/*
 * Copyright 2014 - 2020 Rafael Winterhalter
 *
 * 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 net.bytebuddy.implementation.bytecode.assign;

import net.bytebuddy.build.HashCodeAndEqualsPlugin;
import net.bytebuddy.description.type.TypeDescription;
import net.bytebuddy.implementation.Implementation;
import net.bytebuddy.implementation.bytecode.StackManipulation;
import org.objectweb.asm.MethodVisitor;
import org.objectweb.asm.Opcodes;

Implements an instanceof check.
/** * Implements an {@code instanceof} check. */
@HashCodeAndEqualsPlugin.Enhance public class InstanceCheck implements StackManipulation {
The type to apply the instance check against.
/** * The type to apply the instance check against. */
private final TypeDescription typeDescription;
Creates a new instance check.
Params:
  • typeDescription – The type to apply the instance check against.
/** * Creates a new instance check. * * @param typeDescription The type to apply the instance check against. */
protected InstanceCheck(TypeDescription typeDescription) { this.typeDescription = typeDescription; }
Creates a new instance check.
Params:
  • typeDescription – The type to apply the instance check against.
Returns:An appropriate stack manipulation.
/** * Creates a new instance check. * * @param typeDescription The type to apply the instance check against. * @return An appropriate stack manipulation. */
public static StackManipulation of(TypeDescription typeDescription) { if (typeDescription.isPrimitive()) { throw new IllegalArgumentException("Cannot check an instance against a primitive type: " + typeDescription); } return new InstanceCheck(typeDescription); }
{@inheritDoc}
/** * {@inheritDoc} */
public boolean isValid() { return true; }
{@inheritDoc}
/** * {@inheritDoc} */
public Size apply(MethodVisitor methodVisitor, Implementation.Context implementationContext) { methodVisitor.visitTypeInsn(Opcodes.INSTANCEOF, typeDescription.getInternalName()); return new Size(0, 0); } }