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/*******************************************************************************
* Copyright (c) 2000, 2018 IBM Corporation and others.
* All rights reserved. This program and the accompanying materials
* are made available under the terms of the Eclipse Public License v1.0
* which accompanies this distribution, and is available at
* http://www.eclipse.org/legal/epl-v10.html
*
* This is an implementation of an early-draft specification developed under the Java
* Community Process (JCP) and is made available for testing and evaluation purposes
* only. The code is not compatible with any specification of the JCP.
*
* Contributors:
* IBM Corporation - initial API and implementation
*******************************************************************************/
package org.eclipse.jdt.core.util;
/**
* Description of a constant pool entry as described in the JVM specifications.
* Its contents is initialized according to its kind.
*
* This interface may be implemented by clients. Because of that questionable choice,
* clients may have to cast to {@link IConstantPoolEntry3} to get access to the relevant content.
*
* @see IConstantPoolEntry2
* @see IConstantPoolEntry3
* @since 2.0
*/
public interface IConstantPoolEntry {
/**
* Returns the type of this entry.
*
* @return the type of this entry
*/
int getKind();
/**
* Returns the name index for a CONSTANT_Class type entry.
* The value is unspecified otherwise.
*
* @return the name index for a CONSTANT_Class type entry
* @see IConstantPoolConstant#CONSTANT_Class
*/
int getClassInfoNameIndex();
/**
* Returns the class index for a CONSTANT_Fieldref,
* CONSTANT_Methodref, CONSTANT_InterfaceMethodref type entry.
* The value is unspecified otherwise.
*
* @return the class index for a CONSTANT_Fieldref,
* CONSTANT_Methodref, CONSTANT_InterfaceMethodref type entry
* @see IConstantPoolConstant#CONSTANT_Fieldref
* @see IConstantPoolConstant#CONSTANT_Methodref
* @see IConstantPoolConstant#CONSTANT_InterfaceMethodref
*/
int getClassIndex();
/**
* Returns the nameAndType index for a CONSTANT_Fieldref,
* CONSTANT_Methodref, CONSTANT_InterfaceMethodref,
* CONSTANT_InvokeDynamic type entry.
* The value is unspecified otherwise.
*
* @return the nameAndType index for a CONSTANT_Fieldref,
* CONSTANT_Methodref, CONSTANT_InterfaceMethodref,
* CONSTANT_InvokeDynamic type entry
* @see IConstantPoolConstant#CONSTANT_Fieldref
* @see IConstantPoolConstant#CONSTANT_Methodref
* @see IConstantPoolConstant#CONSTANT_InterfaceMethodref
* @see IConstantPoolConstant#CONSTANT_InvokeDynamic
* @see IConstantPoolConstant#CONSTANT_Dynamic
*/
int getNameAndTypeIndex();
/**
* Returns the string index for a CONSTANT_String type entry.
* The value is unspecified otherwise.
*
* @return the string index for a CONSTANT_String type entry
* @see IConstantPoolConstant#CONSTANT_String
*/
int getStringIndex();
/**
* Returns the string value for a CONSTANT_String type entry.
* Returns null otherwise.
*
* @return the string value for a CONSTANT_String type entry
* @see IConstantPoolConstant#CONSTANT_String
*/
String getStringValue();
/**
* Returns the integer value for a CONSTANT_Integer type entry.
* The value is unspecified otherwise.
*
* @return the integer value for a CONSTANT_Integer type entry
* @see IConstantPoolConstant#CONSTANT_Integer
*/
int getIntegerValue();
/**
* Returns the float value for a CONSTANT_Float type entry.
* The value is unspecified otherwise.
*
* @return the float value for a CONSTANT_Float type entry
* @see IConstantPoolConstant#CONSTANT_Float
*/
float getFloatValue();
/**
* Returns the double value for a CONSTANT_Double type entry.
* The value is unspecified otherwise.
*
* @return the double value for a CONSTANT_Double type entry
* @see IConstantPoolConstant#CONSTANT_Double
*/
double getDoubleValue();
/**
* Returns the long value for a CONSTANT_Long type entry.
* The value is unspecified otherwise.
*
* @return the long value for a CONSTANT_Long type entry
* @see IConstantPoolConstant#CONSTANT_Long
*/
long getLongValue();
/**
* Returns the descriptor index for a CONSTANT_NameAndType type entry.
* The value is unspecified otherwise.
