+++ /dev/null
-/*******************************************************************************
- * Copyright (c) 2000, 2004 IBM Corporation and others.
- * All rights reserved. This program and the accompanying materials
- * are made available under the terms of the Common Public License v1.0
- * which accompanies this distribution, and is available at
- * http://www.eclipse.org/legal/cpl-v10.html
- *
- * Contributors:
- * IBM Corporation - initial API and implementation
- *******************************************************************************/
-package org.eclipse.jdt.internal.compiler.classfmt;
-
-import org.eclipse.jdt.core.compiler.CharOperation;
-import org.eclipse.jdt.internal.compiler.codegen.AttributeNamesConstants;
-import org.eclipse.jdt.internal.compiler.env.IBinaryMethod;
-
-public class MethodInfo extends ClassFileStruct implements IBinaryMethod, AttributeNamesConstants, Comparable {
- private char[][] exceptionNames;
- private int[] constantPoolOffsets;
- private boolean isDeprecated;
- private boolean isSynthetic;
- private int accessFlags;
- private char[] name;
- private char[] signature;
- private int attributeBytes;
- static private final char[][] noException = CharOperation.NO_CHAR_CHAR;
-/**
- * @param classFileBytes byte[]
- * @param offsets int[]
- * @param offset int
- */
-public MethodInfo (byte classFileBytes[], int offsets[], int offset) {
- super(classFileBytes, offset);
- constantPoolOffsets = offsets;
- accessFlags = -1;
- int attributesCount = u2At(6);
- int readOffset = 8;
- for (int i = 0; i < attributesCount; i++) {
- readOffset += (6 + u4At(readOffset + 2));
- }
- attributeBytes = readOffset;
-}
-/**
- * @see org.eclipse.jdt.internal.compiler.env.IGenericMethod#getArgumentNames()
- */
-public char[][] getArgumentNames() {
- return null;
-}
-/**
- * Answer the resolved names of the exception types in the
- * class file format as specified in section 4.2 of the Java 2 VM spec
- * or null if the array is empty.
- *
- * For example, java.lang.String is java/lang/String.
- * @return char[][]
- */
-public char[][] getExceptionTypeNames() {
- if (exceptionNames == null) {
- readExceptionAttributes();
- }
- return exceptionNames;
-}
-/**
- * Answer the receiver's method descriptor which describes the parameter &
- * return types as specified in section 4.3.3 of the Java 2 VM spec.
- *
- * For example:
- * - int foo(String) is (Ljava/lang/String;)I
- * - void foo(Object[]) is (I)[Ljava/lang/Object;
- * @return char[]
- */
-public char[] getMethodDescriptor() {
- if (signature == null) {
- // read the name
- int utf8Offset = constantPoolOffsets[u2At(4)] - structOffset;
- signature = utf8At(utf8Offset + 3, u2At(utf8Offset + 1));
- }
- return signature;
-}
-/**
- * Answer an int whose bits are set according the access constants
- * defined by the VM spec.
- * Set the AccDeprecated and AccSynthetic bits if necessary
- * @return int
- */
-public int getModifiers() {
- if (accessFlags == -1) {
- // compute the accessflag. Don't forget the deprecated attribute
- accessFlags = u2At(0);
- readDeprecatedAndSyntheticAttributes();
- if (isDeprecated) {
- accessFlags |= AccDeprecated;
- }
- if (isSynthetic) {
- accessFlags |= AccSynthetic;
- }
- }
- return accessFlags;
-}
-/**
- * Answer the name of the method.
- *
- * For a constructor, answer <init> & <clinit> for a clinit method.
- * @return char[]
- */
-public char[] getSelector() {
- if (name == null) {
- // read the name
- int utf8Offset = constantPoolOffsets[u2At(2)] - structOffset;
- name = utf8At(utf8Offset + 3, u2At(utf8Offset + 1));
- }
- return name;
-}
-/**
- * Answer true if the method is a class initializer, false otherwise.
- * @return boolean
- */
-public boolean isClinit() {
- char[] selector = getSelector();
- return selector[0] == '<' && selector.length == 8; // Can only match <clinit>
-}
-/**
- * Answer true if the method is a constructor, false otherwise.
- * @return boolean
- */
-public boolean isConstructor() {
- char[] selector = getSelector();
- return selector[0] == '<' && selector.length == 6; // Can only match <init>
-}
-/**
- * Return true if the field is a synthetic method, false otherwise.
