com.tangosol.dev.assembler.AbstractParameterAnnotationsAttribute Maven / Gradle / Ivy
/*
* Copyright (c) 2000, 2020, Oracle and/or its affiliates.
*
* Licensed under the Universal Permissive License v 1.0 as shown at
* http://oss.oracle.com/licenses/upl.
*/
package com.tangosol.dev.assembler;
import java.io.IOException;
import java.io.DataInput;
import java.io.DataOutput;
import java.util.Iterator;
import java.util.List;
import java.util.Vector;
/**
* Represents a Java Virtual Machine parameter annotations attribute
* ("RuntimeVisibleParameterAnnotations" or
* "RuntimeInvisibleParameterAnnotations")
*
*
* The parameter annotation attributes are defined by the JDK 1.5
* documentation as:
*
*
* {RuntimeVisibleParameterAnnotations | RuntimeInvisibleParameterAnnotations}_attribute
* {
* u2 attribute_name_index;
* u4 attribute_length;
* u1 num_parameters;
* {
* u2 num_annotations;
* annotation annotations[num_annotations]
* } parameter_annotations[num_parameters]
* }
*
* This method must be overridden by sub-classes which do not maintain
* the attribute as binary.
*/
protected void resetModified()
{
m_fModified = false;
}
// ----- data members ---------------------------------------------------
/**
* The parameters.
*/
private Vector m_listParameter = new Vector();
/**
* Has the attribute been modified?
*/
private boolean m_fModified;
// ----- inner classes --------------------------------------------------
/**
* Represents "Parameter" structure of the
* "RuntimeVisibleParameterAnnotations" and
* "RuntimeInvisibleParameterAnnotations" attributes.
*/
public static class Parameter extends VMStructure implements Constants
{
// ----- constructors -----------------------------------------------
/**
* Construct a Parameter object.
*/
protected Parameter()
{
}
// ----- VMStructure operations -------------------------------------
/**
* The disassembly process reads the structure from the passed
* input stream and uses the constant pool to dereference any
* constant references.
*
* @param stream the stream implementing java.io.DataInput from which
* to read the assembled VM structure
* @param pool the constant pool for the class which contains any
* constants referenced by this VM structure
*/
protected void disassemble(DataInput stream, ConstantPool pool)
throws IOException
{
int cAnnotation = stream.readUnsignedShort();
for (int i = 0; i < cAnnotation; i++)
{
Annotation annotation = new Annotation();
annotation.disassemble(stream, pool);
m_listAnnotation.addElement(annotation);
}
}
/**
* The pre-assembly step collects the necessary entries for the
* constant pool. During this step, all constants used by this
* VM structure and any sub-structures are registered with (but
* not yet bound by position in) the constant pool.
*
* @param pool the constant pool for the class which needs to be
* populated with the constants required to build this
* VM structure
*/
protected void preassemble(ConstantPool pool)
{
for (Iterator iter = m_listAnnotation.iterator();
iter.hasNext(); )
{
((Annotation) iter.next()).preassemble(pool);
}
}
/**
* The assembly process assembles and writes the structure to
* the passed output stream, resolving any dependencies using
* the passed constant pool.
*
* @param stream the stream implementing java.io.DataOutput to which to
* write the assembled VM structure
* @param pool the constant pool for the class which by this point
* contains the entire set of constants required to build
* this VM structure
*/
protected void assemble(DataOutput stream, ConstantPool pool)
throws IOException
{
stream.writeShort(m_listAnnotation.size());
for (Iterator iter = m_listAnnotation.iterator(); iter.hasNext(); )
{
((Annotation) iter.next()).assemble(stream, pool);
}
}
// ----- Object operations ------------------------------------------
/**
* Produce a human-readable string describing the attribute.
*
* @return a string describing the attribute
*/
public String toString()
{
StringBuffer sb = new StringBuffer();
sb.append(" ").append("Parameter");
sb.append("\n {");
for(Iterator iter = getAnnotations(); iter.hasNext(); )
{
sb.append("\n ").append(iter.next());
}
sb.append("\n }");
return sb.toString();
}
// ----- accessors --------------------------------------------------
/**
* Get an Iterator of the annotations in this parameter.
*
* @return the annotations
*/
public Iterator getAnnotations()
{
return m_listAnnotation.iterator();
}
/**
* Add an annotation to this parameter.
*
* @param annotation the annotation
*/
public void addAnnotation(Annotation annotation)
{
m_listAnnotation.addElement(annotation);
m_fModified = true;
}
/**
* Clear the annotations in this parameter.
*/
public void clearAnnotations()
{
m_listAnnotation.clear();
m_fModified = true;
}
/**
* Determine if the parameter has been modified.
*
* @return true if the parameter has been modified
*/
public boolean isModified()
{
for (Iterator iter = m_listAnnotation.iterator(); iter.hasNext(); )
{
if (((Annotation) iter.next()).isModified())
{
return true;
}
}
return m_fModified;
}
/**
* Reset the modified state of the VM structure.
*
* This method must be overridden by sub-classes which do not maintain
* the attribute as binary.
*/
protected void resetModified()
{
m_fModified = false;
}
/**
* Get the assembled size in bytes of this parameter structure.
*/
protected int getSize()
{
int cBytes = 2; /* num_annotations */
for (Iterator iter = m_listAnnotation.iterator(); iter.hasNext(); )
{
cBytes += ((Annotation) iter.next()).getSize();
}
return cBytes;
}
// ----- data members -----------------------------------------------
/**
* The annotations.
*/
private Vector m_listAnnotation = new Vector();
/**
* Has the attribute been modified?
*/
private boolean m_fModified;
}
}