274 lines
8.0 KiB
Java
274 lines
8.0 KiB
Java
/* Copyright (C) 1998, 1999, 2000, 2001 Free Software Foundation
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This file is part of libgcj.
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This software is copyrighted work licensed under the terms of the
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Libgcj License. Please consult the file "LIBGCJ_LICENSE" for
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details. */
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package java.lang.reflect;
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/**
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* @author Per Bothner <bothner@cygnus.com>
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* @date September 1998; February 1999.
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*/
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/* Status: Mostly implemented.
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* However, access checks are not implemented. See natField.cc for
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* _Jv_CheckFieldAccessibility as well as the missing getCaller.
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* Note that the idea is to have to compiler convert calls to
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* setXXX(...) and getXXX(...) to setXXX(CALLER, ...) and getXXX(CALLER, ...),
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* where CALLER is reference to the class that contains the calls to
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* setXXX or getXXX. This is easy for the compiler, and replaces
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* expensive stack and table searching with a constant.
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*/
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public final class Field extends AccessibleObject implements Member
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{
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private Class declaringClass;
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// This is filled in by getName.
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private String name;
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// Offset in bytes from the start of declaringClass's fields array.
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private int offset;
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// This is instantiated by Class sometimes, but it uses C++ and
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// avoids the Java protection check.
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Field ()
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{
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}
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public boolean equals (Object fld)
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{
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if (! (fld instanceof Field))
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return false;
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Field f = (Field) fld;
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return declaringClass == f.declaringClass && offset == f.offset;
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}
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public Class getDeclaringClass ()
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{
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return declaringClass;
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}
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public native String getName ();
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public native Class getType ();
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public native int getModifiers ();
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public int hashCode()
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{
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return (declaringClass.hashCode() ^ offset);
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}
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// The idea is that the compiler will magically translate
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// fld.getShort(obj) to fld.getShort(THISCLASS, obj).
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// This makes checking assessiblity more efficient,
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// since we don't have to do any stack-walking.
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public boolean getBoolean (Object obj)
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throws IllegalArgumentException, IllegalAccessException
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{
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return getBoolean(null, obj);
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}
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public char getChar (Object obj)
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throws IllegalArgumentException, IllegalAccessException
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{
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return getChar(null, obj);
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}
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public byte getByte (Object obj)
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throws IllegalArgumentException, IllegalAccessException
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{
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return getByte(null, obj);
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}
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public short getShort (Object obj)
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throws IllegalArgumentException, IllegalAccessException
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{
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return getShort(null, obj);
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}
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public int getInt (Object obj)
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throws IllegalArgumentException, IllegalAccessException
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{
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return getInt(null, obj);
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}
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public long getLong (Object obj)
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throws IllegalArgumentException, IllegalAccessException
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{
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return getLong(null, obj);
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}
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public float getFloat (Object obj)
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throws IllegalArgumentException, IllegalAccessException
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{
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return getFloat(null, obj);
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}
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public double getDouble (Object obj)
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throws IllegalArgumentException, IllegalAccessException
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{
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return getDouble(null, obj);
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}
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public Object get (Object obj)
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throws IllegalArgumentException, IllegalAccessException
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{
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return get(null, obj);
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}
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private native boolean getBoolean (Class caller, Object obj)
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throws IllegalArgumentException, IllegalAccessException;
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private native char getChar (Class caller, Object obj)
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throws IllegalArgumentException, IllegalAccessException;
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private native byte getByte (Class caller, Object obj)
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throws IllegalArgumentException, IllegalAccessException;
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private native short getShort (Class caller, Object obj)
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throws IllegalArgumentException, IllegalAccessException;
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private native int getInt (Class caller, Object obj)
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throws IllegalArgumentException, IllegalAccessException;
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private native long getLong (Class caller, Object obj)
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throws IllegalArgumentException, IllegalAccessException;
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private native float getFloat (Class caller, Object obj)
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throws IllegalArgumentException, IllegalAccessException;
