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- /*
- * Javassist, a Java-bytecode translator toolkit.
- * Copyright (C) 1999-2003 Shigeru Chiba. All Rights Reserved.
- *
- * The contents of this file are subject to the Mozilla Public License Version
- * 1.1 (the "License"); you may not use this file except in compliance with
- * the License. Alternatively, the contents of this file may be used under
- * the terms of the GNU Lesser General Public License Version 2.1 or later.
- *
- * Software distributed under the License is distributed on an "AS IS" basis,
- * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
- * for the specific language governing rights and limitations under the
- * License.
- */
-
- package javassist.bytecode;
-
- import java.io.DataInputStream;
- import java.io.DataOutputStream;
- import java.io.IOException;
- import java.util.Hashtable;
- import java.util.List;
- import java.util.LinkedList;
-
- /**
- * <code>field_info</code> structure.
- *
- * @see javassist.CtField#getFieldInfo()
- */
- public final class FieldInfo {
- ConstPool constPool;
- int accessFlags;
- int name;
- int descriptor;
- LinkedList attribute; // may be null.
-
- private FieldInfo(ConstPool cp) {
- constPool = cp;
- accessFlags = 0;
- attribute = null;
- }
-
- /**
- * Constructs a <code>field_info</code> structure.
- *
- * @param cp a constant pool table
- * @param fieldName field name
- * @param desc field descriptor
- *
- * @see Descriptor
- */
- public FieldInfo(ConstPool cp, String fieldName, String desc) {
- this(cp);
- name = cp.addUtf8Info(fieldName);
- descriptor = cp.addUtf8Info(desc);
- }
-
- FieldInfo(ConstPool cp, DataInputStream in) throws IOException {
- this(cp);
- read(in);
- }
-
- /**
- * Returns the constant pool table used
- * by this <code>field_info</code>.
- */
- public ConstPool getConstPool() { return constPool; }
-
- /**
- * Returns the field name.
- */
- public String getName() {
- return constPool.getUtf8Info(name);
- }
-
- /**
- * Sets the field name.
- */
- public void setName(String newName) {
- name = constPool.addUtf8Info(newName);
- }
-
- /**
- * Returns the access flags.
- *
- * @see AccessFlag
- */
- public int getAccessFlags() {
- return accessFlags;
- }
-
- /**
- * Sets the access flags.
- *
- * @see AccessFlag
- */
- public void setAccessFlags(int acc) {
- accessFlags = acc;
- }
-
- /**
- * Returns the field descriptor.
- *
- * @see Descriptor
- */
- public String getDescriptor() {
- return constPool.getUtf8Info(descriptor);
- }
-
- /**
- * Sets the field descriptor.
- *
- * @see Descriptor
- */
- public void setDescriptor(String desc) {
- if (!desc.equals(getDescriptor()))
- descriptor = constPool.addUtf8Info(desc);
- }
-
- /**
- * Returns all the attributes.
- *
- * @return a list of <code>AttributeInfo</code> objects.
- * @see AttributeInfo
- */
- public List getAttributes() {
- if (attribute == null)
- attribute = new LinkedList();
-
- return attribute;
- }
-
- /**
- * Returns the attribute with the specified name.
- *
- * @param name attribute name
- */
- public AttributeInfo getAttribute(String name) {
- return AttributeInfo.lookup(attribute, name);
- }
-
- /**
- * Appends an attribute. If there is already an attribute with
- * the same name, the new one substitutes for it.
- */
- public void addAttribute(AttributeInfo info) {
- if (attribute == null)
- attribute = new LinkedList();
-
- AttributeInfo.remove(attribute, info.getName());
- attribute.add(info);
- }
-
- private void read(DataInputStream in) throws IOException {
- accessFlags = in.readUnsignedShort();
- name = in.readUnsignedShort();
- descriptor = in.readUnsignedShort();
- int n = in.readUnsignedShort();
- attribute = new LinkedList();
- for (int i = 0; i < n; ++i)
- attribute.add(AttributeInfo.read(constPool, in));
- }
-
- void write(DataOutputStream out) throws IOException {
- out.writeShort(accessFlags);
- out.writeShort(name);
- out.writeShort(descriptor);
- if (attribute == null)
- out.writeShort(0);
- else {
- out.writeShort(attribute.size());
- AttributeInfo.writeAll(attribute, out);
- }
- }
- }
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