
            return tf.newTransformer();
        } catch (TransformerConfigurationException e) {
            throw new Error(e); // impossible
        }
    }

    /**
     * Creates a new identity transformer.
     */
    public static TransformerHandler createTransformerHandler(boolean disableSecureProcessing) {
        try {
            if (tf==null) {
                synchronized(JAXBContextImpl.class) {
                    if (tf==null) {
                        tf = (SAXTransformerFactory)XmlFactory.createTransformerFactory(disableSecureProcessing);
                    }
                }
            }
            return tf.newTransformerHandler();
        } catch (TransformerConfigurationException e) {
            throw new Error(e); // impossible
        }
    }

    /**
     * Creates a new DOM document.
     */
    static Document createDom(boolean disableSecurityProcessing) {
        synchronized(JAXBContextImpl.class) {
            if(db==null) {
                try {
                    DocumentBuilderFactory dbf = XmlFactory.createDocumentBuilderFactory(disableSecurityProcessing);
                    db = dbf.newDocumentBuilder();
                } catch (ParserConfigurationException e) {
                    // impossible
                    throw new FactoryConfigurationError(e);
                }
            }
            return db.newDocument();
        }
    }

    public MarshallerImpl createMarshaller() {
        return new MarshallerImpl(this,null);
    }

    public UnmarshallerImpl createUnmarshaller() {
        return new UnmarshallerImpl(this,null);
    }

    public Validator createValidator() {
        throw new UnsupportedOperationException(Messages.NOT_IMPLEMENTED_IN_2_0.format());
    }

    @Override
    public JAXBIntrospector createJAXBIntrospector() {
        return new JAXBIntrospector() {
            public boolean isElement(Object object) {
                return getElementName(object)!=null;
            }

            public QName getElementName(Object jaxbElement) {
                try {
                    return JAXBContextImpl.this.getElementName(jaxbElement);
                } catch (JAXBException e) {
                    return null;
                }
            }
        };
    }

    private NonElement<Type,Class> getXmlType(RuntimeTypeInfoSet tis, TypeReference tr) {
        if(tr==null)
            throw new IllegalArgumentException();

        XmlJavaTypeAdapter xjta = tr.get(XmlJavaTypeAdapter.class);
        XmlList xl = tr.get(XmlList.class);

        Ref<Type,Class> ref = new Ref(annotationReader, tis.getNavigator(), tr.type, xjta, xl );

        return tis.getTypeInfo(ref);
    }

    @Override
    public void generateEpisode(Result output) {
        if(output==null)
            throw new IllegalArgumentException();
        createSchemaGenerator().writeEpisodeFile(ResultFactory.createSerializer(output));
    }

    @Override
    @SuppressWarnings("ThrowableInitCause")
    public void generateSchema(SchemaOutputResolver outputResolver) throws IOException {
        if(outputResolver==null)
            throw new IOException(Messages.NULL_OUTPUT_RESOLVER.format());

        final SAXParseException[] e = new SAXParseException[1];
        final SAXParseException[] w = new SAXParseException[1];

        createSchemaGenerator().write(outputResolver, new ErrorListener() {
            public void error(SAXParseException exception) {
                e[0] = exception;
            }

            public void fatalError(SAXParseException exception) {
                e[0] = exception;
            }

            public void warning(SAXParseException exception) {
                w[0] = exception;
            }

            public void info(SAXParseException exception) {}
        });

        if (e[0]!=null) {
            IOException x = new IOException(Messages.FAILED_TO_GENERATE_SCHEMA.format());
            x.initCause(e[0]);
            throw x;
        }
        if (w[0]!=null) {
            IOException x = new IOException(Messages.ERROR_PROCESSING_SCHEMA.format());
            x.initCause(w[0]);
            throw x;
        }
    }

    private XmlSchemaGenerator<Type,Class,Field,Method> createSchemaGenerator() {
        RuntimeTypeInfoSet tis;
        try {
            tis = getTypeInfoSet();
        } catch (IllegalAnnotationsException e) {
            // this shouldn't happen because we've already
            throw new AssertionError(e);
        }

        XmlSchemaGenerator<Type,Class,Field,Method> xsdgen =
                new XmlSchemaGenerator<Type,Class,Field,Method>(tis.getNavigator(),tis);

