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/***
* ASM: a very small and fast Java bytecode manipulation framework
* Copyright (c) 2000-2013 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 org.springframework.asm;
/**
* A reference to a type appearing in a class, field or method declaration, or
* on an instruction. Such a reference designates the part of the class where
* the referenced type is appearing (e.g. an 'extends', 'implements' or 'throws'
* clause, a 'new' instruction, a 'catch' clause, a type cast, a local variable
* declaration, etc).
*
* @author Eric Bruneton
*/
public class TypeReference {
/**
* The sort of type references that target a type parameter of a generic
* class. See {@link #getSort getSort}.
*/
public final static int CLASS_TYPE_PARAMETER = 0x00;
/**
* The sort of type references that target a type parameter of a generic
* method. See {@link #getSort getSort}.
*/
public final static int METHOD_TYPE_PARAMETER = 0x01;
/**
* The sort of type references that target the super class of a class or one
* of the interfaces it implements. See {@link #getSort getSort}.
*/
public final static int CLASS_EXTENDS = 0x10;
/**
* The sort of type references that target a bound of a type parameter of a
* generic class. See {@link #getSort getSort}.
*/
public final static int CLASS_TYPE_PARAMETER_BOUND = 0x11;
/**
* The sort of type references that target a bound of a type parameter of a
* generic method. See {@link #getSort getSort}.
*/
public final static int METHOD_TYPE_PARAMETER_BOUND = 0x12;
/**
* The sort of type references that target the type of a field. See
* {@link #getSort getSort}.
*/
public final static int FIELD = 0x13;
/**
* The sort of type references that target the return type of a method. See
* {@link #getSort getSort}.
*/
public final static int METHOD_RETURN = 0x14;
/**
* The sort of type references that target the receiver type of a method.
* See {@link #getSort getSort}.
*/
public final static int METHOD_RECEIVER = 0x15;
/**
* The sort of type references that target the type of a formal parameter of
* a method. See {@link #getSort getSort}.
*/
public final static int METHOD_FORMAL_PARAMETER = 0x16;
/**
* The sort of type references that target the type of an exception declared
* in the throws clause of a method. See {@link #getSort getSort}.
*/
public final static int THROWS = 0x17;
/**
* The sort of type references that target the type of a local variable in a
* method. See {@link #getSort getSort}.
*/
public final static int LOCAL_VARIABLE = 0x40;
/**
* The sort of type references that target the type of a resource variable
* in a method. See {@link #getSort getSort}.
*/
public final static int RESOURCE_VARIABLE = 0x41;
/**
* The sort of type references that target the type of the exception of a
* 'catch' clause in a method. See {@link #getSort getSort}.
*/
public final static int EXCEPTION_PARAMETER = 0x42;
/**
* The sort of type references that target the type declared in an
* 'instanceof' instruction. See {@link #getSort getSort}.
*/
public final static int INSTANCEOF = 0x43;
/**
* The sort of type references that target the type of the object created by
* a 'new' instruction. See {@link #getSort getSort}.
*/
public final static int NEW = 0x44;
/**
* The sort of type references that target the receiver type of a
* constructor reference. See {@link #getSort getSort}.
*/
public final static int CONSTRUCTOR_REFERENCE = 0x45;
/**
* The sort of type references that target the receiver type of a method
* reference. See {@link #getSort getSort}.
*/
public final static int METHOD_REFERENCE = 0x46;
/**
* The sort of type references that target the type declared in an explicit
* or implicit cast instruction. See {@link #getSort getSort}.
*/
public final static int CAST = 0x47;
/**
* The sort of type references that target a type parameter of a generic
* constructor in a constructor call. See {@link #getSort getSort}.
*/
public final static int CONSTRUCTOR_INVOCATION_TYPE_ARGUMENT = 0x48;
/**
* The sort of type references that target a type parameter of a generic
* method in a method call. See {@link #getSort getSort}.
*/
public final static int METHOD_INVOCATION_TYPE_ARGUMENT = 0x49;
/**
* The sort of type references that target a type parameter of a generic
* constructor in a constructor reference. See {@link #getSort getSort}.
*/
public final static int CONSTRUCTOR_REFERENCE_TYPE_ARGUMENT = 0x4A;
/**
* The sort of type references that target a type parameter of a generic
* method in a method reference. See {@link #getSort getSort}.
*/
public final static int METHOD_REFERENCE_TYPE_ARGUMENT = 0x4B;
/**
* The type reference value in Java class file format.
*/
private int value;
/**
* Creates a new TypeReference.
*
* @param typeRef
* the int encoded value of the type reference, as received in a
* visit method related to type annotations, like
* visitTypeAnnotation.
*/
public TypeReference(int typeRef) {
this.value = typeRef;
}
/**
* Returns a type reference of the given sort.
*
* @param sort
* {@link #FIELD FIELD}, {@link #METHOD_RETURN METHOD_RETURN},
* {@link #METHOD_RECEIVER METHOD_RECEIVER},
* {@link #LOCAL_VARIABLE LOCAL_VARIABLE},
* {@link #RESOURCE_VARIABLE RESOURCE_VARIABLE},
* {@link #INSTANCEOF INSTANCEOF}, {@link #NEW NEW},
* {@link #CONSTRUCTOR_REFERENCE CONSTRUCTOR_REFERENCE}, or
* {@link #METHOD_REFERENCE METHOD_REFERENCE}.
