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test/tools/javac/lambdaShapes/org/openjdk/tests/separate/ClassToInterfaceConverter.java@2eb010b6cb22 (annotated)

test/tools/javac/lambdaShapes/org/openjdk/tests/separate/ClassToInterfaceConverter.java

Thu, 31 Aug 2017 15:17:03 +0800

author

aoqi

date

Thu, 31 Aug 2017 15:17:03 +0800

changeset 2525

2eb010b6cb22

parent 1448

7d34e91f66bb

parent 0

959103a6100f

permissions

-rw-r--r--

merge

aoqi@0	1	/*
aoqi@0	2	* Copyright (c) 2012, Oracle and/or its affiliates. All rights reserved.
aoqi@0	3	* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
aoqi@0	4	*
aoqi@0	5	* This code is free software; you can redistribute it and/or modify it
aoqi@0	6	* under the terms of the GNU General Public License version 2 only, as
aoqi@0	7	* published by the Free Software Foundation. Oracle designates this
aoqi@0	8	* particular file as subject to the "Classpath" exception as provided
aoqi@0	9	* by Oracle in the LICENSE file that accompanied this code.
aoqi@0	10	*
aoqi@0	11	* This code is distributed in the hope that it will be useful, but WITHOUT
aoqi@0	12	* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
aoqi@0	13	* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
aoqi@0	14	* version 2 for more details (a copy is included in the LICENSE file that
aoqi@0	15	* accompanied this code).
aoqi@0	16	*
aoqi@0	17	* You should have received a copy of the GNU General Public License version
aoqi@0	18	* 2 along with this work; if not, write to the Free Software Foundation,
aoqi@0	19	* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
aoqi@0	20	*
aoqi@0	21	* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
aoqi@0	22	* or visit www.oracle.com if you need additional information or have any
aoqi@0	23	* questions.
aoqi@0	24	*/
aoqi@0	25
aoqi@0	26	package org.openjdk.tests.separate;
aoqi@0	27
aoqi@0	28	import java.io.*;
aoqi@0	29	import java.util.*;
aoqi@0	30
aoqi@0	31	public class ClassToInterfaceConverter implements ClassFilePreprocessor {
aoqi@0	32
aoqi@0	33	private String whichClass;
aoqi@0	34
aoqi@0	35	public ClassToInterfaceConverter(String className) {
aoqi@0	36	this.whichClass = className;
aoqi@0	37	}
aoqi@0	38
aoqi@0	39	private boolean utf8Matches(ClassFile.CpEntry entry, String v) {
aoqi@0	40	if (!(entry instanceof ClassFile.CpUtf8)) {
aoqi@0	41	return false;
aoqi@0	42	}
aoqi@0	43	ClassFile.CpUtf8 utf8 = (ClassFile.CpUtf8)entry;
aoqi@0	44	if (v.length() != utf8.bytes.length) {
aoqi@0	45	return false;
aoqi@0	46	}
aoqi@0	47	for (int i = 0; i < v.length(); ++i) {
aoqi@0	48	if (v.charAt(i) != utf8.bytes[i]) {
aoqi@0	49	return false;
aoqi@0	50	}
aoqi@0	51	}
aoqi@0	52	return true;
aoqi@0	53	}
aoqi@0	54
aoqi@0	55	private void convertToInterface(ClassFile cf) {
aoqi@0	56	cf.access_flags = 0x0601; // ACC_INTERFACE | ACC_ABSTRACT | ACC_PUBLIC
aoqi@0	57	ArrayList<ClassFile.Method> new_methods = new ArrayList<>();
aoqi@0	58	// Find <init> method and delete it
aoqi@0	59	for (int i = 0; i < cf.methods.size(); ++i) {
aoqi@0	60	ClassFile.Method method = cf.methods.get(i);
aoqi@0	61	ClassFile.CpEntry name = cf.constant_pool.get(method.name_index);
aoqi@0	62	if (!utf8Matches(name, "<init>")) {
aoqi@0	63	new_methods.add(method);
aoqi@0	64	}
aoqi@0	65	}
aoqi@0	66	cf.methods = new_methods;
aoqi@0	67	}
aoqi@0	68
aoqi@0	69	public byte[] preprocess(String classname, byte[] bytes) {
aoqi@0	70	ClassFile cf = new ClassFile(bytes);
aoqi@0	71
aoqi@0	72	ClassFile.CpEntry entry = cf.constant_pool.get(cf.this_class);
aoqi@0	73	ClassFile.CpEntry name = cf.constant_pool.get(
aoqi@0	74	((ClassFile.CpClass)entry).name_index);
aoqi@0	75	if (utf8Matches(name, whichClass)) {
aoqi@0	76	convertToInterface(cf);
aoqi@0	77	return cf.toByteArray();
aoqi@0	78	} else {
aoqi@0	79	return bytes; // unmodified
aoqi@0	80	}
aoqi@0	81	}
aoqi@0	82
aoqi@0	83	/*
aoqi@0	84	public static void main(String argv[]) throws Exception {
aoqi@0	85	File input = new File(argv[0]);
aoqi@0	86	byte[] buffer = new byte[(int)input.length()];
aoqi@0	87	new FileInputStream(input).read(buffer);
aoqi@0	88
aoqi@0	89	ClassFilePreprocessor cfp = new ClassToInterfaceConverter("Hello");
aoqi@0	90	byte[] cf = cfp.preprocess(argv[0], buffer);
aoqi@0	91	new FileOutputStream(argv[0] + ".mod").write(cf);
aoqi@0	92	}
aoqi@0	93	*/
aoqi@0	94	}