        // JAX-RPC uses Bridge objects that collide with
        // @XmlRootElement.
        // we will avoid collision here
        Set<QName> rootTagNames = new HashSet();
        for (RuntimeElementInfo ei : tis.getAllElements()) {
            rootTagNames.add(ei.getElementName());
        }
        for (RuntimeClassInfo ci : tis.beans().values()) {
            if(ci.isElement())
                rootTagNames.add(ci.asElement().getElementName());
        }

        for (TypeReference tr : bridges.keySet()) {
            if(rootTagNames.contains(tr.tagName))
                continue;

            if(tr.type==void.class || tr.type==Void.class) {
                xsdgen.add(tr.tagName,false,null);
            } else
            if(tr.type==CompositeStructure.class) {
                // this is a special class we introduced for JAX-WS that we *don't* want in the schema
            } else {
                NonElement<Type,Class> typeInfo = getXmlType(tis,tr);
                xsdgen.add(tr.tagName, !tis.getNavigator().isPrimitive(tr.type),typeInfo);
            }
        }
        return xsdgen;
    }

    public QName getTypeName(TypeReference tr) {
        try {
            NonElement<Type,Class> xt = getXmlType(getTypeInfoSet(),tr);
            if(xt==null)    throw new IllegalArgumentException();
            return xt.getTypeName();
        } catch (IllegalAnnotationsException e) {
            // impossible given that JAXBRIContext has been successfully built in the first place
            throw new AssertionError(e);
        }
    }

    @Override
    public <T> Binder createBinder(Class domType) {
        if(domType==Node.class)
            return (Binder<T>)createBinder();
        else
            return super.createBinder(domType);
    }

    @Override
    public Binder<Node> createBinder() {
        return new BinderImpl<Node>(this,new DOMScanner());
    }

    public QName getElementName(Object o) throws JAXBException {
        JaxBeanInfo bi = getBeanInfo(o,true);
        if(!bi.isElement())
            return null;
        return new QName(bi.getElementNamespaceURI(o),bi.getElementLocalName(o));
    }

    public QName getElementName(Class o) throws JAXBException {
        JaxBeanInfo bi = getBeanInfo(o,true);
        if(!bi.isElement())
            return null;
        return new QName(bi.getElementNamespaceURI(o),bi.getElementLocalName(o));
    }

    public Bridge createBridge(TypeReference ref) {
        return bridges.get(ref);
    }

    public @NotNull BridgeContext createBridgeContext() {
        return new BridgeContextImpl(this);
    }

    public RawAccessor getElementPropertyAccessor(Class wrapperBean, String nsUri, String localName) throws JAXBException {
        JaxBeanInfo bi = getBeanInfo(wrapperBean,true);
        if(!(bi instanceof ClassBeanInfoImpl))
            throw new JAXBException(wrapperBean+" is not a bean");

        for( ClassBeanInfoImpl cb = (ClassBeanInfoImpl) bi; cb!=null; cb=cb.superClazz) {
            for (Property p : cb.properties) {
                final Accessor acc = p.getElementPropertyAccessor(nsUri,localName);
                if(acc!=null)
                    return new RawAccessor() {
                        // Accessor.set/get are designed for unmarshaller/marshaller, and hence
                        // they go through an adapter behind the scene.
                        // this isn't desirable for JAX-WS, which essentially uses this method
                        // just as a reflection library. So use the "unadapted" version to
                        // achieve the desired semantics
                        public Object get(Object bean) throws AccessorException {
                            return acc.getUnadapted(bean);
                        }

                        public void set(Object bean, Object value) throws AccessorException {
                            acc.setUnadapted(bean,value);
                        }
                    };
            }
        }
        throw new JAXBException(new QName(nsUri,localName)+" is not a valid property on "+wrapperBean);
    }

    public List<String> getKnownNamespaceURIs() {
        return Arrays.asList(nameList.namespaceURIs);
    }

    public String getBuildId() {
        Package pkg = getClass().getPackage();
        if(pkg==null)   return null;
        return pkg.getImplementationVersion();
    }

    @Override
    public String toString() {
        StringBuilder buf = new StringBuilder(Which.which(getClass()) + " Build-Id: " + getBuildId());
        buf.append("\nClasses known to this context:\n");

        Set<String> names = new TreeSet();  // sort them so that it's easy to read

        for (Class key : beanInfoMap.keySet())
            names.add(key.getName());

        for(String name: names)
            buf.append("  ").append(name).append('\n');

        return buf.toString();
    }

    /**
     * Gets the value of the xmime:contentType attribute on the given object, or null
     * if for some reason it couldn't be found, including any error.
     */
    public String getXMIMEContentType( Object o ) {
        JaxBeanInfo bi = getBeanInfo(o);
        if(!(bi instanceof ClassBeanInfoImpl))
            return null;

        ClassBeanInfoImpl cb = (ClassBeanInfoImpl) bi;
        for (Property p : cb.properties) {
            if (p instanceof AttributeProperty) {
                AttributeProperty ap = (AttributeProperty) p;
                if(ap.attName.equals(WellKnownNamespace.XML_MIME_URI,"contentType"))
                    try {
                        return (String)ap.xacc.print(o);
                    } catch (AccessorException e) {
                        return null;
                    } catch (SAXException e) {
                        return null;
                    } catch (ClassCastException e) {
                        return null;
                    }
            }
        }
        return null;
    }

