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package serp.bytecode;
import java.io.*;
import java.lang.reflect.*;
import java.util.*;
import serp.bytecode.lowlevel.*;
import serp.bytecode.visitor.*;
import serp.util.*;
/**
* A declared annotation.
*
* @author Abe White
*/
public class Annotation implements BCEntity, VisitAcceptor {
private static Method ENUM_VALUEOF = null;
private static Method ENUM_NAME = null;
static {
try {
Class c = Class.forName("java.lang.Enum");
ENUM_VALUEOF = c.getMethod("valueOf", new Class[] {
Class.class, String.class });
ENUM_NAME = c.getMethod("name", (Class[]) null);
} catch (Throwable t) {
// pre-1.5 JDK
}
}
private BCEntity _owner = null;
private int _typeIndex = 0;
private List _properties = null;
Annotation(BCEntity owner) {
_owner = owner;
}
/**
* Annotations are stored in an {@link Annotations} table or as
* part of an {@link Annotation} property value.
*/
public BCEntity getOwner() {
return _owner;
}
void invalidate() {
_owner = null;
}
/**
* The index in the class {@link ConstantPool} of the
* {@link UTF8Entry} holding the type of this annotation.
*/
public int getTypeIndex() {
return _typeIndex;
}
/**
* The index in the class {@link ConstantPool} of the
* {@link UTF8Entry} holding the type of this annotation.
*/
public void setTypeIndex(int index) {
_typeIndex = index;
}
/**
* The name of this annotation's type.
*/
public String getTypeName() {
String desc = ((UTF8Entry) getPool().getEntry(_typeIndex)).getValue();
return getProject().getNameCache().getExternalForm(desc, false);
}
/**
* The {@link Class} object for this annotation's type.
*/
public Class getType() {
return Strings.toClass(getTypeName(), getClassLoader());
}
/**
* The bytecode for the type of this annotation.
*/
public BCClass getTypeBC() {
return getProject().loadClass(getTypeName(), getClassLoader());
}
/**
* This annotation's type.
*/
public void setType(String type) {
type = getProject().getNameCache().getInternalForm(type, true);
_typeIndex = getPool().findUTF8Entry(type, true);
}
/**
* This annotation's type.
*/
public void setType(Class type) {
setType(type.getName());
}
/**
* This annotation's type.
*/
public void setType(BCClass type) {
setType(type.getName());
}
/**
* All declared properties.
*/
public Property[] getProperties() {
if (_properties == null)
return new Property[0];
return (Property[]) _properties.toArray
(new Property[_properties.size()]);
}
/**
* Set the annotation properties. This method is useful when
* importing properties from another instance.
*/
public void setProperties(Property[] props) {
clearProperties();
if (props != null)
for (int i = 0; i < props.length; i++)
addProperty(props[i]);
}
/**
* Return the property with the given name, or null if none.
*/
public Property getProperty(String name) {
if (_properties == null)
return null;
Property prop;
for (int i = 0; i < _properties.size(); i++) {
prop = (Property) _properties.get(i);
if (prop.getName().equals(name))
return prop;
}
return null;
}
/**
* Import a property from another instance.
*
* @return the newly added property
*/
public Property addProperty(Property p) {
Property prop = addProperty(p.getName());
prop.setValue(p.getValue());
return prop;
}
/**
* Add a new property.
*/
public Property addProperty(String name) {
Property prop = new Property(this);
prop.setName(name);
if (_properties == null)
_properties = new ArrayList();
_properties.add(prop);
return prop;
}
/**
* Clear all annotation properties.
*/
public void clearProperties() {
if (_properties == null)
return;
for (int i = 0; i < _properties.size(); i++)
((Property) _properties.get(i)).invalidate();
_properties.clear();
}
/**
* Remove the given property.
*
* @return true if an property was removed, false otherwise
*/
public boolean removeProperty(Property prop) {
return prop != null && removeProperty(prop.getName());
}
/**
* Remove the property with the given name.