*
* @return the descriptor index for a CONSTANT_NameAndType type entry
* @see IConstantPoolConstant#CONSTANT_NameAndType
*/
int getNameAndTypeInfoDescriptorIndex();
/**
* Returns the name index for a CONSTANT_NameAndType type entry.
* The value is unspecified otherwise.
*
* @return the name index for a CONSTANT_NameAndType type entry
* @see IConstantPoolConstant#CONSTANT_NameAndType
*/
int getNameAndTypeInfoNameIndex();
/**
* Returns the class name for a CONSTANT_Class type entry.
* Returns null otherwise.
*
* @return the class name for a CONSTANT_Class type entry
* @see IConstantPoolConstant#CONSTANT_Class
*/
char[] getClassInfoName();
/**
* Returns the class name for a CONSTANT_Fieldref,
* CONSTANT_Methodref, CONSTANT_InterfaceMethodref type entry.
* Returns null otherwise.
*
* @return the class name for a CONSTANT_Fieldref,
* CONSTANT_Methodref, CONSTANT_InterfaceMethodref type entry
* @see IConstantPoolConstant#CONSTANT_Fieldref
* @see IConstantPoolConstant#CONSTANT_Methodref
* @see IConstantPoolConstant#CONSTANT_InterfaceMethodref
*/
char[] getClassName();
/**
* Returns the field name for a CONSTANT_Fieldref type entry.
* Returns null otherwise.
*
* @return the field name for a CONSTANT_Fieldref type entry
* @see IConstantPoolConstant#CONSTANT_Fieldref
*/
char[] getFieldName();
/**
* Returns the method name for a CONSTANT_Methodref, CONSTANT_InterfaceMethodref
* or CONSTANT_InvokeDynamic type entry.
* Returns null otherwise.
*
* @return the method name for a CONSTANT_Methodref, CONSTANT_InterfaceMethodref
* or CONSTANT_InvokeDynamic type entry
* @see IConstantPoolConstant#CONSTANT_Methodref
* @see IConstantPoolConstant#CONSTANT_InterfaceMethodref
* @see IConstantPoolConstant#CONSTANT_InvokeDynamic
* @see IConstantPoolConstant#CONSTANT_Dynamic
*/
char[] getMethodName();
/**
* Returns the field descriptor value for a CONSTANT_Fieldref type entry. This value
* is set only when decoding the CONSTANT_Fieldref entry.
* Returns null otherwise.
*
* @return the field descriptor value for a CONSTANT_Fieldref type entry. This value
* is set only when decoding the CONSTANT_Fieldref entry
* @see IConstantPoolConstant#CONSTANT_Fieldref
*/
char[] getFieldDescriptor();
/**
* Returns the method descriptor value for a CONSTANT_Methodref or
* CONSTANT_InterfaceMethodref type entry. This value is set only when decoding the
* CONSTANT_Methodref, CONSTANT_InterfaceMethodref, CONSTANT_MethodType
* or CONSTANT_InvokeDynamic entry.
*
* Returns null otherwise.
*
* @return the method descriptor value for a CONSTANT_Methodref,
* CONSTANT_InterfaceMethodref type entry. This value is set only when decoding the
* CONSTANT_Methodref, CONSTANT_InterfaceMethodref, CONSTANT_MethodType
* or CONSTANT_InvokeDynamic entry
*
* @see IConstantPoolConstant#CONSTANT_Methodref
* @see IConstantPoolConstant#CONSTANT_InterfaceMethodref
* @see IConstantPoolConstant#CONSTANT_MethodType
* @see IConstantPoolConstant#CONSTANT_InvokeDynamic
* @see IConstantPoolConstant#CONSTANT_Dynamic
*/
char[] getMethodDescriptor();
/**
* Returns the utf8 value for a CONSTANT_Utf8 type entry. This value is set only when
* decoding a UTF8 entry.
* Returns null otherwise.
*
* @return the utf8 value for a CONSTANT_Utf8 type entry. This value is set only when
* decoding a UTF8 entry
* @see IConstantPoolConstant#CONSTANT_Utf8
*/
char[] getUtf8Value();
/**
* Returns the utf8 length for a CONSTANT_Utf8 type entry. This value is set only when
* decoding a UTF8 entry.
* Returns null otherwise.
*
* @return the utf8 length for a CONSTANT_Utf8 type entry. This value is set only when
* decoding a UTF8 entry
* @see IConstantPoolConstant#CONSTANT_Utf8
*/
int getUtf8Length();
}
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