* @return a type reference of the given sort.
*/
public static TypeReference newTypeReference(int sort) {
return new TypeReference(sort << 24);
}
/**
* Returns a reference to a type parameter of a generic class or method.
*
* @param sort
* {@link #CLASS_TYPE_PARAMETER CLASS_TYPE_PARAMETER} or
* {@link #METHOD_TYPE_PARAMETER METHOD_TYPE_PARAMETER}.
* @param paramIndex
* the type parameter index.
* @return a reference to the given generic class or method type parameter.
*/
public static TypeReference newTypeParameterReference(int sort,
int paramIndex) {
return new TypeReference((sort << 24) | (paramIndex << 16));
}
/**
* Returns a reference to a type parameter bound of a generic class or
* method.
*
* @param sort
* {@link #CLASS_TYPE_PARAMETER CLASS_TYPE_PARAMETER} or
* {@link #METHOD_TYPE_PARAMETER METHOD_TYPE_PARAMETER}.
* @param paramIndex
* the type parameter index.
* @param boundIndex
* the type bound index within the above type parameters.
* @return a reference to the given generic class or method type parameter
* bound.
*/
public static TypeReference newTypeParameterBoundReference(int sort,
int paramIndex, int boundIndex) {
return new TypeReference((sort << 24) | (paramIndex << 16)
| (boundIndex << 8));
}
/**
* Returns a reference to the super class or to an interface of the
* 'implements' clause of a class.
*
* @param itfIndex
* the index of an interface in the 'implements' clause of a
* class, or -1 to reference the super class of the class.
* @return a reference to the given super type of a class.
*/
public static TypeReference newSuperTypeReference(int itfIndex) {
itfIndex &= 0xFFFF;
return new TypeReference((CLASS_EXTENDS << 24) | (itfIndex << 8));
}
/**
* Returns a reference to the type of a formal parameter of a method.
*
* @param paramIndex
* the formal parameter index.
*
* @return a reference to the type of the given method formal parameter.
*/
public static TypeReference newFormalParameterReference(int paramIndex) {
return new TypeReference((METHOD_FORMAL_PARAMETER << 24)
| (paramIndex << 16));
}
/**
* Returns a reference to the type of an exception, in a 'throws' clause of
* a method.
*
* @param exceptionIndex
* the index of an exception in a 'throws' clause of a method.
*
* @return a reference to the type of the given exception.
*/
public static TypeReference newExceptionReference(int exceptionIndex) {
return new TypeReference((THROWS << 24) | (exceptionIndex << 8));
}
/**
* Returns a reference to the type of the exception declared in a 'catch'
* clause of a method.
*
* @param tryCatchBlockIndex
* the index of a try catch block (using the order in which they
* are visited with visitTryCatchBlock).
*
* @return a reference to the type of the given exception.
*/
public static TypeReference newTryCatchReference(int tryCatchBlockIndex) {
return new TypeReference((EXCEPTION_PARAMETER << 24)
| (tryCatchBlockIndex << 8));
}
/**
* Returns a reference to the type of a type argument in a constructor or
* method call or reference.
*
* @param sort
* {@link #CAST CAST},
* {@link #CONSTRUCTOR_INVOCATION_TYPE_ARGUMENT
* CONSTRUCTOR_INVOCATION_TYPE_ARGUMENT},
* {@link #METHOD_INVOCATION_TYPE_ARGUMENT
* METHOD_INVOCATION_TYPE_ARGUMENT},
* {@link #CONSTRUCTOR_REFERENCE_TYPE_ARGUMENT
* CONSTRUCTOR_REFERENCE_TYPE_ARGUMENT}, or
* {@link #METHOD_REFERENCE_TYPE_ARGUMENT
* METHOD_REFERENCE_TYPE_ARGUMENT}.
* @param argIndex
* the type argument index.
*
* @return a reference to the type of the given type argument.
*/
public static TypeReference newTypeArgumentReference(int sort, int argIndex) {
return new TypeReference((sort << 24) | argIndex);
}
/**
* Returns the sort of this type reference.
