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Modello SnakeYaml Plugin generates YAML readers and writers based on SnakeYaml Streaming APIs, plus reader delegates to be able to read
multiple model versions.
package org.codehaus.modello.plugin.snakeyaml;
/*
* Copyright (c) 2004-2013, Codehaus.org
*
* Permission is hereby granted, free of charge, to any person obtaining a copy of
* this software and associated documentation files (the "Software"), to deal in
* the Software without restriction, including without limitation the rights to
* use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies
* of the Software, and to permit persons to whom the Software is furnished to do
* so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in all
* copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
* SOFTWARE.
*/
import java.io.IOException;
import java.util.List;
import java.util.Properties;
import org.codehaus.modello.ModelloException;
import org.codehaus.modello.model.Model;
import org.codehaus.modello.model.ModelAssociation;
import org.codehaus.modello.model.ModelClass;
import org.codehaus.modello.model.ModelDefault;
import org.codehaus.modello.model.ModelField;
import org.codehaus.modello.plugin.java.javasource.JClass;
import org.codehaus.modello.plugin.java.javasource.JMethod;
import org.codehaus.modello.plugin.java.javasource.JParameter;
import org.codehaus.modello.plugin.java.javasource.JSourceCode;
import org.codehaus.modello.plugin.java.javasource.JSourceWriter;
import org.codehaus.modello.plugin.java.javasource.JType;
import org.codehaus.modello.plugin.java.metadata.JavaClassMetadata;
import org.codehaus.modello.plugin.java.metadata.JavaFieldMetadata;
import org.codehaus.modello.plugin.model.ModelClassMetadata;
import org.codehaus.modello.plugins.xml.metadata.XmlAssociationMetadata;
import org.codehaus.modello.plugins.xml.metadata.XmlClassMetadata;
import org.codehaus.modello.plugins.xml.metadata.XmlFieldMetadata;
import org.codehaus.plexus.util.StringUtils;
/**
* @author Simone Tripodi
*/
public class SnakeYamlReaderGenerator
extends AbstractSnakeYamlGenerator
{
private static final String SOURCE_PARAM = "source";
private static final String LOCATION_VAR = "_location";
private ModelClass locationTracker;
private String locationField;
private ModelClass sourceTracker;
private String trackingArgs;
protected boolean isLocationTracking()
{
return false;
}
public void generate( Model model, Properties parameters )
throws ModelloException
{
initialize( model, parameters );
locationTracker = sourceTracker = null;
trackingArgs = locationField = "";
if ( isLocationTracking() )
{
locationTracker = model.getLocationTracker( getGeneratedVersion() );
if ( locationTracker == null )
{
throw new ModelloException( "No model class has been marked as location tracker"
+ " via the attribute locationTracker=\"locations\""
+ ", cannot generate extended reader." );
}
locationField =
( (ModelClassMetadata) locationTracker.getMetadata( ModelClassMetadata.ID ) ).getLocationTracker();
sourceTracker = model.getSourceTracker( getGeneratedVersion() );
if ( sourceTracker != null )
{
trackingArgs += ", " + SOURCE_PARAM;
}
}
try
{
generateSnakeYamlReader();
}
catch ( IOException ex )
{
throw new ModelloException( "Exception while generating SnakeYaml Reader.", ex );
}
}
private void writeAllClassesReaders( Model objectModel, JClass jClass )
{
ModelClass root = objectModel.getClass( objectModel.getRoot( getGeneratedVersion() ), getGeneratedVersion() );
for ( ModelClass clazz : getClasses( objectModel ) )
{
if ( isTrackingSupport( clazz ) )
{
continue;
}
writeClassReaders( clazz, jClass, root.getName().equals( clazz.getName() ) );
}
}
private void writeClassReaders( ModelClass modelClass, JClass jClass, boolean rootElement )
{
JavaClassMetadata javaClassMetadata =
(JavaClassMetadata) modelClass.getMetadata( JavaClassMetadata.class.getName() );
// Skip abstract classes, no way to parse them out into objects
if ( javaClassMetadata.isAbstract() )
{
return;
}
XmlClassMetadata xmlClassMetadata = (XmlClassMetadata) modelClass.getMetadata( XmlClassMetadata.ID );
if ( !rootElement && !xmlClassMetadata.isStandaloneRead() )
{
return;
}
String className = modelClass.getName();
String capClassName = capitalise( className );
String readerMethodName = "read";
if ( !rootElement )
{
readerMethodName += capClassName;
}
// ----------------------------------------------------------------------
// Write the read(Parser) method which will do the unmarshalling.