    /**
     * Creates a {@link JAXBContextImpl} that includes the specified additional classes.
     */
    public JAXBContextImpl createAugmented(Class<?> clazz) throws JAXBException {
        Class[] newList = new Class[classes.length+1];
        System.arraycopy(classes,0,newList,0,classes.length);
        newList[classes.length] = clazz;

        JAXBContextBuilder builder = new JAXBContextBuilder(this);
        builder.setClasses(newList);
        return builder.build();
    }

    private static final Comparator<QName> QNAME_COMPARATOR = new Comparator() {
        public int compare(QName lhs, QName rhs) {
            int r = lhs.getLocalPart().compareTo(rhs.getLocalPart());
            if(r!=0)    return r;

            return lhs.getNamespaceURI().compareTo(rhs.getNamespaceURI());
        }
    };

    public static class JAXBContextBuilder {

        private boolean retainPropertyInfo = false;
        private boolean supressAccessorWarnings = false;
        private String defaultNsUri = "";
        private @NotNull RuntimeAnnotationReader annotationReader = new RuntimeInlineAnnotationReader();
        private @NotNull Map<Class,Class> subclassReplacements = Collections.emptyMap();
        private boolean c14nSupport = false;
        private Class[] classes;
        private Collection<TypeReference> typeRefs;
        private boolean xmlAccessorFactorySupport = false;
        private boolean allNillable;
        private boolean improvedXsiTypeHandling = true;
        private boolean disableSecurityProcessing = true;

        public JAXBContextBuilder() {};

        public JAXBContextBuilder(JAXBContextImpl baseImpl) {
            this.supressAccessorWarnings = baseImpl.supressAccessorWarnings;
            this.retainPropertyInfo = baseImpl.retainPropertyInfo;
            this.defaultNsUri = baseImpl.defaultNsUri;
            this.annotationReader = baseImpl.annotationReader;
            this.subclassReplacements = baseImpl.subclassReplacements;
            this.c14nSupport = baseImpl.c14nSupport;
            this.classes = baseImpl.classes;
            this.typeRefs = baseImpl.bridges.keySet();
            this.xmlAccessorFactorySupport = baseImpl.xmlAccessorFactorySupport;
            this.allNillable = baseImpl.allNillable;
            this.disableSecurityProcessing = baseImpl.disableSecurityProcessing;
        }

        public JAXBContextBuilder setRetainPropertyInfo(boolean val) {
            this.retainPropertyInfo = val;
            return this;
        }

        public JAXBContextBuilder setSupressAccessorWarnings(boolean val) {
            this.supressAccessorWarnings = val;
            return this;
        }

        public JAXBContextBuilder setC14NSupport(boolean val) {
            this.c14nSupport = val;
            return this;
        }

        public JAXBContextBuilder setXmlAccessorFactorySupport(boolean val) {
            this.xmlAccessorFactorySupport = val;
            return this;
        }

        public JAXBContextBuilder setDefaultNsUri(String val) {
            this.defaultNsUri = val;
            return this;
        }

        public JAXBContextBuilder setAllNillable(boolean val) {
            this.allNillable = val;
            return this;
        }

        public JAXBContextBuilder setClasses(Class[] val) {
            this.classes = val;
            return this;
        }

        public JAXBContextBuilder setAnnotationReader(RuntimeAnnotationReader val) {
            this.annotationReader = val;
            return this;
        }

        public JAXBContextBuilder setSubclassReplacements(Map<Class,Class> val) {
            this.subclassReplacements = val;
            return this;
        }

        public JAXBContextBuilder setTypeRefs(Collection<TypeReference> val) {
            this.typeRefs = val;
            return this;
        }

        public JAXBContextBuilder setImprovedXsiTypeHandling(boolean val) {
            this.improvedXsiTypeHandling = val;
            return this;
        }

        public JAXBContextBuilder setDisableSecurityProcessing(boolean val) {
            this.disableSecurityProcessing = val;
            return this;
        }

        public JAXBContextImpl build() throws JAXBException {

            // fool-proof
            if (this.defaultNsUri == null) {
                this.defaultNsUri = "";
            }

            if (this.subclassReplacements == null) {
                this.subclassReplacements = Collections.emptyMap();
            }

            if (this.annotationReader == null) {
                this.annotationReader = new RuntimeInlineAnnotationReader();
            }

            if (this.typeRefs == null) {
                this.typeRefs = Collections.<TypeReference>emptyList();
            }

            return new JAXBContextImpl(this);
        }

    }

}

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