br.ufpr.gres.core.MethodInfo.java Source code

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Here is the source code for br.ufpr.gres.core.MethodInfo.java

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/*
 * Copyright 2016 Jackson Antonio do Prado Lima <jacksonpradolima at gmail.com>.
 *
 * 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 br.ufpr.gres.core;

import br.ufpr.gres.ClassInfo;
import org.objectweb.asm.Opcodes;
import org.objectweb.asm.Type;

/**
 *
 * @author Jackson Antonio do Prado Lima <jacksonpradolima at gmail.com>
 * @version 1.0
 */
public class MethodInfo {

    private final ClassInfo owningClass;
    private final int access;
    private final String methodName;
    private final String methodDescriptor;

    public MethodInfo() {
        this(new ClassInfo(0, 0, "", "", "", new String[0]), 0, "", "()V");
    }

    private MethodInfo(final ClassInfo owningClass, final int access, final String name,
            final String methodDescriptor) {
        this.owningClass = owningClass;
        this.access = access;
        this.methodName = name;
        this.methodDescriptor = methodDescriptor;
    }

    public String getDescription() {
        return this.owningClass.getName() + "::" + getName();
    }

    public String getName() {
        return this.methodName;
    }

    public String getMethodDescriptor() {
        return this.methodDescriptor;
    }

    @Override
    public String toString() {
        return "MethodInfo [access=" + this.access + ", desc=" + this.methodDescriptor + ",  name="
                + this.methodName + "]";
    }

    public boolean isStatic() {
        return ((this.access & Opcodes.ACC_STATIC) != 0);
    }

    public boolean isSynthetic() {
        return ((this.access & Opcodes.ACC_SYNTHETIC) != 0);
    }

    public boolean isConstructor() {
        return isConstructor(this.methodName);
    }

    public static boolean isConstructor(final String methodName) {
        return "<init>".equals(methodName);
    }

    public Type getReturnType() {
        return Type.getReturnType(this.methodDescriptor);
    }

    public static boolean isVoid(final String desc) {
        return Type.getReturnType(desc).equals(Type.VOID_TYPE);
    }

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

    public boolean isVoid() {
        return isVoid(this.methodDescriptor);
    }

    public boolean takesNoParameters() {
        return this.methodDescriptor.startsWith("()");
    }

    public boolean isInGroovyClass() {
        return this.owningClass.isGroovyClass();
    }

    public boolean isGeneratedEnumMethod() {
        return this.owningClass.isEnum() && (isValuesMethod() || isValueOfMethod() || isStaticInitializer());
    }

    private boolean isValuesMethod() {
        return this.getName().equals("values") && takesNoParameters() && isStatic();
    }

    private boolean isValueOfMethod() {
        return this.getName().equals("valueOf") && this.methodDescriptor.startsWith("(Ljava/lang/String;)")
                && isStatic();
    }

    public MethodInfo withMethodDescriptor(final String newDescriptor) {
        return new MethodInfo(this.owningClass, this.access, this.methodName, newDescriptor);
    }

    public MethodInfo withAccess(final int accessModifier) {
        return new MethodInfo(this.owningClass, accessModifier, this.methodName, this.methodDescriptor);
    }

    public MethodInfo withMethodName(final String newMethodName) {
        return new MethodInfo(this.owningClass, this.access, newMethodName, this.methodDescriptor);
    }

    public MethodInfo withOwner(final ClassInfo newOwnerClass) {
        return new MethodInfo(newOwnerClass, this.access, this.methodName, this.methodDescriptor);
    }
}