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/*
* Copyright (c) 1997, 2018 Oracle and/or its affiliates. All rights reserved.
*
* This program and the accompanying materials are made available under the
* terms of the Eclipse Distribution License v. 1.0, which is available at
* http://www.eclipse.org/org/documents/edl-v10.php.
*
* SPDX-License-Identifier: BSD-3-Clause
*/
package com.sun.tools.xjc.reader.xmlschema;
import static com.sun.tools.xjc.reader.xmlschema.BGMBuilder.getName;
import java.util.Set;
import javax.xml.namespace.QName;
import com.sun.codemodel.JJavaName;
import com.sun.codemodel.JPackage;
import com.sun.istack.NotNull;
import com.sun.istack.Nullable;
import com.sun.tools.xjc.ErrorReceiver;
import com.sun.tools.xjc.model.CClassInfo;
import com.sun.tools.xjc.model.CClassInfoParent;
import com.sun.tools.xjc.model.CClassRef;
import com.sun.tools.xjc.model.CCustomizations;
import com.sun.tools.xjc.model.CElement;
import com.sun.tools.xjc.model.CElementInfo;
import com.sun.tools.xjc.model.Model;
import com.sun.tools.xjc.reader.Ring;
import com.sun.tools.xjc.reader.xmlschema.bindinfo.BIClass;
import com.sun.tools.xjc.reader.xmlschema.bindinfo.BIGlobalBinding;
import com.sun.tools.xjc.reader.xmlschema.bindinfo.BISchemaBinding;
import com.sun.tools.xjc.reader.xmlschema.bindinfo.BindInfo;
import com.sun.tools.xjc.reader.xmlschema.bindinfo.BIXSubstitutable;
import com.sun.tools.xjc.reader.xmlschema.ct.ComplexTypeFieldBuilder;
import com.sun.tools.xjc.reader.xmlschema.ct.ComplexTypeBindingMode;
import com.sun.xml.xsom.XSAnnotation;
import com.sun.xml.xsom.XSAttGroupDecl;
import com.sun.xml.xsom.XSAttributeDecl;
import com.sun.xml.xsom.XSAttributeUse;
import com.sun.xml.xsom.XSComplexType;
import com.sun.xml.xsom.XSComponent;
import com.sun.xml.xsom.XSContentType;
import com.sun.xml.xsom.XSDeclaration;
import com.sun.xml.xsom.XSElementDecl;
import com.sun.xml.xsom.XSFacet;
import com.sun.xml.xsom.XSIdentityConstraint;
import com.sun.xml.xsom.XSModelGroup;
import com.sun.xml.xsom.XSModelGroupDecl;
import com.sun.xml.xsom.XSNotation;
import com.sun.xml.xsom.XSParticle;
import com.sun.xml.xsom.XSSchema;
import com.sun.xml.xsom.XSSchemaSet;
import com.sun.xml.xsom.XSSimpleType;
import com.sun.xml.xsom.XSType;
import com.sun.xml.xsom.XSWildcard;
import com.sun.xml.xsom.XSXPath;
import org.xml.sax.Locator;
/**
* Default classBinder implementation. Honors {@code } customizations
* and default bindings.
*/
final class DefaultClassBinder implements ClassBinder
{
private final SimpleTypeBuilder stb = Ring.get(SimpleTypeBuilder.class);
private final Model model = Ring.get(Model.class);
protected final BGMBuilder builder = Ring.get(BGMBuilder.class);
protected final ClassSelector selector = Ring.get(ClassSelector.class);
protected final XSSchemaSet schemas = Ring.get(XSSchemaSet.class);
public CElement attGroupDecl(XSAttGroupDecl decl) {
return allow(decl,decl.getName());
}
public CElement attributeDecl(XSAttributeDecl decl) {
return allow(decl,decl.getName());
}
public CElement modelGroup(XSModelGroup mgroup) {
return never();
}
public CElement modelGroupDecl(XSModelGroupDecl decl) {
return never();
}
public CElement complexType(XSComplexType type) {
CElement ci = allow(type,type.getName());
if(ci!=null) return ci;
// no customization is given -- do as the default binding.
