| /******************************************************************************* |
| * Copyright (c) 2000, 2013 IBM Corporation and others. |
| * |
| * This program and the accompanying materials |
| * are made available under the terms of the Eclipse Public License 2.0 |
| * which accompanies this distribution, and is available at |
| * https://www.eclipse.org/legal/epl-2.0/ |
| * |
| * SPDX-License-Identifier: EPL-2.0 |
| * |
| * Contributors: |
| * IBM Corporation - initial API and implementation |
| * Andy Clement (GoPivotal, Inc) aclement@gopivotal.com - Contributions for |
| * Bug 383624 - [1.8][compiler] Revive code generation support for type annotations (from Olivier's work) |
| *******************************************************************************/ |
| package org.eclipse.jdt.internal.compiler.codegen; |
| |
| import org.eclipse.jdt.core.compiler.CharOperation; |
| import org.eclipse.jdt.internal.compiler.ast.Annotation; |
| import org.eclipse.jdt.internal.compiler.ast.TypeReference; |
| import org.eclipse.jdt.internal.compiler.lookup.TypeBinding; |
| |
| public class ExceptionLabel extends Label { |
| |
| public int ranges[] = {POS_NOT_SET,POS_NOT_SET}; |
| private int count = 0; // incremented each time placeStart or placeEnd is called |
| public TypeBinding exceptionType; |
| public TypeReference exceptionTypeReference; |
| public Annotation [] se7Annotations; |
| |
| public ExceptionLabel(CodeStream codeStream, TypeBinding exceptionType, TypeReference exceptionTypeReference, Annotation [] se7Annotations) { |
| super(codeStream); |
| this.exceptionType = exceptionType; |
| this.exceptionTypeReference = exceptionTypeReference; |
| this.se7Annotations = se7Annotations; |
| } |
| |
| public ExceptionLabel(CodeStream codeStream, TypeBinding exceptionType) { |
| super(codeStream); |
| this.exceptionType = exceptionType; |
| } |
| public int getCount() { |
| return this.count; |
| } |
| @Override |
| public void place() { |
| // register the handler inside the codeStream then normal place |
| this.codeStream.registerExceptionHandler(this); |
| this.position = this.codeStream.getPosition(); |
| } |
| |
| public void placeEnd() { |
| int endPosition = this.codeStream.position; |
| if (this.ranges[this.count-1] == endPosition) { // start == end ? |
| // discard empty exception handler |
| this.count--; |
| } else { |
| this.ranges[this.count++] = endPosition; |
| } |
| } |
| |
| public void placeStart() { |
| int startPosition = this.codeStream.position; |
| if (this.count > 0 && this.ranges[this.count-1] == startPosition) { // start == previous end ? |
| // reopen current handler |
| this.count--; |
| return; |
| } |
| // only need to grow on even additions (i.e. placeStart only) |
| int length; |
| if (this.count == (length = this.ranges.length)) { |
| System.arraycopy(this.ranges, 0, this.ranges = new int[length*2], 0, length); |
| } |
| this.ranges[this.count++] = startPosition; |
| } |
| @Override |
| public String toString() { |
| String basic = getClass().getName(); |
| basic = basic.substring(basic.lastIndexOf('.')+1); |
| StringBuffer buffer = new StringBuffer(basic); |
| buffer.append('@').append(Integer.toHexString(hashCode())); |
| buffer.append("(type=").append(this.exceptionType == null ? CharOperation.NO_CHAR : this.exceptionType.readableName()); //$NON-NLS-1$ |
| buffer.append(", position=").append(this.position); //$NON-NLS-1$ |
| buffer.append(", ranges = "); //$NON-NLS-1$ |
| if (this.count == 0) { |
| buffer.append("[]"); //$NON-NLS-1$ |
| } else { |
| for (int i = 0; i < this.count; i++) { |
| if ((i & 1) == 0) { |
| buffer.append("[").append(this.ranges[i]); //$NON-NLS-1$ |
| } else { |
| buffer.append(",").append(this.ranges[i]).append("]"); //$NON-NLS-1$ //$NON-NLS-2$ |
| } |
| } |
| if ((this.count & 1) == 1) { |
| buffer.append(",?]"); //$NON-NLS-1$ |
| } |
| } |
| buffer.append(')'); |
| return buffer.toString(); |
| } |
| } |