// ----------------------------------------------------------------------
JMethod unmarshall = new JMethod( readerMethodName, new JClass( className ), null );
unmarshall.getModifiers().makePrivate();
unmarshall.addParameter( new JParameter( new JClass( "Parser" ), "parser" ) );
unmarshall.addParameter( new JParameter( JClass.BOOLEAN, "strict" ) );
addTrackingParameters( unmarshall );
unmarshall.addException( new JClass( "IOException" ) );
JSourceCode sc = unmarshall.getSourceCode();
String variableName = uncapitalise( className );
sc.add( "Event event;" );
sc.add( "if ( !( event = parser.getEvent() ).is( Event.ID.StreamStart ) )" );
sc.add( "{" );
sc.addIndented( "throw new ParserException( \"Expected Stream Start event\", event.getStartMark(), \"\", null );" );
sc.add( "}" );
sc.add( "if ( !( event = parser.getEvent() ).is( Event.ID.DocumentStart ) )" );
sc.add( "{" );
sc.addIndented( "throw new ParserException( \"Expected Document Start event\", event.getStartMark(), \"\", null );" );
sc.add( "}" );
sc.add( "" );
sc.add(
className + ' ' + variableName + " = parse" + capClassName + "( parser, strict" + trackingArgs + " );" );
if ( rootElement )
{
// TODO
// sc.add( variableName + ".setModelEncoding( parser.getInputEncoding() );" );
}
sc.add( "" );
sc.add( "if ( !( event = parser.getEvent() ).is( Event.ID.DocumentEnd ) )" );
sc.add( "{" );
sc.addIndented( "throw new ParserException( \"Expected Document End event\", event.getStartMark(), \"\", null );" );
sc.add( "}" );
sc.add( "if ( !( event = parser.getEvent() ).is( Event.ID.StreamEnd ) )" );
sc.add( "{" );
sc.addIndented( "throw new ParserException( \"Expected Stream End event\", event.getStartMark(), \"\", null );" );
sc.add( "}" );
sc.add( "" );
sc.add( "return " + variableName + ';' );
jClass.addMethod( unmarshall );
// ----------------------------------------------------------------------
// Write the read(Reader[,boolean]) methods which will do the unmarshalling.
// ----------------------------------------------------------------------
unmarshall = new JMethod( readerMethodName, new JClass( className ), null );
unmarshall.addParameter( new JParameter( new JClass( "Reader" ), "reader" ) );
unmarshall.addParameter( new JParameter( JClass.BOOLEAN, "strict" ) );
addTrackingParameters( unmarshall );
unmarshall.addException( new JClass( "IOException" ) );
sc = unmarshall.getSourceCode();
sc.add( "Parser parser = new ParserImpl( new StreamReader( reader ) );" );
sc.add( "return " + readerMethodName + "( parser, strict );" );
jClass.addMethod( unmarshall );
unmarshall = new JMethod( readerMethodName, new JClass( className ), null );
unmarshall.addParameter( new JParameter( new JClass( "Reader" ), "reader" ) );
unmarshall.addException( new JClass( "IOException" ) );
sc = unmarshall.getSourceCode();
sc.add( "return " + readerMethodName + "( reader, true );" );
jClass.addMethod( unmarshall );
// ----------------------------------------------------------------------
// Write the read(InputStream[,boolean]) methods which will do the unmarshalling.
// ----------------------------------------------------------------------
unmarshall = new JMethod( readerMethodName, new JClass( className ), null );
unmarshall.addParameter( new JParameter( new JClass( "InputStream" ), "in" ) );
unmarshall.addParameter( new JParameter( JClass.BOOLEAN, "strict" ) );
addTrackingParameters( unmarshall );
unmarshall.addException( new JClass( "IOException" ) );
sc = unmarshall.getSourceCode();
sc.add( "return " + readerMethodName + "( new InputStreamReader( in ), strict" + trackingArgs + " );" );
jClass.addMethod( unmarshall );unmarshall = new JMethod( readerMethodName, new JClass( className ), null );
unmarshall.addParameter( new JParameter( new JClass( "InputStream" ), "in" ) );
unmarshall.addException( new JClass( "IOException" ) );
sc = unmarshall.getSourceCode();
sc.add( "return " + readerMethodName + "( in, true );" );
jClass.addMethod( unmarshall );
// --------------------------------------------------------------------
}
private void generateSnakeYamlReader()
throws ModelloException, IOException
{
Model objectModel = getModel();
String packageName =
objectModel.getDefaultPackageName( isPackageWithVersion(), getGeneratedVersion() ) + ".io.snakeyaml";
String unmarshallerName = getFileName( "SnakeYamlReader" + ( isLocationTracking() ? "Ex" : "" ) );
JSourceWriter sourceWriter = newJSourceWriter( packageName, unmarshallerName );
JClass jClass = new JClass( packageName + '.' + unmarshallerName );
initHeader( jClass );
suppressAllWarnings( objectModel, jClass );