BindInfo bi = builder.getBindInfo(type);
if(type.isGlobal()) {
QName tagName = null;
String className = deriveName(type);
Locator loc = type.getLocator();
if(getGlobalBinding().isSimpleMode()) {
// in the simple mode, we may optimize it away
XSElementDecl referer = getSoleElementReferer(type);
if(referer!=null && isCollapsable(referer)) {
// if a global element contains
// a collpsable complex type, we bind this element to a named one
// and collapses element and complex type.
tagName = getName(referer);
className = deriveName(referer);
loc = referer.getLocator();
}
}
// by default, global ones get their own classes.
JPackage pkg = selector.getPackage(type.getTargetNamespace());
return new CClassInfo(model,pkg,className, loc,getTypeName(type),tagName,type,bi.toCustomizationList());
} else {
XSElementDecl element = type.getScope();
if( element.isGlobal() && isCollapsable(element)) {
if(builder.getBindInfo(element).get(BIClass.class)!=null)
// the parent element was bound to a class. Don't bind this again to
// cause unnecessary wrapping
return null;
// generate one class from element and complex type together.
// this needs to be done before selector.isBound to avoid infinite recursion.
// but avoid doing so when the element is mapped to a class,
// which creates unnecessary classes
return new CClassInfo( model, selector.getClassScope(),
deriveName(element), element.getLocator(), null,
getName(element), element, bi.toCustomizationList() );
}
CElement parentType = selector.isBound(element,type);
String className;
CClassInfoParent scope;
if( parentType!=null
&& parentType instanceof CElementInfo
&& ((CElementInfo)parentType).hasClass() ) {
// special case where we put a nested 'Type' element
scope = (CElementInfo)parentType;
className = "Type";
} else {
// since the parent element isn't bound to a type, merge the customizations associated to it, too.
// custs = CCustomizations.merge( custs, builder.getBindInfo(type.getScope()).toCustomizationList());
className = builder.getNameConverter().toClassName(element.getName());
BISchemaBinding sb = builder.getBindInfo(
type.getOwnerSchema() ).get(BISchemaBinding.class);
if(sb!=null) className = sb.mangleAnonymousTypeClassName(className);
scope = selector.getClassScope();
}
return new CClassInfo(model, scope, className, type.getLocator(), null, null, type, bi.toCustomizationList() );
}
}
private QName getTypeName(XSComplexType type) {
if(type.getRedefinedBy()!=null)
return null;
else
return getName(type);
}
/**
* Returns true if the complex type of the given element can be "optimized away"
* and unified with its parent element decl to form a single class.
*/
private boolean isCollapsable(XSElementDecl decl) {
XSType type = decl.getType();
if(!type.isComplexType())
return false; // not a complex type
if(decl.getSubstitutables().size()>1 || decl.getSubstAffiliation()!=null)
// because element substitution calls for a proper JAXBElement hierarchy
return false;
if(decl.isNillable())
// because nillable needs JAXBElement to represent correctly
return false;
BIXSubstitutable bixSubstitutable = builder.getBindInfo(decl).get(BIXSubstitutable.class);
if(bixSubstitutable !=null) {
// see https://jaxb.dev.java.net/issues/show_bug.cgi?id=289
// this customization forces non-collapsing behavior.
bixSubstitutable.markAsAcknowledged();
return false;
}
if( getGlobalBinding().isSimpleMode() && decl.isGlobal()) {
// in the simple mode, we do more aggressive optimization, and get rid of
// a complex type class if it's only used once from a global element
XSElementDecl referer = getSoleElementReferer(decl.getType());
if(referer!=null) {
assert referer==decl; // I must be the sole referer
return true;
}
}
if(!type.isLocal() || !type.isComplexType())
return false;
return true;
}
/**
* If only one global {@link XSElementDecl} is refering to {@link XSType},
* return that element, otherwise null.