*
* @return true if a property was removed, false otherwise
*/
public boolean removeProperty(String name) {
if (name == null || _properties == null)
return false;
Property prop;
for (int i = 0; i < _properties.size(); i++) {
prop = (Property) _properties.get(i);
if (prop.getName().equals(name)) {
prop.invalidate();
_properties.remove(i);
return true;
}
}
return false;
}
public Project getProject() {
return _owner.getProject();
}
public ConstantPool getPool() {
return _owner.getPool();
}
public ClassLoader getClassLoader() {
return _owner.getClassLoader();
}
public boolean isValid() {
return _owner != null;
}
public void acceptVisit(BCVisitor visit) {
visit.enterAnnotation(this);
if (_properties != null)
for (int i = 0; i < _properties.size(); i++)
((Property) _properties.get(i)).acceptVisit(visit);
visit.exitAnnotation(this);
}
int getLength() {
int len = 4;
if (_properties != null)
for (int i = 0; i < _properties.size(); i++)
len += ((Property) _properties.get(i)).getLength();
return len;
}
void read(DataInput in) throws IOException {
_typeIndex = in.readUnsignedShort();
clearProperties();
int props = in.readUnsignedShort();
if (props > 0) {
if (_properties == null)
_properties = new ArrayList(props);
Property prop;
for (int i = 0; i < props; i++) {
prop = new Property(this);
prop.read(in);
_properties.add(prop);
}
}
}
void write(DataOutput out) throws IOException {
out.writeShort(_typeIndex);
out.writeShort((_properties == null) ? 0 : _properties.size());
if (_properties != null) {
for (int i = 0; i < _properties.size(); i++)
((Property) _properties.get(i)).write(out);
}
}
/**
* An annotation property.
*/
public static class Property implements BCEntity, VisitAcceptor {
private Annotation _owner = null;
private int _nameIndex = 0;
private final Value _value = new Value();
private Value[] _values = null;
Property(Annotation owner) {
_owner = owner;
}
/**
* The owning annotation.
*/
public Annotation getAnnotation() {
return _owner;
}
void invalidate() {
_owner = null;
}
/**
* Return the index in the class {@link ConstantPool} of the
* {@link UTF8Entry} holding the name of this property.
*/
public int getNameIndex() {
return _nameIndex;
}
/**
* Set the index in the class {@link ConstantPool} of the
* {@link UTF8Entry} holding the name of this property.
*/
public void setNameIndex(int index) {
_nameIndex = index;
}
/**
* Return the name of this property.
*/
public String getName() {
return ((UTF8Entry) getPool().getEntry(_nameIndex)).getValue();
}
/**
* Set the name of this property.
*/
public void setName(String name) {
_nameIndex = getPool().findUTF8Entry(name, true);
}
/**
* Return the value of the property as its wrapper type.
* Returns class values as the class name.
*/
public Object getValue() {
if (_values == null)
return getValue(_value);
Object[] vals = new Object[_values.length];
for (int i = 0; i < vals.length; i++)
vals[i] = getValue(_values[i]);
return vals;
}
/**
* Extract the Java value.
*/
private Object getValue(Value val) {
if (val.index == -1)
return val.value;
Object o = ((ConstantEntry) getPool().getEntry(val.index)).
getConstant();
if (val.index2 != -1) {
// enum value
String e = getProject().getNameCache().
getExternalForm((String) o, false);
String name = ((UTF8Entry) getPool().getEntry(val.index2)).
getValue();
try {
Class cls = Class.forName(e, true, getClassLoader());
return ENUM_VALUEOF.invoke(null, new Object[] {cls, name});
} catch (Throwable t) {
return e + "." + name;
}
}
if (val.type == null)
return o;
switch (val.type.getName().charAt(0)) {
case 'b':
if (val.type == boolean.class)
return (((Number) o).intValue() != 0) ? Boolean.TRUE
: Boolean.FALSE;
return new Byte(((Number) o).byteValue());
case 'c':
return new Character((char) ((Number) o).intValue());
case 'j': // java.lang.Class
return getProject().getNameCache().getExternalForm((String) o,
false);
case 's':
return new Short(((Number) o).shortValue());
default:
return o;
}
}
/**
* Set value of this property. The value should be an instance of any
* primitive wrapper type, String, Class, BCClass, an enum constant,
* an annotation, or an array of any of these types.
*/
public void setValue(Object value) {
if (!value.getClass().isArray()) {
_values = null;
setValue(_value, value);
} else {
_value.value = null;
_values = new Value[Array.getLength(value)];
for (int i = 0; i < _values.length; i++) {
_values[i] = new Value();
setValue(_values[i], Array.get(value, i));
}
}
}
/**
* Set the given value.
