com.sun.tools.oldlets.javadoc.main.SerializedForm Maven / Gradle / Ivy
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* accompanied this code).
*
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package com.sun.tools.oldlets.javadoc.main;
import com.sun.javadoc.SerialFieldTag;
import com.sun.javadoc.Tag;
import com.sun.javadoc.MethodDoc;
import com.sun.javadoc.FieldDoc;
import com.sun.tools.javac.code.*;
import com.sun.tools.javac.code.Symbol.ClassSymbol;
import com.sun.tools.javac.code.Symbol.MethodSymbol;
import com.sun.tools.javac.code.Symbol.VarSymbol;
import com.sun.tools.javac.util.*;
/**
* The serialized form is the specification of a class' serialization
* state.
*
* It consists of the following information:
*
*
* 1. Whether class is Serializable or Externalizable.
* 2. Javadoc for serialization methods.
* a. For Serializable, the optional readObject, writeObject,
* readResolve and writeReplace.
* serialData tag describes, in prose, the sequence and type
* of optional data written by writeObject.
* b. For Externalizable, writeExternal and readExternal.
* serialData tag describes, in prose, the sequence and type
* of optional data written by writeExternal.
* 3. Javadoc for serialization data layout.
* a. For Serializable, the name,type and description
* of each Serializable fields.
* b. For Externalizable, data layout is described by 2(b).
*
*
* This is NOT part of any supported API.
* If you write code that depends on this, you do so at your own risk.
* This code and its internal interfaces are subject to change or
* deletion without notice.
*
* @since 1.2
* @author Joe Fialli
* @author Neal Gafter (rewrite but not too proud)
*/
class SerializedForm {
ListBuffer methods = new ListBuffer<>();
/* List of FieldDocImpl - Serializable fields.
* Singleton list if class defines Serializable fields explicitly.
* Otherwise, list of default serializable fields.
* 0 length list for Externalizable.
*/
private final ListBuffer fields = new ListBuffer<>();
/* True if class specifies serializable fields explicitly.
* using special static member, serialPersistentFields.
*/
private boolean definesSerializableFields = false;
// Specially treated field/method names defined by Serialization.
private static final String SERIALIZABLE_FIELDS = "serialPersistentFields";
private static final String READOBJECT = "readObject";
private static final String WRITEOBJECT = "writeObject";
private static final String READRESOLVE = "readResolve";
private static final String WRITEREPLACE = "writeReplace";
private static final String READOBJECTNODATA = "readObjectNoData";
/**
* Constructor.
*
* Catalog Serializable fields for Serializable class.
* Catalog serialization methods for Serializable and
* Externalizable classes.
*/
SerializedForm(DocEnv env, ClassSymbol def, ClassDocImpl cd) {
if (cd.isExternalizable()) {
/* look up required public accessible methods,
* writeExternal and readExternal.
*/
String[] readExternalParamArr = { "java.io.ObjectInput" };
String[] writeExternalParamArr = { "java.io.ObjectOutput" };
MethodDoc md = cd.findMethod("readExternal", readExternalParamArr);
if (md != null) {
methods.append(md);
}
md = cd.findMethod("writeExternal", writeExternalParamArr);
if (md != null) {
methods.append(md);
Tag tag[] = md.tags("serialData");
}
// } else { // isSerializable() //### ???
} else if (cd.isSerializable()) {
VarSymbol dsf = getDefinedSerializableFields(def);
if (dsf != null) {
/* Define serializable fields with array of ObjectStreamField.
* Each ObjectStreamField should be documented by a
* serialField tag.
*/
definesSerializableFields = true;
//### No modifier filtering applied here.
FieldDocImpl dsfDoc = env.getFieldDoc(dsf);
fields.append(dsfDoc);
mapSerialFieldTagImplsToFieldDocImpls(dsfDoc, env, def);
} else {
/* Calculate default Serializable fields as all
* non-transient, non-static fields.
* Fields should be documented by serial tag.
*/
computeDefaultSerializableFields(env, def, cd);
}
/* Check for optional customized readObject, writeObject,
* readResolve and writeReplace, which can all contain
* the serialData tag. */
addMethodIfExist(env, def, READOBJECT);
addMethodIfExist(env, def, WRITEOBJECT);
addMethodIfExist(env, def, READRESOLVE);
addMethodIfExist(env, def, WRITEREPLACE);
addMethodIfExist(env, def, READOBJECTNODATA);
}
}
/*
* Check for explicit Serializable fields.
* Check for a private static array of ObjectStreamField with
* name SERIALIZABLE_FIELDS.
