com.github.drinkjava2.asm.AnnotationVisitor Maven / Gradle / Ivy
Go to download
Show more of this group Show more artifacts with this name
Show all versions of jsqlbox Show documentation
Show all versions of jsqlbox Show documentation
jSqlBox is a full function DAO tool
// ASM: a very small and fast Java bytecode manipulation framework
// Copyright (c) 2000-2011 INRIA, France Telecom
// All rights reserved.
//
// Redistribution and use in source and binary forms, with or without
// modification, are permitted provided that the following conditions
// are met:
// 1. Redistributions of source code must retain the above copyright
// notice, this list of conditions and the following disclaimer.
// 2. 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.
// 3. Neither the name of the copyright holders nor the names of its
// 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 COPYRIGHT OWNER 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.github.drinkjava2.asm;
/**
* A visitor to visit a Java annotation. The methods of this class must be called in the following
* order: ( {@code visit} | {@code visitEnum} | {@code visitAnnotation} | {@code visitArray} )*
* {@code visitEnd}.
*
* @author Eric Bruneton
* @author Eugene Kuleshov
*/
public abstract class AnnotationVisitor {
/**
* The ASM API version implemented by this visitor. The value of this field must be one of {@link
* Opcodes#ASM4}, {@link Opcodes#ASM5}, {@link Opcodes#ASM6} or {@link Opcodes#ASM7}.
*/
protected final int api;
/**
* The annotation visitor to which this visitor must delegate method calls. May be {@literal
* null}.
*/
protected AnnotationVisitor av;
/**
* Constructs a new {@link AnnotationVisitor}.
*
* @param api the ASM API version implemented by this visitor. Must be one of {@link
* Opcodes#ASM4}, {@link Opcodes#ASM5}, {@link Opcodes#ASM6} or {@link Opcodes#ASM7}.
*/
public AnnotationVisitor(final int api) {
this(api, null);
}
/**
* Constructs a new {@link AnnotationVisitor}.
*
* @param api the ASM API version implemented by this visitor. Must be one of {@link
* Opcodes#ASM4}, {@link Opcodes#ASM5}, {@link Opcodes#ASM6} or {@link Opcodes#ASM7}.
* @param annotationVisitor the annotation visitor to which this visitor must delegate method
* calls. May be {@literal null}.
*/
public AnnotationVisitor(final int api, final AnnotationVisitor annotationVisitor) {
if (api != Opcodes.ASM7 && api != Opcodes.ASM6 && api != Opcodes.ASM5 && api != Opcodes.ASM4) {
throw new IllegalArgumentException("Unsupported api " + api);
}
this.api = api;
this.av = annotationVisitor;
}
/**
* Visits a primitive value of the annotation.
*
* @param name the value name.
* @param value the actual value, whose type must be {@link Byte}, {@link Boolean}, {@link
* Character}, {@link Short}, {@link Integer} , {@link Long}, {@link Float}, {@link Double},
* {@link String} or {@link Type} of {@link Type#OBJECT} or {@link Type#ARRAY} sort. This
* value can also be an array of byte, boolean, short, char, int, long, float or double values
* (this is equivalent to using {@link #visitArray} and visiting each array element in turn,
* but is more convenient).
*/
public void visit(final String name, final Object value) {
if (av != null) {
av.visit(name, value);
}
}
/**
* Visits an enumeration value of the annotation.
*
* @param name the value name.
* @param descriptor the class descriptor of the enumeration class.
* @param value the actual enumeration value.
*/
public void visitEnum(final String name, final String descriptor, final String value) {
if (av != null) {
av.visitEnum(name, descriptor, value);
}
}
/**
* Visits a nested annotation value of the annotation.
*
* @param name the value name.
* @param descriptor the class descriptor of the nested annotation class.
* @return a visitor to visit the actual nested annotation value, or {@literal null} if this
* visitor is not interested in visiting this nested annotation. The nested annotation
* value must be fully visited before calling other methods on this annotation visitor.
*/
public AnnotationVisitor visitAnnotation(final String name, final String descriptor) {
if (av != null) {
return av.visitAnnotation(name, descriptor);
}
return null;
}
/**
* Visits an array value of the annotation. Note that arrays of primitive types (such as byte,
* boolean, short, char, int, long, float or double) can be passed as value to {@link #visit
* visit}. This is what {@link ClassReader} does.
*
* @param name the value name.
* @return a visitor to visit the actual array value elements, or {@literal null} if this visitor
* is not interested in visiting these values. The 'name' parameters passed to the methods of
* this visitor are ignored. All the array values must be visited before calling other
* methods on this annotation visitor.
*/
public AnnotationVisitor visitArray(final String name) {
if (av != null) {
return av.visitArray(name);
}
return null;
}
/** Visits the end of the annotation. */
public void visitEnd() {
if (av != null) {
av.visitEnd();
}
}
}