*/
private void setValue(Value val, Object o) {
if (o instanceof String)
setValue(val, (String) o);
else if (o instanceof Boolean)
setValue(val, ((Boolean) o).booleanValue());
else if (o instanceof Byte)
setValue(val, ((Byte) o).byteValue());
else if (o instanceof Character)
setValue(val, ((Character) o).charValue());
else if (o instanceof Double)
setValue(val, ((Double) o).doubleValue());
else if (o instanceof Float)
setValue(val, ((Float) o).floatValue());
else if (o instanceof Integer)
setValue(val, ((Integer) o).intValue());
else if (o instanceof Long)
setValue(val, ((Long) o).longValue());
else if (o instanceof Short)
setValue(val, ((Short) o).shortValue());
else if (o instanceof Class)
setClassNameValue(val, ((Class) o).getName());
else if (o instanceof BCClass)
setClassNameValue(val, ((BCClass) o).getName());
else if (o instanceof Annotation)
setValue(val, (Annotation) o);
else {
String name = getEnumName(o);
if (name != null) {
String type = getProject().getNameCache().
getInternalForm(o.getClass().getName(), true);
val.index = getPool().findUTF8Entry(type, true);
val.index2 = getPool().findUTF8Entry(name, true);
val.value = null;
val.type = null;
} else {
val.index = -1;
val.index2 = -1;
val.value = o;
val.type = o.getClass();
}
}
}
/**
* Return the name of this enum value, or null if not an enum.
*/
private static String getEnumName(Object o) {
for (Class c = o.getClass(); true; c = c.getSuperclass()) {
if (c == Object.class || c == null)
return null;
if ("java.lang.Enum".equals(c.getName()))
break;
}
try {
return (String) ENUM_NAME.invoke(o, (Object[]) null);
} catch (Throwable t) {
return o.toString();
}
}
/**
* Return the string value of this property, or null if not set.
*/
public String getStringValue() {
return (String) getValue();
}
/**
* Return the boolean value of this property, or false if not set.
*/
public boolean getBooleanValue() {
Object value = getValue();
return (value == null) ? false : ((Boolean) value).booleanValue();
}
/**
* Return the byte value of this property, or false if not set.
*/
public byte getByteValue() {
Object value = getValue();
return (value == null) ? (byte) 0 : ((Number) value).byteValue();
}
/**
* Return the int value of this property, or 0 if not set.
*/
public int getIntValue() {
Object value = getValue();
return (value == null) ? 0 : ((Number) value).intValue();
}
/**
* Return the long value of this property, or 0 if not set.
*/
public long getLongValue() {
Object value = getValue();
return (value == null) ? 0L : ((Number) value).longValue();
}
/**
* Return the float value of this property, or 0 if not set.
*/
public float getFloatValue() {
Object value = getValue();
return (value == null) ? 0F : ((Number) value).floatValue();
}
/**
* Return the double value of this property, or 0 if not set.
*/
public double getDoubleValue() {
Object value = getValue();
return (value == null) ? 0D : ((Number) value).doubleValue();
}
/**
* Return the short value of this property, or 0 if not set.
*/
public short getShortValue() {
Object value = getValue();
return (value == null) ? (short) 0 : ((Number) value).shortValue();
}
/**
* Return the class value of this property, or null if not set.
*/
public String getClassNameValue() {
return (String) getValue();
}
/**
* Return the annotation value of this property, or null if not set.
*/
public Annotation getAnnotationValue() {
return (Annotation) getValue();
}
/**
* Set the string value of this property.
*/
public void setValue(String value) {
_values = null;
setValue(_value, value);
}
/**
* Set the string value of this property.
*/
private void setValue(Value val, String o) {
val.index = getPool().findUTF8Entry(o, true);
val.index2 = -1;
val.value = null;
val.type = null;
}
/**
* Set the boolean value of this property.
*/
public void setValue(boolean value) {
_values = null;
setValue(_value, value);
}
/**
* Set the boolean value of this property.
*/
private void setValue(Value val, boolean o) {
setValue(val, (o) ? 1 : 0);
val.type = boolean.class;
}
/**
* Set the byte value of this property.
*/
public void setValue(byte value) {
_values = null;
setValue(_value, value);
}
/**
* Set the byte value of this property.
*/
private void setValue(Value val, byte o) {
setValue(val, (int) o);
val.type = byte.class;
}
/**
* Set the int value of this property.
*/
public void setValue(int value) {
_values = null;
setValue(_value, value);
}
/**
* Set the int value of this property.
*/
private void setValue(Value val, int o) {
val.index = getPool().findIntEntry(o, true);
val.index2 = -1;
val.value = null;
val.type = null;
}
/**
* Set the long value of this property.