*
* @return {@link #CLASS_TYPE_PARAMETER CLASS_TYPE_PARAMETER},
* {@link #METHOD_TYPE_PARAMETER METHOD_TYPE_PARAMETER},
* {@link #CLASS_EXTENDS CLASS_EXTENDS},
* {@link #CLASS_TYPE_PARAMETER_BOUND CLASS_TYPE_PARAMETER_BOUND},
* {@link #METHOD_TYPE_PARAMETER_BOUND METHOD_TYPE_PARAMETER_BOUND},
* {@link #FIELD FIELD}, {@link #METHOD_RETURN METHOD_RETURN},
* {@link #METHOD_RECEIVER METHOD_RECEIVER},
* {@link #METHOD_FORMAL_PARAMETER METHOD_FORMAL_PARAMETER},
* {@link #THROWS THROWS}, {@link #LOCAL_VARIABLE LOCAL_VARIABLE},
* {@link #RESOURCE_VARIABLE RESOURCE_VARIABLE},
* {@link #EXCEPTION_PARAMETER EXCEPTION_PARAMETER},
* {@link #INSTANCEOF INSTANCEOF}, {@link #NEW NEW},
* {@link #CONSTRUCTOR_REFERENCE CONSTRUCTOR_REFERENCE},
* {@link #METHOD_REFERENCE METHOD_REFERENCE}, {@link #CAST CAST},
* {@link #CONSTRUCTOR_INVOCATION_TYPE_ARGUMENT
* CONSTRUCTOR_INVOCATION_TYPE_ARGUMENT},
* {@link #METHOD_INVOCATION_TYPE_ARGUMENT
* METHOD_INVOCATION_TYPE_ARGUMENT},
* {@link #CONSTRUCTOR_REFERENCE_TYPE_ARGUMENT
* CONSTRUCTOR_REFERENCE_TYPE_ARGUMENT}, or
* {@link #METHOD_REFERENCE_TYPE_ARGUMENT
* METHOD_REFERENCE_TYPE_ARGUMENT}.
*/
public int getSort() {
return value >>> 24;
}
/**
* Returns the index of the type parameter referenced by this type
* reference. This method must only be used for type references whose sort
* is {@link #CLASS_TYPE_PARAMETER CLASS_TYPE_PARAMETER},
* {@link #METHOD_TYPE_PARAMETER METHOD_TYPE_PARAMETER},
* {@link #CLASS_TYPE_PARAMETER_BOUND CLASS_TYPE_PARAMETER_BOUND} or
* {@link #METHOD_TYPE_PARAMETER_BOUND METHOD_TYPE_PARAMETER_BOUND}.
*
* @return a type parameter index.
*/
public int getTypeParameterIndex() {
return (value & 0x00FF0000) >> 16;
}
/**
* Returns the index of the type parameter bound, within the type parameter
* {@link #getTypeParameterIndex}, referenced by this type reference. This
* method must only be used for type references whose sort is
* {@link #CLASS_TYPE_PARAMETER_BOUND CLASS_TYPE_PARAMETER_BOUND} or
* {@link #METHOD_TYPE_PARAMETER_BOUND METHOD_TYPE_PARAMETER_BOUND}.
*
* @return a type parameter bound index.
*/
public int getTypeParameterBoundIndex() {
return (value & 0x0000FF00) >> 8;
}
/**
* Returns the index of the "super type" of a class that is referenced by
* this type reference. This method must only be used for type references
* whose sort is {@link #CLASS_EXTENDS CLASS_EXTENDS}.
*
* @return the index of an interface in the 'implements' clause of a class,
* or -1 if this type reference references the type of the super
* class.
*/
public int getSuperTypeIndex() {
return (short) ((value & 0x00FFFF00) >> 8);
}
/**
* Returns the index of the formal parameter whose type is referenced by
* this type reference. This method must only be used for type references
* whose sort is {@link #METHOD_FORMAL_PARAMETER METHOD_FORMAL_PARAMETER}.
*
* @return a formal parameter index.
*/
public int getFormalParameterIndex() {
return (value & 0x00FF0000) >> 16;
}
/**
* Returns the index of the exception, in a 'throws' clause of a method,
* whose type is referenced by this type reference. This method must only be
* used for type references whose sort is {@link #THROWS THROWS}.
*
* @return the index of an exception in the 'throws' clause of a method.
*/
public int getExceptionIndex() {
return (value & 0x00FFFF00) >> 8;
}
/**
* Returns the index of the try catch block (using the order in which they
* are visited with visitTryCatchBlock), whose 'catch' type is referenced by
* this type reference. This method must only be used for type references
* whose sort is {@link #EXCEPTION_PARAMETER EXCEPTION_PARAMETER} .
*
* @return the index of an exception in the 'throws' clause of a method.
*/
public int getTryCatchBlockIndex() {
return (value & 0x00FFFF00) >> 8;
}
/**
* Returns the index of the type argument referenced by this type reference.
* This method must only be used for type references whose sort is
* {@link #CAST CAST}, {@link #CONSTRUCTOR_INVOCATION_TYPE_ARGUMENT
* CONSTRUCTOR_INVOCATION_TYPE_ARGUMENT},
* {@link #METHOD_INVOCATION_TYPE_ARGUMENT METHOD_INVOCATION_TYPE_ARGUMENT},
* {@link #CONSTRUCTOR_REFERENCE_TYPE_ARGUMENT
* CONSTRUCTOR_REFERENCE_TYPE_ARGUMENT}, or
* {@link #METHOD_REFERENCE_TYPE_ARGUMENT METHOD_REFERENCE_TYPE_ARGUMENT}.
*
* @return a type parameter index.
*/
public int getTypeArgumentIndex() {
return value & 0xFF;
}
/**
* Returns the int encoded value of this type reference, suitable for use in
* visit methods related to type annotations, like visitTypeAnnotation.
*
* @return the int encoded value of this type reference.
*/
public int getValue() {
return value;
}
}
