gcc/libjava/java/lang/reflect/Field.java
Tom Tromey ee9dd3721b Initial revision
From-SVN: r26263
1999-04-07 14:42:40 +00:00

265 lines
7.8 KiB
Java

/* Copyright (C) 1998, 1999 Cygnus Solutions
This file is part of libgcj.
This software is copyrighted work licensed under the terms of the
Libgcj License. Please consult the file "LIBGCJ_LICENSE" for
details. */
package java.lang.reflect;
/**
* @author Per Bothner <bothner@cygnus.com>
* @date September 1998; February 1999.
*/
/* Status: Mostly implemented.
* However, access checks are not implemented. See natField.cc for
* _Jv_CheckFieldAccessibility as well as the missing getCaller.
* Note that the idea is to have to compiler convert calls to
* setXXX(...) and getXXX(...) to setXXX(CALLER, ...) and getXXX(CALLER, ...),
* where CALLER is reference to the class that contains the calls to
* setXXX or getXXX. This is easy for the compiler, and replaces
* expensive stack and table searching with a constant.
*/
public final class Field extends AccessibleObject implements Member
{
private Class declaringClass;
// This is filled in by getName.
private String name;
// Offset in bytes from the start of declaringClass's fields array.
private int offset;
public boolean equals (Object fld)
{
if (! (fld instanceof Field))
return false;
Field f = (Field) fld;
return declaringClass == f.declaringClass && offset == f.offset;
}
public Class getDeclaringClass ()
{
return declaringClass;
}
public native String getName ();
public native Class getType ();
public native int getModifiers ();
public int hashCode()
{
return (declaringClass.hashCode() ^ offset);
}
// The idea is that the compiler will magically translate
// fld.getShort(obj) to fld.getShort(THISCLASS, obj).
// This makes checking assessiblity more efficient,
// since we don't have to do any stack-walking.
public boolean getBoolean (Object obj)
throws IllegalArgumentException, IllegalAccessException
{
return getBoolean(null, obj);
}
public char getChar (Object obj)
throws IllegalArgumentException, IllegalAccessException
{
return getChar(null, obj);
}
public byte getByte (Object obj)
throws IllegalArgumentException, IllegalAccessException
{
return getByte(null, obj);
}
public short getShort (Object obj)
throws IllegalArgumentException, IllegalAccessException
{
return getShort(null, obj);
}
public int getInt (Object obj)
throws IllegalArgumentException, IllegalAccessException
{
return getInt(null, obj);
}
public long getLong (Object obj)
throws IllegalArgumentException, IllegalAccessException
{
return getLong(null, obj);
}
public float getFloat (Object obj)
throws IllegalArgumentException, IllegalAccessException
{
return getFloat(null, obj);
}
public double getDouble (Object obj)
throws IllegalArgumentException, IllegalAccessException
{
return getDouble(null, obj);
}
public Object get (Object obj)
throws IllegalArgumentException, IllegalAccessException
{
return get(null, obj);
}
private native boolean getBoolean (Class caller, Object obj)
throws IllegalArgumentException, IllegalAccessException;
private native char getChar (Class caller, Object obj)
throws IllegalArgumentException, IllegalAccessException;
private native byte getByte (Class caller, Object obj)
throws IllegalArgumentException, IllegalAccessException;
private native short getShort (Class caller, Object obj)
throws IllegalArgumentException, IllegalAccessException;
private native int getInt (Class caller, Object obj)
throws IllegalArgumentException, IllegalAccessException;
private native long getLong (Class caller, Object obj)
throws IllegalArgumentException, IllegalAccessException;
private native float getFloat (Class caller, Object obj)
throws IllegalArgumentException, IllegalAccessException;
private native double getDouble (Class caller, Object obj)
throws IllegalArgumentException, IllegalAccessException;
public native Object get (Class caller, Object obj)
throws IllegalArgumentException, IllegalAccessException;
public void setByte (Object obj, byte b)
throws IllegalArgumentException, IllegalAccessException
{
setByte(null, obj, b);
}
public void setShort (Object obj, short s)
throws IllegalArgumentException, IllegalAccessException
{
setShort(null, obj, s);
}
public void setInt (Object obj, int i)
throws IllegalArgumentException, IllegalAccessException
{
setInt(null, obj, i);
}
public void setLong (Object obj, long l)
throws IllegalArgumentException, IllegalAccessException
{
setLong(null, obj, l);
}
public void setFloat (Object obj, float f)
throws IllegalArgumentException, IllegalAccessException
{
setFloat(null, obj, f);
}
public void setDouble (Object obj, double d)
throws IllegalArgumentException, IllegalAccessException
{
setDouble(null, obj, d);
}
public void setChar (Object obj, char c)
throws IllegalArgumentException, IllegalAccessException
{
setChar(null, obj, c);
}
public void setBoolean (Object obj, boolean b)
throws IllegalArgumentException, IllegalAccessException
{
setBoolean(null, obj, b);
}
public native void setByte (Class caller, Object obj, byte b)
throws IllegalArgumentException, IllegalAccessException;
public native void setShort (Class caller, Object obj, short s)
throws IllegalArgumentException, IllegalAccessException;
public native void setInt (Class caller, Object obj, int i)
throws IllegalArgumentException, IllegalAccessException;
public native void setLong (Class caller, Object obj, long l)
throws IllegalArgumentException, IllegalAccessException;
public native void setFloat (Class caller, Object obj, float f)
throws IllegalArgumentException, IllegalAccessException;
public native void setDouble (Class caller, Object obj, double d)
throws IllegalArgumentException, IllegalAccessException;
public native void setChar (Class caller, Object obj, char c)
throws IllegalArgumentException, IllegalAccessException;
public native void setBoolean (Class caller, Object obj, boolean b)
throws IllegalArgumentException, IllegalAccessException;
private native void set (Class caller, Object obj, Object val, Class type)
throws IllegalArgumentException, IllegalAccessException;
public void set (Object object, Object value)
throws IllegalArgumentException, IllegalAccessException
{
set(null, object, value);
}
public void set (Class caller, Object object, Object value)
throws IllegalArgumentException, IllegalAccessException
{
Class type = getType();
if (! type.isPrimitive())
set(caller, object, value, type);
else if (value instanceof Byte)
setByte(caller, object, ((Byte) value).byteValue());
else if (value instanceof Short)
setShort (caller, object, ((Short) value).shortValue());
else if (value instanceof Integer)
setInt(caller, object, ((Integer) value).intValue());
else if (value instanceof Long)
setLong(caller, object, ((Long) value).longValue());
else if (value instanceof Float)
setFloat(caller, object, ((Float) value).floatValue());
else if (value instanceof Double)
setDouble(caller, object, ((Double) value).doubleValue());
else if (value instanceof Character)
setChar(caller, object, ((Character) value).charValue());
else if (value instanceof Boolean)
setBoolean(caller, object, ((Boolean) value).booleanValue());
else
throw new IllegalArgumentException();
}
public String toString ()
{
StringBuffer sbuf = new StringBuffer ();
int mods = getModifiers();
if (mods != 0)
Modifier.toString(mods, sbuf);
sbuf.append(getType());
sbuf.append(' ');
sbuf.append(getDeclaringClass());
sbuf.append('.');
sbuf.append(getName());
return sbuf.toString();
}
}