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private native double getDouble (Class caller, Object obj)
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throws IllegalArgumentException, IllegalAccessException;
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private native Object get (Class caller, Object obj)
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throws IllegalArgumentException, IllegalAccessException;
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public void setByte (Object obj, byte b)
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throws IllegalArgumentException, IllegalAccessException
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{
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setByte(null, obj, b);
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}
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public void setShort (Object obj, short s)
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throws IllegalArgumentException, IllegalAccessException
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{
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setShort(null, obj, s);
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}
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public void setInt (Object obj, int i)
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throws IllegalArgumentException, IllegalAccessException
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{
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setInt(null, obj, i);
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}
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public void setLong (Object obj, long l)
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throws IllegalArgumentException, IllegalAccessException
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{
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setLong(null, obj, l);
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}
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public void setFloat (Object obj, float f)
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throws IllegalArgumentException, IllegalAccessException
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{
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setFloat(null, obj, f);
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}
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public void setDouble (Object obj, double d)
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throws IllegalArgumentException, IllegalAccessException
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{
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setDouble(null, obj, d);
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}
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public void setChar (Object obj, char c)
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throws IllegalArgumentException, IllegalAccessException
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{
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setChar(null, obj, c);
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}
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public void setBoolean (Object obj, boolean b)
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throws IllegalArgumentException, IllegalAccessException
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{
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setBoolean(null, obj, b);
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}
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private native void setByte (Class caller, Object obj, byte b)
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throws IllegalArgumentException, IllegalAccessException;
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private native void setShort (Class caller, Object obj, short s)
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throws IllegalArgumentException, IllegalAccessException;
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private native void setInt (Class caller, Object obj, int i)
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throws IllegalArgumentException, IllegalAccessException;
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private native void setLong (Class caller, Object obj, long l)
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throws IllegalArgumentException, IllegalAccessException;
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private native void setFloat (Class caller, Object obj, float f)
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throws IllegalArgumentException, IllegalAccessException;
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private native void setDouble (Class caller, Object obj, double d)
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throws IllegalArgumentException, IllegalAccessException;
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private native void setChar (Class caller, Object obj, char c)
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throws IllegalArgumentException, IllegalAccessException;
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private native void setBoolean (Class caller, Object obj, boolean b)
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throws IllegalArgumentException, IllegalAccessException;
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private native void set (Class caller, Object obj, Object val, Class type)
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throws IllegalArgumentException, IllegalAccessException;
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public void set (Object object, Object value)
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throws IllegalArgumentException, IllegalAccessException
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{
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set(null, object, value);
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}
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private void set (Class caller, Object object, Object value)
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throws IllegalArgumentException, IllegalAccessException
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{
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Class type = getType();
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if (! type.isPrimitive())
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set(caller, object, value, type);
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else if (value instanceof Byte)
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setByte(caller, object, ((Byte) value).byteValue());
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else if (value instanceof Short)
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setShort (caller, object, ((Short) value).shortValue());
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else if (value instanceof Integer)
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setInt(caller, object, ((Integer) value).intValue());
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else if (value instanceof Long)
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setLong(caller, object, ((Long) value).longValue());
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else if (value instanceof Float)
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setFloat(caller, object, ((Float) value).floatValue());
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else if (value instanceof Double)
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setDouble(caller, object, ((Double) value).doubleValue());
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else if (value instanceof Character)
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setChar(caller, object, ((Character) value).charValue());
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else if (value instanceof Boolean)
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setBoolean(caller, object, ((Boolean) value).booleanValue());
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else
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throw new IllegalArgumentException();
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}
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public String toString ()
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{
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StringBuffer sbuf = new StringBuffer ();
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int mods = getModifiers();
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if (mods != 0)
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{
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Modifier.toString(mods, sbuf);
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sbuf.append(' ');
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}
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Method.appendClassName (sbuf, getType ());
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sbuf.append(' ');
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Method.appendClassName (sbuf, getDeclaringClass());
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sbuf.append('.');
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sbuf.append(getName());
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return sbuf.toString();
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}
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}
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