- * @return boolean
- */
-public boolean isSynthetic() {
- return (getModifiers() & AccSynthetic) != 0;
-}
-private void readDeprecatedAndSyntheticAttributes() {
- int attributesCount = u2At(6);
- int readOffset = 8;
- for (int i = 0; i < attributesCount; i++) {
- int utf8Offset = constantPoolOffsets[u2At(readOffset)] - structOffset;
- char[] attributeName = utf8At(utf8Offset + 3, u2At(utf8Offset + 1));
- if (CharOperation.equals(attributeName, DeprecatedName)) {
- isDeprecated = true;
- } else if (CharOperation.equals(attributeName, SyntheticName)) {
- isSynthetic = true;
- }
- readOffset += (6 + u4At(readOffset + 2));
- }
-}
-private void readExceptionAttributes() {
- int attributesCount = u2At(6);
- int readOffset = 8;
- for (int i = 0; i < attributesCount; i++) {
- int utf8Offset = constantPoolOffsets[u2At(readOffset)] - structOffset;
- char[] attributeName = utf8At(utf8Offset + 3, u2At(utf8Offset + 1));
- if (CharOperation.equals(attributeName, ExceptionsName)) {
- // read the number of exception entries
- int entriesNumber = u2At(readOffset + 6);
- // place the readOffset at the beginning of the exceptions table
- readOffset += 8;
- if (entriesNumber == 0) {
- exceptionNames = noException;
- } else {
- exceptionNames = new char[entriesNumber][];
- for (int j = 0; j < entriesNumber; j++) {
- utf8Offset =
- constantPoolOffsets[u2At(
- constantPoolOffsets[u2At(readOffset)] - structOffset + 1)]
- - structOffset;
- exceptionNames[j] = utf8At(utf8Offset + 3, u2At(utf8Offset + 1));
- readOffset += 2;
- }
- }
- } else {
- readOffset += (6 + u4At(readOffset + 2));
- }
- }
- if (exceptionNames == null) {
- exceptionNames = noException;
- }
-}
-/**
- * Answer the size of the receiver in bytes.
- *
- * @return int
- */
-public int sizeInBytes() {
- return attributeBytes;
-}
-public String toString() {
- int modifiers = getModifiers();
- StringBuffer buffer = new StringBuffer(this.getClass().getName());
- return buffer
- .append("{") //$NON-NLS-1$
- .append(
- ((modifiers & AccDeprecated) != 0 ? "deprecated " : "") //$NON-NLS-1$ //$NON-NLS-2$
- + ((modifiers & 0x0001) == 1 ? "public " : "") //$NON-NLS-1$ //$NON-NLS-2$
- + ((modifiers & 0x0002) == 0x0002 ? "private " : "") //$NON-NLS-1$ //$NON-NLS-2$
- + ((modifiers & 0x0004) == 0x0004 ? "protected " : "") //$NON-NLS-1$ //$NON-NLS-2$
- + ((modifiers & 0x0008) == 0x000008 ? "static " : "") //$NON-NLS-1$ //$NON-NLS-2$
- + ((modifiers & 0x0010) == 0x0010 ? "final " : "") //$NON-NLS-1$ //$NON-NLS-2$
- + ((modifiers & 0x0040) == 0x0040 ? "volatile " : "") //$NON-NLS-1$ //$NON-NLS-2$
- + ((modifiers & 0x0080) == 0x0080 ? "transient " : "")) //$NON-NLS-1$ //$NON-NLS-2$
- .append(getSelector())
- .append(getMethodDescriptor())
- .append("}") //$NON-NLS-1$
- .toString();
-}
-public int compareTo(Object o) {
- if (!(o instanceof MethodInfo)) {
- throw new ClassCastException();
- }
-
- MethodInfo otherMethod = (MethodInfo) o;
- int result = new String(this.getSelector()).compareTo(new String(otherMethod.getSelector()));
- if (result != 0) return result;
- return new String(this.getMethodDescriptor()).compareTo(new String(otherMethod.getMethodDescriptor()));
-}
-
-/**
- * This method is used to fully initialize the contents of the receiver. All methodinfos, fields infos
- * will be therefore fully initialized and we can get rid of the bytes.
- */
-void initialize() {
- getModifiers();
- getSelector();
- getMethodDescriptor();
- getExceptionTypeNames();
- reset();
-}
-protected void reset() {
- this.constantPoolOffsets = null;
- super.reset();
-}
-}
projects / org.ibex.tool.git / blobdiff