*/
public void setValue(long value) {
_values = null;
setValue(_value, value);
}
/**
* Set the long value of this property.
*/
private void setValue(Value val, long o) {
val.index = getPool().findLongEntry(o, true);
val.index2 = -1;
val.value = null;
val.type = null;
}
/**
* Set the float value of this property.
*/
public void setValue(float value) {
_values = null;
setValue(_value, value);
}
/**
* Set the float value of this property.
*/
private void setValue(Value val, float o) {
val.index = getPool().findFloatEntry(o, true);
val.index2 = -1;
val.value = null;
val.type = null;
}
/**
* Set the double value of this property.
*/
public void setValue(double value) {
_values = null;
setValue(_value, value);
}
/**
* Set the double value of this property.
*/
private void setValue(Value val, double o) {
val.index = getPool().findDoubleEntry(o, true);
val.index2 = -1;
val.value = null;
val.type = null;
}
/**
* Set the short value of this property.
*/
public void setValue(short value) {
_values = null;
setValue(_value, value);
}
/**
* Set the short value of this property.
*/
private void setValue(Value val, short o) {
setValue(val, (int) o);
val.type = short.class;
}
/**
* Set the class value of this property.
*/
public void setValue(Class value) {
setClassNameValue(value.getName());
}
/**
* Set the class value of this property.
*/
public void setValue(BCClass value) {
setClassNameValue(value.getName());
}
/**
* Set the class value of this property.
*/
public void setClassNameValue(String value) {
_values = null;
setClassNameValue(_value, value);
}
/**
* Set the class value of this property.
*/
private void setClassNameValue(Value val, String o) {
o = getProject().getNameCache().getInternalForm(o, true);
val.index = getPool().findUTF8Entry(o, true);
val.index2 = -1;
val.value = null;
val.type = Class.class;
}
/**
* Set the annotation value of this property by importing the given
* annotation from another instance.
*/
public Annotation setValue(Annotation value) {
_values = null;
return setValue(_value, value);
}
/**
* Set the annotation value of this property by importing the given
* annotation from another instance.
*/
private Annotation setValue(Value val, Annotation o) {
Annotation anno = new Annotation(this);
anno.setType(o.getTypeName());
anno.setProperties(o.getProperties());
val.index = -1;
val.index2 = -1;
val.value = anno;
val.type = null;
return anno;
}
/**
* Set the annotation value of this property by importing the given
* annotation from another instance.
*/
public Annotation[] setValue(Annotation[] value) {
_value.value = null;
_values = new Value[value.length];
Annotation[] ret = new Annotation[value.length];
for (int i = 0; i < _values.length; i++) {
_values[i] = new Value();
ret[i] = setValue(_values[i], value[i]);
}
return ret;
}
/**
* Set this property value to a new annotation of the given type,
* returning the annotation for manipulation.
*/
public Annotation newAnnotationValue(Class type) {
return newAnnotationValue(type.getName());
}
/**
* Set this property value to a new annotation of the given type,
* returning the annotation for manipulation.
*/
public Annotation newAnnotationValue(BCClass type) {
return newAnnotationValue(type.getName());
}
/**
* Set this property value to a new annotation of the given type,
* returning the annotation for manipulation.
*/
public Annotation newAnnotationValue(String type) {
Annotation anno = new Annotation(this);
anno.setType(type);
_values = null;
_value.index = -1;
_value.index2 = -1;
_value.value = anno;
_value.type = null;
return anno;
}
/**
* Set this property value to a new annotation array of the given type
* and length, returning the annotations for manipulation.
*/
public Annotation[] newAnnotationArrayValue(Class type, int length) {
return newAnnotationArrayValue(type.getName(), length);
}
/**
* Set this property value to a new annotation array of the given type
* and length, returning the annotations for manipulation.
*/
public Annotation[] newAnnotationArrayValue(BCClass type, int length) {
return newAnnotationArrayValue(type.getName(), length);
}
/**
* Set this property value to a new annotation array of the given type
* and length, returning the annotations for manipulation.
