MethodParameter.java

/*
 *  Copyright (c) 2001-2024, Jean Tessier
 *  All rights reserved.
 *
 *  Redistribution and use in source and binary forms, with or without
 *  modification, are permitted provided that the following conditions
 *  are met:
 *
 *      * Redistributions of source code must retain the above copyright
 *        notice, this list of conditions and the following disclaimer.
 *
 *      * Redistributions in binary form must reproduce the above copyright
 *        notice, this list of conditions and the following disclaimer in the
 *        documentation and/or other materials provided with the distribution.
 *
 *      * Neither the name of Jean Tessier nor the names of his contributors
 *        may be used to endorse or promote products derived from this software
 *        without specific prior written permission.
 *
 *  THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
 *  "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
 *  LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
 *  A PARTICULAR PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR
 *  CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
 *  EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
 *  PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
 *  PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
 *  LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
 *  NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
 *  SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */

package com.jeantessier.classreader.impl;

import com.jeantessier.classreader.ClassNameHelper;
import com.jeantessier.classreader.UTF8_info;
import com.jeantessier.classreader.Visitor;
import org.apache.logging.log4j.*;

import java.io.*;

public class MethodParameter implements com.jeantessier.classreader.MethodParameter {
    private static final int ACC_FINAL = 0x0010;
    private static final int ACC_SYNTHETIC = 0x1000;
    private static final int ACC_MANDATED = 0x8000;

    private final ConstantPool constantPool;

    private final int nameIndex;
    private final int accessFlags;

    public MethodParameter(ConstantPool constantPool, DataInput in) throws IOException {
        this.constantPool = constantPool;

        nameIndex = in.readUnsignedShort();
        LogManager.getLogger(getClass()).debug("Name index: {} ({})", nameIndex, getName());

        accessFlags = in.readUnsignedShort();
        LogManager.getLogger(getClass()).debug("Access flags: {}", accessFlags);
    }

    public ConstantPool getConstantPool() {
        return constantPool;
    }

    public boolean hasName() {
        return getNameIndex() != 0;
    }

    public int getNameIndex() {
        return nameIndex;
    }

    public UTF8_info getRawName() {
        return hasName() ? (UTF8_info) getConstantPool().get(getNameIndex()) : null;
    }

    public String getName() {
        return hasName() ? ClassNameHelper.convertClassName(getRawName().getValue()) : null;
    }

    public int getAccessFlags() {
        return accessFlags;
    }

    public boolean isFinal() {
        return (getAccessFlags() & ACC_FINAL) != 0;
    }

    public boolean isSynthetic() {
        return (getAccessFlags() & ACC_SYNTHETIC) != 0;
    }

    public boolean isMandated() {
        return (getAccessFlags() & ACC_MANDATED) != 0;
    }

    public void accept(Visitor visitor) {
        visitor.visitMethodParameter(this);
    }
}