* Copyright (c) 2017, Oracle and/or its affiliates. All rights reserved.

import java.io.DataInput;

import java.io.DataOutputStream;

import java.io.IOException;

import com.sun.org.apache.bcel.internal.Const;

 * @version $Id: CodeException.java 1749603 2016-06-21 20:50:19Z ggregory $

public final class CodeException implements Cloneable, Node {

    private int start_pc; // Range in the code the exception handler is

    private int end_pc; // active. start_pc is inclusive, end_pc exclusive

    private int handler_pc; /* Starting address of exception handler, i.e.,

     * an offset from start of code.

     */

    private int catch_type; /* If this is zero the handler catches any

     * exception, otherwise it points to the

     * exception class which is to be caught.

     */

    /**

     * Initialize from another object.

     */

    public CodeException(final CodeException c) {

        this(c.getStartPC(), c.getEndPC(), c.getHandlerPC(), c.getCatchType());

    }

    /**

     * Construct object from file stream.

     * @param file Input stream

     * @throws IOException

     */

    CodeException(final DataInput file) throws IOException {

        this(file.readUnsignedShort(), file.readUnsignedShort(), file.readUnsignedShort(), file

                .readUnsignedShort());

    }

    /**

     * @param start_pc Range in the code the exception handler is active,

     * start_pc is inclusive while

     * @param end_pc is exclusive

     * @param handler_pc Starting address of exception handler, i.e.,

     * an offset from start of code.

     * @param catch_type If zero the handler catches any

     * exception, otherwise it points to the exception class which is

     * to be caught.

     */

    public CodeException(final int start_pc, final int end_pc, final int handler_pc, final int catch_type) {

        this.start_pc = start_pc;

        this.end_pc = end_pc;

        this.handler_pc = handler_pc;

        this.catch_type = catch_type;

    }

    /**

     * Called by objects that are traversing the nodes of the tree implicitely

     * defined by the contents of a Java class. I.e., the hierarchy of methods,

     * fields, attributes, etc. spawns a tree of objects.

     *

     * @param v Visitor object

     */

    @Override

    public void accept( final Visitor v ) {

        v.visitCodeException(this);

    }

    /**

     * Dump code exception to file stream in binary format.

     *

     * @param file Output file stream

     * @throws IOException

     */

    public final void dump( final DataOutputStream file ) throws IOException {

        file.writeShort(start_pc);

        file.writeShort(end_pc);

        file.writeShort(handler_pc);

        file.writeShort(catch_type);

    }

    /**

     * @return 0, if the handler catches any exception, otherwise it points to

     * the exception class which is to be caught.

     */

    public final int getCatchType() {

        return catch_type;

    }

    /**

     * @return Exclusive end index of the region where the handler is active.

     */

    public final int getEndPC() {

        return end_pc;

    }

    /**

     * @return Starting address of exception handler, relative to the code.

     */

    public final int getHandlerPC() {

        return handler_pc;

    }

    /**

     * @return Inclusive start index of the region where the handler is active.

     */

    public final int getStartPC() {

        return start_pc;

    }

    /**

     * @param catch_type the type of exception that is caught

     */

    public final void setCatchType( final int catch_type ) {

        this.catch_type = catch_type;

    }

    /**

     * @param end_pc end of handled block

     */

    public final void setEndPC( final int end_pc ) {

        this.end_pc = end_pc;

    }

    /**

     * @param handler_pc where the actual code is

     */

    public final void setHandlerPC( final int handler_pc ) { // TODO unused

        this.handler_pc = handler_pc;

    }

    /**

     * @param start_pc start of handled block

     */

    public final void setStartPC( final int start_pc ) { // TODO unused

        this.start_pc = start_pc;

    }

    /**

     * @return String representation.

     */

    @Override

    public final String toString() {

        return "CodeException(start_pc = " + start_pc + ", end_pc = " + end_pc + ", handler_pc = "

                + handler_pc + ", catch_type = " + catch_type + ")";

    }

    /**

     * @return String representation.

     */

    public final String toString( final ConstantPool cp, final boolean verbose ) {

        String str;

        if (catch_type == 0) {

            str = "<Any exception>(0)";

        } else {

            str = Utility.compactClassName(cp.getConstantString(catch_type, Const.CONSTANT_Class), false)

                    + (verbose ? "(" + catch_type + ")" : "");

        }

        return start_pc + "\t" + end_pc + "\t" + handler_pc + "\t" + str;

    }

    public final String toString( final ConstantPool cp ) {

        return toString(cp, true);

    }

    /**

     * @return deep copy of this object

     */

    public CodeException copy() {

        try {

            return (CodeException) clone();

        } catch (final CloneNotSupportedException e) {

            // TODO should this throw?

        }

        return null;

    }