1 /* 2 * Copyright (c) 2022, 2025, Oracle and/or its affiliates. All rights reserved. 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. 4 * 5 * This code is free software; you can redistribute it and/or modify it 6 * under the terms of the GNU General Public License version 2 only, as 7 * published by the Free Software Foundation. Oracle designates this 8 * particular file as subject to the "Classpath" exception as provided 9 * by Oracle in the LICENSE file that accompanied this code. 10 * 11 * This code is distributed in the hope that it will be useful, but WITHOUT 12 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 13 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 14 * version 2 for more details (a copy is included in the LICENSE file that 15 * accompanied this code). 16 * 17 * You should have received a copy of the GNU General Public License version 18 * 2 along with this work; if not, write to the Free Software Foundation, 19 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. 20 * 21 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA 22 * or visit www.oracle.com if you need additional information or have any 23 * questions. 24 */ 25 26 package jdk.internal.classfile.impl; 27 28 import java.lang.classfile.CustomAttribute; 29 import java.lang.classfile.FieldBuilder; 30 import java.lang.classfile.FieldElement; 31 import java.lang.classfile.FieldModel; 32 import java.lang.classfile.constantpool.Utf8Entry; 33 import java.util.function.Consumer; 34 35 import static java.util.Objects.requireNonNull; 36 37 public final class DirectFieldBuilder 38 extends AbstractDirectBuilder<FieldModel> 39 implements TerminalFieldBuilder, WritableField { 40 private final Utf8Entry name; 41 private final Utf8Entry desc; 42 private int flags; 43 44 public DirectFieldBuilder(SplitConstantPool constantPool, 45 ClassFileImpl context, 46 Utf8Entry name, 47 Utf8Entry type, 48 int flags, 49 FieldModel original) { 50 super(constantPool, context); 51 setOriginal(original); 52 this.name = requireNonNull(name); 53 this.desc = requireNonNull(type); 54 this.flags = flags; 55 } 56 57 @Override 58 public FieldBuilder with(FieldElement element) { 59 if (element instanceof AbstractElement ae) { 60 ae.writeTo(this); 61 } else { 62 writeAttribute((CustomAttribute<?>) requireNonNull(element)); 63 } 64 return this; 65 } 66 67 public DirectFieldBuilder run(Consumer<? super FieldBuilder> handler) { 68 handler.accept(this); 69 return this; 70 } 71 72 @Override 73 public FieldBuilder withFlags(int flags) { 74 setFlags(flags); 75 return this; 76 } 77 78 void setFlags(int flags) { 79 this.flags = flags; 80 } 81 82 @Override 83 public void writeTo(BufWriterImpl buf) { 84 buf.writeU2U2U2(flags, buf.cpIndex(name), buf.cpIndex(desc)); 85 attributes.writeTo(buf); 86 } 87 88 // These values must only be accessed after the field is definitely configured 89 @Override 90 public Utf8Entry fieldName() { 91 return name; 92 } 93 94 @Override 95 public Utf8Entry fieldType() { 96 return desc; 97 } 98 99 @Override 100 public int fieldFlags() { 101 return flags; 102 } 103 }