/*
 * 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.constant;

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

This class is responsible for loading any double constant onto the operand stack.
/** * This class is responsible for loading any {@code double} constant onto the operand stack. */
public enum DoubleConstant implements StackManipulation {
A double constant of value 0.0.
/** * A {@code double} constant of value {@code 0.0}. */
ZERO(Opcodes.DCONST_0),
A double constant of value 1.0.
/** * A {@code double} constant of value {@code 1.0}. */
ONE(Opcodes.DCONST_1);
The size impact of loading a double constant onto the operand stack.
/** * The size impact of loading a {@code double} constant onto the operand stack. */
private static final StackManipulation.Size SIZE = StackSize.DOUBLE.toIncreasingSize();
The shortcut opcode for loading a double constant.
/** * The shortcut opcode for loading a {@code double} constant. */
private final int opcode;
Creates a new shortcut operation for loading a common double onto the operand stack.
Params:
  • opcode – The shortcut opcode for loading a double constant.
/** * Creates a new shortcut operation for loading a common {@code double} onto the operand stack. * * @param opcode The shortcut opcode for loading a {@code double} constant. */
DoubleConstant(int opcode) { this.opcode = opcode; }
Creates a stack manipulation for loading a double value onto the operand stack.

 

This is achieved either by invoking a specific opcode, if any, or by creating a constant pool entry.
Params:
  • value – The double value to load onto the stack.
Returns:A stack manipulation for loading the given double value.
/** * Creates a stack manipulation for loading a {@code double} value onto the operand stack. * <p>&nbsp;</p> * This is achieved either by invoking a specific opcode, if any, or by creating a constant pool entry. * * @param value The {@code double} value to load onto the stack. * @return A stack manipulation for loading the given {@code double} value. */
public static StackManipulation forValue(double value) { if (value == 0d) { return ZERO; } else if (value == 1d) { return ONE; } else { return new ConstantPool(value); } }
{@inheritDoc}
/** * {@inheritDoc} */
public boolean isValid() { return true; }
{@inheritDoc}
/** * {@inheritDoc} */
public StackManipulation.Size apply(MethodVisitor methodVisitor, Implementation.Context implementationContext) { methodVisitor.visitInsn(opcode); return SIZE; }
A stack manipulation for loading a double value from a class's constant pool onto the operand stack.
/** * A stack manipulation for loading a {@code double} value from a class's constant pool onto the operand stack. */
@HashCodeAndEqualsPlugin.Enhance protected static class ConstantPool implements StackManipulation {
The double value to be loaded onto the operand stack.
/** * The {@code double} value to be loaded onto the operand stack. */
private final double value;
Creates a new constant pool load operation.
Params:
  • value – The double value to be loaded onto the operand stack.
/** * Creates a new constant pool load operation. * * @param value The {@code double} value to be loaded onto the operand stack. */
protected ConstantPool(double value) { this.value = value; }
{@inheritDoc}
/** * {@inheritDoc} */
public boolean isValid() { return true; }
{@inheritDoc}
/** * {@inheritDoc} */
public Size apply(MethodVisitor methodVisitor, Implementation.Context implementationContext) { methodVisitor.visitLdcInsn(value); return SIZE; } } }