*/
private VarSymbol getDefinedSerializableFields(ClassSymbol def) {
Names names = def.name.table.names;
/* SERIALIZABLE_FIELDS can be private,
* so must lookup by ClassSymbol, not by ClassDocImpl.
*/
Scope members = SymbolKind.invokeOrNull(def, "members");
for (Symbol sym : SymbolKind.getSymbolsByName(members, true, names.fromString(SERIALIZABLE_FIELDS))) {
if (SymbolKind.VAR.same(sym)) {
VarSymbol f = (VarSymbol)sym;
if ((f.flags() & Flags.STATIC) != 0 &&
(f.flags() & Flags.PRIVATE) != 0) {
return f;
}
}
}
return null;
}
/*
* Compute default Serializable fields from all members of ClassSymbol.
*
* Since the fields of ClassDocImpl might not contain private or
* package accessible fields, must walk over all members of ClassSymbol.
*/
private void computeDefaultSerializableFields(DocEnv env,
ClassSymbol def,
ClassDocImpl cd) {
Scope members = SymbolKind.invokeOrNull(def, "members");
for (Symbol sym : SymbolKind.getSymbols(members, false)) {
if (sym != null && SymbolKind.VAR.same(sym)) {
VarSymbol f = (VarSymbol)sym;
if ((f.flags() & Flags.STATIC) == 0 &&
(f.flags() & Flags.TRANSIENT) == 0) {
//### No modifier filtering applied here.
FieldDocImpl fd = env.getFieldDoc(f);
//### Add to beginning.
//### Preserve order used by old 'javadoc'.
fields.prepend(fd);
}
}
}
}
/*
* Catalog Serializable method if it exists in current ClassSymbol.
* Do not look for method in superclasses.
*
* Serialization requires these methods to be non-static.
*
* @param method should be an unqualified Serializable method
* name either READOBJECT, WRITEOBJECT, READRESOLVE
* or WRITEREPLACE.
* @param visibility the visibility flag for the given method.
*/
private void addMethodIfExist(DocEnv env, ClassSymbol def, String methodName) {
Names names = def.name.table.names;
Scope members = SymbolKind.invokeOrNull(def, "members");
for (Symbol sym : SymbolKind.getSymbolsByName(members, true, names.fromString(methodName))) {
if (SymbolKind.MTH.same(sym)) {
MethodSymbol md = (MethodSymbol)sym;
if ((md.flags() & Flags.STATIC) == 0) {
/*
* WARNING: not robust if unqualifiedMethodName is overloaded
* method. Signature checking could make more robust.
* READOBJECT takes a single parameter, java.io.ObjectInputStream.
* WRITEOBJECT takes a single parameter, java.io.ObjectOutputStream.
*/
methods.append(env.getMethodDoc(md));
}
}
}
}
/*
* Associate serialField tag fieldName with FieldDocImpl member.
* Note: A serialField tag does not have to map an existing field
* of a class.
*/
private void mapSerialFieldTagImplsToFieldDocImpls(FieldDocImpl spfDoc,
DocEnv env,
ClassSymbol def) {
Names names = def.name.table.names;
for (SerialFieldTag tag : spfDoc.serialFieldTags()) {
if (tag.fieldName() == null || tag.fieldType() == null) // ignore malformed @serialField tags
continue;
Name fieldName = names.fromString(tag.fieldName());
// Look for a FieldDocImpl that is documented by serialFieldTagImpl.
Scope members = SymbolKind.invokeOrNull(def, "members");
for (Symbol sym : SymbolKind.getSymbolsByName(members, true, fieldName)) {
if (SymbolKind.VAR.same(sym)) {
VarSymbol f = (VarSymbol) sym;
FieldDocImpl fdi = env.getFieldDoc(f);
((SerialFieldTagImpl) (tag)).mapToFieldDocImpl(fdi);
break;
}
}
}
}
/**
* Return serializable fields in class.
*
* Returns either a list of default fields documented by serial tag comment or
* javadoc comment
* Or Returns a single FieldDocImpl for serialPersistentField. There is a
* serialField tag for each serializable field.
*
* @return an array of FieldDocImpl for representing the visible
* fields in this class.
*/
FieldDoc[] fields() {
return (FieldDoc[])fields.toArray(new FieldDocImpl[fields.length()]);
}
/**
* Return serialization methods in class.
*
* @return an array of MethodDocImpl for serialization methods in this class.
*/
MethodDoc[] methods() {
return methods.toArray(new MethodDoc[methods.length()]);
}
/**
* Returns true if Serializable fields are defined explicitly using
* member, serialPersistentFields.
*
* @see #fields()
*/
boolean definesSerializableFields() {
return definesSerializableFields;
}
}