149 lines
6.0 KiB
Java
149 lines
6.0 KiB
Java
/*
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* Copyright (c) 1996, 2013, Oracle and/or its affiliates. All rights reserved.
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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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*
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* This code is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License version 2 only, as
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* published by the Free Software Foundation. Oracle designates this
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* particular file as subject to the "Classpath" exception as provided
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* by Oracle in the LICENSE file that accompanied this code.
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*
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* This code is distributed in the hope that it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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* version 2 for more details (a copy is included in the LICENSE file that
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* accompanied this code).
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*
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* You should have received a copy of the GNU General Public License version
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* 2 along with this work; if not, write to the Free Software Foundation,
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* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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*
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* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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* or visit www.oracle.com if you need additional information or have any
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* questions.
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*/
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/*
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* (C) Copyright Taligent, Inc. 1996, 1997 - All Rights Reserved
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* (C) Copyright IBM Corp. 1996 - 1998 - All Rights Reserved
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*
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* The original version of this source code and documentation is copyrighted
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* and owned by Taligent, Inc., a wholly-owned subsidiary of IBM. These
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* materials are provided under terms of a License Agreement between Taligent
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* and Sun. This technology is protected by multiple US and International
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* patents. This notice and attribution to Taligent may not be removed.
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* Taligent is a registered trademark of Taligent, Inc.
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*
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*/
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package com.moparisthebest.text;
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import java.lang.reflect.InvocationTargetException;
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import java.lang.reflect.Method;
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import java.text.FieldPosition;
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import java.text.Format;
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/**
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* This implementation delegates to the real interface/implementation
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* found in java.text.Format$FieldDelegate
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* <p/>
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* FieldDelegate is notified by the various <code>Format</code>
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* implementations as they are formatting the Objects. This allows for
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* storage of the individual sections of the formatted String for
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* later use, such as in a <code>FieldPosition</code> or for an
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* <code>AttributedCharacterIterator</code>.
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* <p/>
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* Delegates should NOT assume that the <code>Format</code> will notify
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* the delegate of fields in any particular order.
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*
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* @see java.text.FieldPosition#getFieldDelegate
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* @see java.text.CharacterIteratorFieldDelegate
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*/
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public class FieldDelegate {
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private static final Method getFieldDelegate;
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private static final Method format1;
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private static final Method format2;
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static {
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Method gfd = null, f1 = null, f2 = null;
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try {
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gfd = FieldPosition.class.getDeclaredMethod("getFieldDelegate");
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gfd.setAccessible(true);
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final Class<?> realFieldDelegate = Class.forName("java.text.Format$FieldDelegate");
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f1 = realFieldDelegate.getDeclaredMethod("formatted", Format.Field.class, Object.class, int.class, int.class, StringBuffer.class);
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f1.setAccessible(true);
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f2 = realFieldDelegate.getDeclaredMethod("formatted", int.class, Format.Field.class, Object.class, int.class, int.class, StringBuffer.class);
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f2.setAccessible(true);
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} catch (Throwable e) {
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throw new RuntimeException(DecimalFormat.DECIMAL_FORMAT_EXCEPTION, e);
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}
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getFieldDelegate = gfd;
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format1 = f1;
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format2 = f2;
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}
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private final Object fieldDelegate;
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public FieldDelegate(final FieldPosition fieldPosition) {
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//this(fieldPosition.getFieldDelegate());
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Object fieldDelegate = null;
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if (fieldPosition != null)
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try {
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fieldDelegate = getFieldDelegate.invoke(fieldPosition);
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} catch (Throwable e) {
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throw new RuntimeException(DecimalFormat.DECIMAL_FORMAT_EXCEPTION, e);
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}
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this.fieldDelegate = fieldDelegate;
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}
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public FieldDelegate(final Object fieldDelegate) {
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this.fieldDelegate = fieldDelegate;
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}
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/**
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* Notified when a particular region of the String is formatted. This
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* method will be invoked if there is no corresponding integer field id
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* matching <code>attr</code>.
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*
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* @param attr Identifies the field matched
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* @param value Value associated with the field
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* @param start Beginning location of the field, will be >= 0
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* @param end End of the field, will be >= start and <= buffer.length()
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* @param buffer Contains current formatted value, receiver should
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* NOT modify it.
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*/
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public void formatted(Format.Field attr, Object value, int start,
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int end, StringBuffer buffer) {
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try {
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format1.invoke(this.fieldDelegate, attr, value, start, end, buffer);
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} catch (IllegalAccessException | InvocationTargetException e) {
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throw new RuntimeException(DecimalFormat.DECIMAL_FORMAT_EXCEPTION, e);
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}
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}
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/**
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* Notified when a particular region of the String is formatted.
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*
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* @param fieldID Identifies the field by integer
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* @param attr Identifies the field matched
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* @param value Value associated with the field
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* @param start Beginning location of the field, will be >= 0
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* @param end End of the field, will be >= start and <= buffer.length()
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* @param buffer Contains current formatted value, receiver should
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* NOT modify it.
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*/
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public void formatted(int fieldID, Format.Field attr, Object value,
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int start, int end, StringBuffer buffer) {
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try {
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format2.invoke(this.fieldDelegate, fieldID, attr, value, start, end, buffer);
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} catch (IllegalAccessException | InvocationTargetException e) {
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throw new RuntimeException(DecimalFormat.DECIMAL_FORMAT_EXCEPTION, e);
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}
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}
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}
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