Method_info.java :  » Code-Analyzer » DependencyFinder » com » jeantessier » classreader » Java Open Source

/*
 *  Copyright (c) 2001-2007, 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;

import java.io.*;
import java.util.*;

public class Method_info extends Feature_info {
    public static final int ACC_SYNCHRONIZED = 0x0020;
    public static final int ACC_NATIVE       = 0x0100;
    public static final int ACC_ABSTRACT     = 0x0400;
    public static final int ACC_STRICT       = 0x0800;

    public Method_info(Classfile classfile, DataInputStream in) throws IOException {
        super(classfile, in);
    }

    public String getFeatureType() {
        return "method";
    }

    public boolean isSynchronized() {
        return (getAccessFlag() & ACC_SYNCHRONIZED) != 0;
    }

    public boolean isNative() {
        return (getAccessFlag() & ACC_NATIVE) != 0;
    }

    public boolean isAbstract() {
        return (getAccessFlag() & ACC_ABSTRACT) != 0;
    }

    public boolean isStrict() {
        return (getAccessFlag() & ACC_STRICT) != 0;
    }

    public boolean isConstructor() {
        return getName().equals("<init>");
    }

    public boolean isStaticInitializer() {
        return getName().equals("<clinit>");
    }

    public Collection getExceptions() {
        Collection result = Collections.emptyList();

        for (Attribute_info attribute : getAttributes()) {
            if (attribute instanceof Exceptions_attribute) {
                result = ((Exceptions_attribute) attribute).getExceptions();
            }
        }

        return result;
    }

    public String getSignature() {
        StringBuffer result = new StringBuffer();

        if (isConstructor()) {
            result.append(getClassfile().getSimpleName());
            result.append(SignatureHelper.getSignature(getDescriptor()));
        } else if (isStaticInitializer()) {
            result.append("static {}");
        } else {
            result.append(getName());
            result.append(SignatureHelper.getSignature(getDescriptor()));
        }

        return result.toString();
    }

    public String getReturnType() {
        return SignatureHelper.getReturnType(getDescriptor());
    }

    public String getDeclaration() {
        StringBuffer result = new StringBuffer();

        if (isPublic()) result.append("public ");
        if (isProtected()) result.append("protected ");
        if (isPrivate()) result.append("private ");
        if (isStatic()) result.append("static ");
        if (isFinal()) result.append("final ");
        if (isSynchronized()) result.append("synchronized ");
        if (isNative()) result.append("native ");
        if (isAbstract()) result.append("abstract ");

        if (!getName().equals("<init>") && !getName().equals("<clinit>")) {
            result.append((getReturnType() != null) ? getReturnType() : "void").append(" ");
        }

        result.append(getSignature());

        if (getExceptions().size() != 0) {
            result.append(" throws ");
            Iterator i = getExceptions().iterator();
            while (i.hasNext()) {
                result.append(i.next());
                if (i.hasNext()) {
                    result.append(", ");
                }
            }
        }

        return result.toString();
    }

    public Code_attribute getCode() {
        Code_attribute result = null;

        Iterator i = getAttributes().iterator();
        while (result == null && i.hasNext()) {
            Object temp = i.next();
            if (temp instanceof Code_attribute) {
                result = (Code_attribute) temp;
            }
        }

        return result;
    }

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