| /******************************************************************************* |
| * Copyright (c) 2000, 2015 IBM Corporation and others. |
| * All rights reserved. This program and the accompanying materials |
| * are made available under the terms of the Eclipse Public License v1.0 |
| * which accompanies this distribution, and is available at |
| * http://www.eclipse.org/legal/epl-v10.html |
| * |
| * Contributors: |
| * IBM Corporation - initial API and implementation |
| * Stephan Herrmann - Contribution for |
| * Bug 440474 - [null] textual encoding of external null annotations |
| *******************************************************************************/ |
| package org.eclipse.jdt.internal.compiler.lookup; |
| |
| import org.eclipse.jdt.core.compiler.CharOperation; |
| |
| public class SignatureWrapper { |
| public char[] signature; |
| public int start; |
| public int end; |
| public int bracket; |
| private boolean use15specifics; |
| |
| public SignatureWrapper(char[] signature, boolean use15specifics) { |
| this.signature = signature; |
| this.start = 0; |
| this.end = this.bracket = -1; |
| this.use15specifics = use15specifics; |
| } |
| public SignatureWrapper(char [] signature) { |
| this(signature, true); |
| } |
| public boolean atEnd() { |
| return this.start < 0 || this.start >= this.signature.length; |
| } |
| public int computeEnd() { |
| int index = this.start; |
| while (this.signature[index] == '[') |
| index++; |
| switch (this.signature[index]) { |
| case 'L' : |
| case 'T' : |
| this.end = CharOperation.indexOf(';', this.signature, this.start); |
| if (this.bracket <= this.start) // already know it if its > start |
| this.bracket = CharOperation.indexOf('<', this.signature, this.start); |
| |
| if (this.bracket > this.start && this.bracket < this.end) |
| this.end = this.bracket; |
| else if (this.end == -1) |
| this.end = this.signature.length + 1; |
| break; |
| default : |
| this.end = this.start; |
| } |
| |
| if (this.use15specifics || this.end != this.bracket) { |
| this.start = this.end + 1; // skip ';' |
| } else { |
| this.start = skipAngleContents(this.end) + 1; // skip <<>*>; |
| this.bracket = -1; |
| } |
| return this.end; |
| } |
| // https://bugs.eclipse.org/bugs/show_bug.cgi?id=324850, do not expose generics if we shouldn't |
| public int skipAngleContents(int i) { |
| if (this.signature[i] != '<') { |
| return i; |
| } |
| int depth = 0, length = this.signature.length; |
| for (++i; i < length; i++) { |
| switch(this.signature[i]) { |
| case '<' : |
| depth++; |
| break; |
| case '>' : |
| if (--depth < 0) |
| return i + 1; |
| break; |
| } |
| } |
| return i; |
| } |
| public char[] nextWord() { |
| this.end = CharOperation.indexOf(';', this.signature, this.start); |
| if (this.bracket <= this.start) // already know it if its > start |
| this.bracket = CharOperation.indexOf('<', this.signature, this.start); |
| int dot = CharOperation.indexOf('.', this.signature, this.start); |
| |
| if (this.bracket > this.start && this.bracket < this.end) |
| this.end = this.bracket; |
| if (dot > this.start && dot < this.end) |
| this.end = dot; |
| |
| return CharOperation.subarray(this.signature, this.start, this.start = this.end); // skip word |
| } |
| /** similar to nextWord() but don't stop at '.' */ |
| public char[] nextName() { |
| this.end = CharOperation.indexOf(';', this.signature, this.start); |
| if (this.bracket <= this.start) // already know it if its > start |
| this.bracket = CharOperation.indexOf('<', this.signature, this.start); |
| |
| if (this.bracket > this.start && this.bracket < this.end) |
| this.end = this.bracket; |
| |
| return CharOperation.subarray(this.signature, this.start, this.start = this.end); // skip name |
| } |
| |
| /** answer the next type (incl. type arguments), but don't advance any cursors */ |
| public char[] peekFullType() { |
| int s = this.start, b = this.bracket, e = this.end; |
| int peekEnd = skipAngleContents(computeEnd()); |
| this.start = s; |
| this.bracket = b; |
| this.end = e; |
| return CharOperation.subarray(this.signature, s, peekEnd+1); |
| } |
| |
| /** |
| * assuming a previously stored start of 's' followed by a call to computeEnd() |
| * now retrieve the content between these bounds including trailing angle content |
| */ |
| public char[] getFrom(int s) { |
| if (this.end == this.bracket) { |
| this.end = skipAngleContents(this.bracket); |
| this.start = this.end + 1; |
| } |
| return CharOperation.subarray(this.signature, s, this.end+1); |
| } |
| public char[] tail() { |
| return CharOperation.subarray(this.signature, this.start, this.signature.length); |
| } |
| public String toString() { |
| return new String(this.signature) + " @ " + this.start; //$NON-NLS-1$ |
| } |
| } |