*/
public Annotation[] newAnnotationArrayValue(String type, int length) {
_value.value = null;
_values = new Value[length];
Annotation[] ret = new Annotation[length];
for (int i = 0; i < length; i++) {
ret[i] = new Annotation(this);
ret[i].setType(type);
_values[i] = new Value();
_values[i].index = -1;
_values[i].index2 = -1;
_values[i].value = ret[i];
_values[i].type = null;
}
return ret;
}
public Project getProject() {
return _owner.getProject();
}
public ConstantPool getPool() {
return _owner.getPool();
}
public ClassLoader getClassLoader() {
return _owner.getClassLoader();
}
public boolean isValid() {
return _owner != null && (_values != null || _value.index != -1
|| _value.value != null);
}
public void acceptVisit(BCVisitor visit) {
visit.enterAnnotationProperty(this);
visit.exitAnnotationProperty(this);
}
int getLength() {
if (!isValid())
throw new IllegalStateException();
int len = 2; // name
if (_values == null)
len += getLength(_value);
else {
len += 3; // arr length + tag
for (int i = 0; i < _values.length; i++)
len += getLength(_values[i]);
}
return len;
}
/**
* Return the length of the given value.
*/
private int getLength(Value val) {
if (val.index2 != -1)
return 5; // tag + enum type + enum name
if (val.index != -1)
return 3; // tag + constant or class
return 1 + ((Annotation) val.value).getLength(); // tag + anno
}
void read(DataInput in) throws IOException {
_nameIndex = in.readUnsignedShort();
int tag = in.readByte();
if (tag == '[') {
int len = in.readUnsignedShort();
_values = new Value[len];
for (int i = 0; i < len; i++) {
_values[i] = new Value();
read(_values[i], in.readByte(), in);
}
} else
read(_value, tag, in);
}
/**
* Read data into the given value.
*/
private void read(Value val, int tag, DataInput in) throws IOException {
switch (tag) {
case 'B':
val.index = in.readUnsignedShort();
val.index2 = -1;
val.value = null;
val.type = byte.class;
break;
case 'C':
val.index = in.readUnsignedShort();
val.index2 = -1;
val.value = null;
val.type = char.class;
break;
case 'D':
case 'F':
case 'I':
case 'J':
case 'S':
case 's':
val.index = in.readUnsignedShort();
val.index2 = -1;
val.value = null;
val.type = null;
break;
case 'Z':
val.index = in.readUnsignedShort();
val.index2 = -1;
val.value = null;
val.type = boolean.class;
break;
case 'c':
val.index = in.readUnsignedShort();
val.index2 = -1;
val.value = null;
val.type = Class.class;
break;
case 'e':
val.index = in.readUnsignedShort();
val.index2 = in.readUnsignedShort();
val.value = null;
val.type = null;
break;
case '@':
Annotation anno = new Annotation(this);
anno.read(in);
val.index = -1;
val.index2 = -1;
val.value = anno;
val.type = null;
break;
default:
throw new IllegalStateException(String.valueOf(tag));
}
}
void write(DataOutput out) throws IOException {
if (!isValid())
throw new IllegalStateException();
out.writeShort(_nameIndex);
if (_values == null)
write(_value, out);
else {
out.writeByte('[');
out.writeShort(_values.length);
for (int i = 0; i < _values.length; i++)
write(_values[i], out);
}
}
/**
* Write the data for the given value to the stream.
*/
private void write(Value val, DataOutput out) throws IOException {
if (val.index2 != -1) {
out.writeByte('e');
out.writeShort(val.index);
out.writeShort(val.index2);
} else if (val.index != -1) {
if (val.type != null) {
switch (val.type.getName().charAt(0)) {
case 'b':
if (val.type == byte.class)
out.writeByte('B');
else
out.writeByte('Z');
break;
case 'c':
out.writeByte('C');
break;
case 'j': // java.lang.Class
out.writeByte('c');
break;
case 's':
out.writeByte('S');
break;
default:
throw new IllegalStateException(val.type.getName());
}
} else {
Entry entry = getPool().getEntry(val.index);
if (entry instanceof DoubleEntry)
out.writeByte('D');
else if (entry instanceof FloatEntry)
out.writeByte('F');
else if (entry instanceof IntEntry)
out.writeByte('I');
else if (entry instanceof LongEntry)
out.writeByte('J');
else if (entry instanceof UTF8Entry)
out.writeByte('s');
else
throw new IllegalStateException(entry.getClass().
getName());
}
out.writeShort(val.index);
} else {
out.writeByte('@');
((Annotation) val.value).write(out);
}
}
/**
* Property value struct.
*/
private static class Value {
public int index = -1;
public int index2 = -1;
public Class type = null;
public Object value = null;
}
}
}
