org.codehaus.modello.plugin.java.javasource.JMethodSignature Maven / Gradle / Ivy
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package org.codehaus.modello.plugin.java.javasource;
/*
* Copyright (c) 2004, Codehaus.org
*
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* this software and associated documentation files (the "Software"), to deal in
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* of the Software, and to permit persons to whom the Software is furnished to do
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* The above copyright notice and this permission notice shall be included in all
* copies or substantial portions of the Software.
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* SOFTWARE.
*/
import java.util.Vector;
/**
* A class which holds information about the signature
* of a JMethod.
*
* The code in this package was modelled after the Java Reflection API
* as much as possible to reduce the learning curve.
*
* @author Keith Visco
**/
public final class JMethodSignature
{
/**
* The set of modifiers for this JMethod
**/
private JModifiers modifiers = null;
/**
* The return type of this Method
**/
private JType returnType = null;
/**
* The name of this method
**/
private String name = null;
/**
* The list of parameters of this JMethodSignature in declared
* order
**/
private JNamedMap params = null;
/**
* The JavaDoc comment for this method signature.
**/
private JDocComment jdc = null;
/**
* The exceptions that this method throws
**/
private Vector exceptions = null;
/**
* Creates a new method with the given name and return type.
* For "void" return types, simply pass in null as the returnType
*
* @param name, the method name. Must not be null.
* @param returnType the return type of the method. May be null.
**/
public JMethodSignature( String name, JType returnType )
{
if ( ( name == null ) || ( name.length() == 0 ) )
{
String err = "The method name must not be null or zero-length";
throw new IllegalArgumentException( err );
}
this.jdc = new JDocComment();
this.returnType = returnType;
this.name = name;
this.modifiers = new JModifiers();
this.params = new JNamedMap( 3 );
this.exceptions = new Vector( 1 );
} //-- JMethodSignature
/**
* Adds the given Exception to this JMethodSignature's throws clause.
*
* @param exp the JClass representing the Exception
**/
public void addException( JClass exp )
{
if ( exp == null ) return;
//-- make sure exception is not already added
String expClassName = exp.getName();
for ( int i = 0; i < exceptions.size(); i++ )
{
JClass jClass = (JClass) exceptions.elementAt( i );
if ( expClassName.equals( jClass.getName() ) ) return;
}
//-- add exception
exceptions.addElement( exp );
//-- create comment
jdc.addDescriptor( JDocDescriptor.createExceptionDesc( expClassName, null ) );
} //-- addException
/**
* Adds the given parameter to this JMethodSignature's list of
* parameters.
*
* @param parameter the parameter to add to the this Methods
* list of parameters.
* @throws java.lang.IllegalArgumentException when a parameter already
* exists for this Method with the same name as the new
* parameter.
**/
public void addParameter( JParameter parameter )
throws IllegalArgumentException
{
if ( parameter == null ) return;
String pName = parameter.getName();
//-- check current params
if ( params.get( pName ) != null )
{
StringBuffer err = new StringBuffer();
err.append( "A parameter already exists for this method, " );
err.append( name );
err.append( ", with the name: " );
err.append( pName );
throw new IllegalArgumentException( err.toString() );
}
params.put( pName, parameter );
//-- create comment
jdc.addDescriptor( JDocDescriptor.createParamDesc( pName, null ) );
} //-- addParameter
/**
* Returns the exceptions that this JMethodSignature lists
* in it's throws clause.
*
* @return the exceptions that this JMethodSignature lists
* in it's throws clause.
**/
public JClass[] getExceptions()
{
JClass[] jclasses = new JClass[exceptions.size()];
exceptions.copyInto( jclasses );
return jclasses;
} //-- getExceptions
/**
* Returns the JDocComment describing this JMethodSignature
*
* @return the JDocComment describing this JMethodSignature
**/
public JDocComment getJDocComment()
{
return this.jdc;
} //-- getJDocComment
/**
* Returns the modifiers for this JMethodSignature.
*
* @return the modifiers for this JMethodSignature.
**/
public JModifiers getModifiers()
{
return this.modifiers;
} //-- getModifiers
/**
* Returns the name of the method.
*
* @return the name of the method.
**/
public String getName()
{
return this.name;
} //-- getName
/**
* Returns the JParameter at the given index.
*
* @param index the index of the JParameter to return.