*/
private @Nullable XSElementDecl getSoleElementReferer(@NotNull XSType t) {
Set referer = builder.getReferer(t);
XSElementDecl sole = null;
for (XSComponent r : referer) {
if(r instanceof XSElementDecl) {
XSElementDecl x = (XSElementDecl) r;
if(!x.isGlobal())
// local element references can be ignored, as their names are either given
// by the property, or by the JAXBElement (for things like mixed contents)
continue;
if(sole==null) sole=x;
else return null; // more than one
} else {
// if another type refers to this type, that means
// this type has a sub-type, so type substitution is possible now.
return null;
}
}
return sole;
}
public CElement elementDecl(XSElementDecl decl) {
CElement r = allow(decl,decl.getName());
if(r==null) {
QName tagName = getName(decl);
CCustomizations custs = builder.getBindInfo(decl).toCustomizationList();
if(decl.isGlobal()) {
if(isCollapsable(decl)) {
// we want the returned type to be built as a complex type,
// so the binding cannot be delayed.
return selector.bindToType(decl.getType().asComplexType(),decl,true);
} else {
String className = null;
if(getGlobalBinding().isGenerateElementClass())
className = deriveName(decl);
// otherwise map global elements to JAXBElement
CElementInfo cei = new CElementInfo(
model, tagName, selector.getClassScope(), className, custs, decl.getLocator());
selector.boundElements.put(decl,cei);
stb.refererStack.push(decl); // referer is element
cei.initContentType( selector.bindToType(decl.getType(),decl), decl, decl.getDefaultValue() );
stb.refererStack.pop();
r = cei;
}
}
}
// have the substitution member derive from the substitution head
XSElementDecl top = decl.getSubstAffiliation();
if(top!=null) {
CElement topci = selector.bindToType(top,decl);
if(r instanceof CClassInfo && topci instanceof CClassInfo)
((CClassInfo)r).setBaseClass((CClassInfo)topci);
if (r instanceof CElementInfo && topci instanceof CElementInfo)
((CElementInfo)r).setSubstitutionHead((CElementInfo)topci);
}
return r;
}
public CClassInfo empty( XSContentType ct ) { return null; }
public CClassInfo identityConstraint(XSIdentityConstraint xsIdentityConstraint) {
return never();
}
public CClassInfo xpath(XSXPath xsxPath) {
return never();
}
public CClassInfo attributeUse(XSAttributeUse use) {
return never();
}
public CElement simpleType(XSSimpleType type) {
CElement c = allow(type,type.getName());
if(c!=null) return c;
if(getGlobalBinding().isSimpleTypeSubstitution() && type.isGlobal()) {
return new CClassInfo(model,selector.getClassScope(),
deriveName(type), type.getLocator(), getName(type), null, type, null );
}
return never();
}
public CClassInfo particle(XSParticle particle) {
return never();
}
public CClassInfo wildcard(XSWildcard wc) {
return never();
}
// these methods won't be used
public CClassInfo annotation(XSAnnotation annon) {
assert false;
return null;
}
public CClassInfo notation(XSNotation not) {
assert false;
return null;
}
public CClassInfo facet(XSFacet decl) {
assert false;
return null;
}
public CClassInfo schema(XSSchema schema) {
assert false;
return null;
}
/**
* Makes sure that the component doesn't carry a {@link BIClass}
* customization.
*
* @return
* return value is unused. Since most of the caller needs to
* return null, to make the code a little bit shorter, this
* method always return null (so that the caller can always
* say return never(sc);.
*/
private CClassInfo never() {
// all we need to do here is just not to acknowledge
// any class customization. Then this class customization
// will be reported as an error later when we check all
// unacknowledged customizations.
// BIDeclaration cust=owner.getBindInfo(component).get(BIClass.NAME);
// if(cust!=null) {
// // error
// owner.errorReporter.error(
// cust.getLocation(),
// "test {0}", NameGetter.get(component) );
// }
return null;
}
/**
* Checks if a component carries a customization to map it to a class.
* If so, make it a class.
*
* @param defaultBaseName
* The token which will be used as the basis of the class name
* if the class name is not specified in the customization.
* This is usually the name of an element declaration, and so on.
*
* This parameter can be null, in that case it would be an error
* if a name is not given by the customization.
*/
private CElement allow( XSComponent component, String defaultBaseName ) {
BIClass decl = null;
if(component instanceof XSComplexType) {
XSType complexType = (XSType)component;
BIClass lastFoundRecursiveBiClass = null;
if(complexType.getName() != null) {
while( ! schemas.getAnyType().equals(complexType)) {
BindInfo bindInfo = builder.getBindInfo(complexType);
BIClass biClass = bindInfo.get(BIClass.class);
if(biClass != null && "true".equals(biClass.getRecursive()))
lastFoundRecursiveBiClass = biClass;
complexType = complexType.getBaseType();
}
}
// use this as biclass for current component
decl = lastFoundRecursiveBiClass;
}
BindInfo bindInfo = builder.getBindInfo(component);
if(decl == null) {
decl = bindInfo.get(BIClass.class);
if(decl==null) return null;
}
decl.markAsAcknowledged();
// first consider binding to the class reference.
