- /*
- * Copyright 2001-2002,2004 The Apache Software Foundation
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- * http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- *
- */
- package org.apache.tools.ant.taskdefs.optional.sitraka.bytecode;
-
- import java.io.DataInputStream;
- import java.io.IOException;
- import org.apache.tools.ant.taskdefs.optional.depend.constantpool.ConstantPool;
- import org.apache.tools.ant.taskdefs.optional.sitraka.bytecode.attributes.AttributeInfo;
-
- /**
- * Method info structure.
- * @todo give a more appropriate name to methods.
- *
- */
- public final class MethodInfo {
- private int access_flags;
- private int loc = -1;
- private String name;
- private String descriptor;
-
- public MethodInfo() {
- }
-
- public void read(ConstantPool constantPool, DataInputStream dis) throws IOException {
- access_flags = dis.readShort();
-
- int name_index = dis.readShort();
- name = Utils.getUTF8Value(constantPool, name_index);
-
- int descriptor_index = dis.readShort();
- descriptor = Utils.getUTF8Value(constantPool, descriptor_index);
-
- int attributes_count = dis.readUnsignedShort();
- for (int i = 0; i < attributes_count; i++) {
- int attr_id = dis.readShort();
- String attr_name = Utils.getUTF8Value(constantPool, attr_id);
- int len = dis.readInt();
- if (AttributeInfo.CODE.equals(attr_name)) {
- readCode(constantPool, dis);
- } else {
- dis.skipBytes(len);
- }
- }
-
- }
-
- protected void readCode(ConstantPool constantPool, DataInputStream dis) throws IOException {
- // skip max_stack (short), max_local (short)
- dis.skipBytes(2 * 2);
-
- // skip bytecode...
- int bytecode_len = dis.readInt();
- dis.skip(bytecode_len);
-
- // skip exceptions... 1 exception = 4 short.
- int exception_count = dis.readShort();
- dis.skipBytes(exception_count * 4 * 2);
-
- // read attributes...
- int attributes_count = dis.readUnsignedShort();
- for (int i = 0; i < attributes_count; i++) {
- int attr_id = dis.readShort();
- String attr_name = Utils.getUTF8Value(constantPool, attr_id);
- int len = dis.readInt();
- if (AttributeInfo.LINE_NUMBER_TABLE.equals(attr_name)) {
- // we're only interested in lines of code...
- loc = dis.readShort();
- // skip the table which is 2*loc*short
- dis.skip(loc * 2 * 2);
- } else {
- dis.skipBytes(len);
- }
- }
- }
-
- public int getAccessFlags() {
- return access_flags;
- }
-
- public String getName() {
- return name;
- }
-
- public String getDescriptor() {
- return descriptor;
- }
-
- public String getFullSignature() {
- return getReturnType() + " " + getShortSignature();
- }
-
- public String getShortSignature() {
- StringBuffer buf = new StringBuffer(getName());
- buf.append("(");
- String[] params = getParametersType();
- for (int i = 0; i < params.length; i++) {
- buf.append(params[i]);
- if (i != params.length - 1) {
- buf.append(", ");
- }
- }
- buf.append(")");
- return buf.toString();
- }
-
- public String getReturnType() {
- return Utils.getMethodReturnType(getDescriptor());
- }
-
- public String[] getParametersType() {
- return Utils.getMethodParams(getDescriptor());
- }
-
- public int getNumberOfLines() {
- return loc;
- }
-
- public String getAccess() {
- return Utils.getMethodAccess(access_flags);
- }
-
- public String toString() {
- StringBuffer sb = new StringBuffer();
- sb.append("Method: ").append(getAccess()).append(" ");
- sb.append(getFullSignature());
- return sb.toString();
- }
- }
-
-