proguard.classfile.attribute.ExceptionInfo Maven / Gradle / Ivy

Go to download

Show more of this group Show more artifacts with this name
Show all versions of proguard-core Show documentation

ProGuardCORE is a free library to read, analyze, modify, and write Java class files.

There is a newer version: 9.1.6

/*
 * ProGuardCORE -- library to process Java bytecode.
 *
 * Copyright (c) 2002-2020 Guardsquare NV
 *
 * 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 proguard.classfile.attribute;

import proguard.util.SimpleProcessable;

/**
 * Representation of an exception table entry.
 *
 * @author Eric Lafortune
 */
public class ExceptionInfo extends SimpleProcessable {
  public int u2startPC;
  public int u2endPC;
  public int u2handlerPC;
  public int u2catchType;

  /** Creates an uninitialized ExceptionInfo. */
  public ExceptionInfo() {
    this(0, 0, 0, 0);
  }

  /** Creates an ExceptionInfo with the given properties. */
  public ExceptionInfo(int u2startPC, int u2endPC, int u2handlerPC, int u2catchType) {
    this.u2startPC = u2startPC;
    this.u2endPC = u2endPC;
    this.u2handlerPC = u2handlerPC;
    this.u2catchType = u2catchType;
  }

  /** Returns whether the exception's try block contains the instruction at the given offset. */
  public boolean isApplicable(int instructionOffset) {
    return instructionOffset >= u2startPC && instructionOffset < u2endPC;
  }

  /**
   * Returns whether the exception's try block overlaps with the specified block of instructions.
   */
  public boolean isApplicable(int startOffset, int endOffset) {
    return u2startPC < endOffset && u2endPC > startOffset;
  }
}