String ref = decl.getExistingClassRef();
if(ref!=null) {
if(!JJavaName.isFullyQualifiedClassName(ref)) {
Ring.get(ErrorReceiver.class).error( decl.getLocation(),
Messages.format(Messages.ERR_INCORRECT_CLASS_NAME,ref) );
// recover by ignoring @ref
} else {
if(component instanceof XSComplexType) {
// UGLY UGLY UGLY
// since we are not going to bind this complex type, we need to figure out
// its binding mode without actually binding it (and also expose this otherwise
// hidden mechanism into this part of the code.)
//
// this code is potentially dangerous as the base class might have been bound
// in different ways. To be correct, we need to figure out how the content type
// would have been bound, from the schema.
Ring.get(ComplexTypeFieldBuilder.class).recordBindingMode(
(XSComplexType)component, ComplexTypeBindingMode.NORMAL
);
}
return new CClassRef(model, component, decl, bindInfo.toCustomizationList() );
}
}
String clsName = decl.getClassName();
if(clsName==null) {
// if the customiztion doesn't give us a name, derive one
// from the current component.
if( defaultBaseName==null ) {
Ring.get(ErrorReceiver.class).error( decl.getLocation(),
Messages.format(Messages.ERR_CLASS_NAME_IS_REQUIRED) );
// recover by generating a pseudo-random name
defaultBaseName = "undefined"+component.hashCode();
}
clsName = builder.deriveName( defaultBaseName, component );
} else {
if( !JJavaName.isJavaIdentifier(clsName) ) {
// not a valid Java class name
Ring.get(ErrorReceiver.class).error( decl.getLocation(),
Messages.format( Messages.ERR_INCORRECT_CLASS_NAME, clsName ));
// recover by a dummy name
clsName = "Undefined"+component.hashCode();
}
}
QName typeName = null;
QName elementName = null;
if(component instanceof XSType) {
XSType t = (XSType) component;
typeName = getName(t);
}
if (component instanceof XSElementDecl) {
XSElementDecl e = (XSElementDecl) component;
elementName = getName(e);
}
if (component instanceof XSElementDecl && !isCollapsable((XSElementDecl)component)) {
XSElementDecl e = ((XSElementDecl)component);
CElementInfo cei = new CElementInfo(model, elementName,
selector.getClassScope(), clsName,
bindInfo.toCustomizationList(), decl.getLocation() );
selector.boundElements.put(e,cei);
stb.refererStack.push(component); // referer is element
cei.initContentType(
selector.bindToType(e.getType(),e),
e,e.getDefaultValue());
stb.refererStack.pop();
return cei;
// TODO: support javadoc and userSpecifiedImplClass
} else {
CClassInfo bt = new CClassInfo(model,selector.getClassScope(),
clsName, decl.getLocation(), typeName, elementName, component, bindInfo.toCustomizationList() );
// set javadoc class comment.
if(decl.getJavadoc()!=null )
bt.javadoc = decl.getJavadoc()+"\n\n";
// add extra blank lines so that the schema fragment
// and user-specified javadoc would be separated
// if the implClass is given, set it to ClassItem
String implClass = decl.getUserSpecifiedImplClass();
if( implClass!=null )
bt.setUserSpecifiedImplClass( implClass );
return bt;
}
}
private BIGlobalBinding getGlobalBinding() {
return builder.getGlobalBinding();
}
/**
* Derives a name from a schema component.
* Use the name of the schema component as the default name.
*/
private String deriveName( XSDeclaration comp ) {
return builder.deriveName( comp.getName(), comp );
}
/**
* Derives a name from a schema component.
* For complex types, we take redefinition into account when
* deriving a default name.
*/
private String deriveName( XSComplexType comp ) {
String seed = builder.deriveName( comp.getName(), comp );
int cnt = comp.getRedefinedCount();
for( ; cnt>0; cnt-- )
seed = "Original"+seed;
return seed;
}
}