* @return the JParameter at the given index.
**/
public JParameter getParameter( int index )
{
return (JParameter) params.get( index );
} //-- getParameter
/**
* Returns the set of JParameters for this JMethodSignature
*
* Note: the array is a copy, the params in the array
* are the actual references.
* @return the set of JParameters for this JMethod
**/
public synchronized JParameter[] getParameters()
{
JParameter[] pArray = new JParameter[params.size()];
for ( int i = 0; i < pArray.length; i++ )
{
pArray[i] = (JParameter) params.get( i );
}
return pArray;
} //-- getParameters
/**
* Returns the JType that represents the return type for the
* method signature.
*
* @return the JType that represents the return type for the
* method signature.
**/
public JType getReturnType()
{
return returnType;
} //-- getReturnType
/**
* Sets the comment describing this JMethodSignature.
*
* @param comment the comment for this member
* @see #getJDocComment
**/
public void setComment( String comment )
{
jdc.setComment( comment );
} //-- setComment
/**
* Sets the JModifiers for this method signature.
*
* @param modifiers the JModifiers for this method signature.
**/
public void setModifiers( JModifiers modifiers )
{
this.modifiers = modifiers.copy();
this.modifiers.setFinal( false );
} //-- setModifiers
/**
* Prints the method signature. A semi-colon (end-of-statement
* terminator ';') will Not be printed.
*
* @param jsw the JSourceWriter to print to.
**/
public void print( JSourceWriter jsw )
{
print( jsw, true );
} //-- print
/**
* Prints the method signature. A semi-colon (end-of-statement
* terminator ';') will Not be printed.
*
* @param jsw the JSourceWriter to print to.
* @param printJavaDoc a boolean that when true prints the JDocComment
* associated with this method signature.
**/
public void print( JSourceWriter jsw, boolean printJavaDoc )
{
//------------/
//- Java Doc -/
//------------/
if ( printJavaDoc ) jdc.print( jsw );
//-----------------/
//- Method Source -/
//-----------------/
jsw.write( modifiers.toString() );
if ( modifiers.toString().length() > 0 )
{
jsw.write( ' ' );
}
if ( returnType != null )
{
jsw.write( returnType );
}
else
jsw.write( "void" );
jsw.write( ' ' );
jsw.write( name );
jsw.write( '(' );
//-- print parameters
if ( params.size() > 0 )
{
jsw.write( ' ' );
for ( int i = 0; i < params.size(); i++ )
{
if ( i > 0 ) jsw.write( ", " );
jsw.write( params.get( i ) );
}
jsw.write( ' ' );
}
jsw.write( ')' );
if ( exceptions.size() > 0 )
{
jsw.writeln();
jsw.write( " throws " );
for ( int i = 0; i < exceptions.size(); i++ )
{
if ( i > 0 ) jsw.write( ", " );
JClass jClass = (JClass) exceptions.elementAt( i );
jsw.write( jClass.getName() );
}
}
} //-- print
/**
* Returns the String representation of this JMethod,
* which is the method prototype.
* @return the String representation of this JMethod, which
* is simply the method prototype
**/
public String toString()
{
StringBuffer sb = new StringBuffer();
if ( returnType != null )
{
sb.append( returnType );
}
else
sb.append( "void" );
sb.append( ' ' );
sb.append( name );
sb.append( '(' );
//-- print parameters
if ( params.size() > 0 )
{
sb.append( ' ' );
for ( int i = 0; i < params.size(); i++ )
{
JParameter jParam = (JParameter) params.get( i );
if ( i > 0 ) sb.append( ", " );
sb.append( jParam.getType().getName() );
}
sb.append( ' ' );
}
sb.append( ')' );
return sb.toString();
} //-- toString
protected String[] getParameterClassNames()
{
Vector names = new Vector( params.size() );
for ( int i = 0; i < params.size(); i++ )
{
JType jType = ( (JParameter) params.get( i ) ).getType();
while ( jType.isArray() ) jType = jType.getComponentType();
if ( !jType.isPrimitive() )
{
JClass jclass = (JClass) jType;
names.addElement( jclass.getName() );
}
}
String[] names_array = new String[names.size()];
names.copyInto( names_array );
return names_array;
} //-- getParameterClassNames
} //-- JMethodSignature © 2015 - 2025 Weber Informatics LLC | Privacy Policy