jClass.addImport( "org.yaml.snakeyaml.events.DocumentEndEvent" );
jClass.addImport( "org.yaml.snakeyaml.events.DocumentStartEvent" );
jClass.addImport( "org.yaml.snakeyaml.events.Event" );
jClass.addImport( "org.yaml.snakeyaml.events.ImplicitTuple" );
jClass.addImport( "org.yaml.snakeyaml.events.MappingEndEvent" );
jClass.addImport( "org.yaml.snakeyaml.events.MappingStartEvent" );
jClass.addImport( "org.yaml.snakeyaml.events.ScalarEvent" );
jClass.addImport( "org.yaml.snakeyaml.events.SequenceEndEvent" );
jClass.addImport( "org.yaml.snakeyaml.events.SequenceStartEvent" );
jClass.addImport( "org.yaml.snakeyaml.events.StreamEndEvent" );
jClass.addImport( "org.yaml.snakeyaml.events.StreamStartEvent" );
jClass.addImport( "org.yaml.snakeyaml.parser.Parser" );
jClass.addImport( "org.yaml.snakeyaml.parser.ParserException" );
jClass.addImport( "org.yaml.snakeyaml.parser.ParserImpl" );
jClass.addImport( "org.yaml.snakeyaml.reader.StreamReader" );
jClass.addImport( "java.io.InputStream" );
jClass.addImport( "java.io.InputStreamReader" );
jClass.addImport( "java.io.IOException" );
jClass.addImport( "java.io.Reader" );
jClass.addImport( "java.text.DateFormat" );
jClass.addImport( "java.util.Set" );
jClass.addImport( "java.util.HashSet" );
addModelImports( jClass, null );
// ----------------------------------------------------------------------
// Write the class parsers
// ----------------------------------------------------------------------
writeAllClassesParser( objectModel, jClass );
// ----------------------------------------------------------------------
// Write the class readers
// ----------------------------------------------------------------------
writeAllClassesReaders( objectModel, jClass );
// ----------------------------------------------------------------------
// Write helpers
// ----------------------------------------------------------------------
writeHelpers( jClass );
// ----------------------------------------------------------------------
//
// ----------------------------------------------------------------------
jClass.print( sourceWriter );
sourceWriter.close();
}
private void writeAllClassesParser( Model objectModel, JClass jClass )
{
ModelClass root = objectModel.getClass( objectModel.getRoot( getGeneratedVersion() ), getGeneratedVersion() );
for ( ModelClass clazz : getClasses( objectModel ) )
{
if ( isTrackingSupport( clazz ) )
{
continue;
}
writeClassParser( clazz, jClass, root.getName().equals( clazz.getName() ) );
}
}
private void writeClassParser( ModelClass modelClass, JClass jClass, boolean rootElement )
{
JavaClassMetadata javaClassMetadata =
(JavaClassMetadata) modelClass.getMetadata( JavaClassMetadata.class.getName() );
// Skip abstract classes, no way to parse them out into objects
if ( javaClassMetadata.isAbstract() )
{
return;
}
String className = modelClass.getName();
String capClassName = capitalise( className );
String uncapClassName = uncapitalise( className );
JMethod unmarshall = new JMethod( "parse" + capClassName, new JClass( className ), null );
unmarshall.getModifiers().makePrivate();
unmarshall.addParameter( new JParameter( new JClass( "Parser" ), "parser" ) );
unmarshall.addParameter( new JParameter( JClass.BOOLEAN, "strict" ) );
addTrackingParameters( unmarshall );
unmarshall.addException( new JClass( "IOException" ) );
JSourceCode sc = unmarshall.getSourceCode();
sc.add( "Event event = parser.getEvent();" );
sc.add( "" );
sc.add( "if ( !event.is( Event.ID.MappingStart ) )" );
sc.add( "{" );
sc.addIndented( "throw new ParserException( \"Expected '"
+ className
+ "' data to start with a Mapping\", event.getStartMark(), \"\", null );" );
sc.add( "}" );
sc.add( "" );
sc.add( className + " " + uncapClassName + " = new " + className + "();" );
if ( locationTracker != null )
{
sc.add( locationTracker.getName() + " " + LOCATION_VAR + ";" );
writeNewSetLocation( "\"\"", uncapClassName, null, sc );
}
ModelField contentField = null;
List modelFields = getFieldsForXml( modelClass, getGeneratedVersion() );
// read all XML attributes first
contentField = writeClassAttributesParser( modelFields, uncapClassName, rootElement );
// then read content, either content field or elements
if ( contentField != null )
{
writePrimitiveField( contentField, contentField.getType(), uncapClassName, uncapClassName, "\"\"",
"set" + capitalise( contentField.getName() ), sc, false );
}
else
{
//Write other fields
sc.add( "Set parsed = new HashSet();" );
sc.add( "" );
sc.add( "while ( !( event = parser.getEvent() ).is( Event.ID.MappingEnd ) )" );
sc.add( "{" );
sc.indent();
boolean addElse = false;
for ( ModelField field : modelFields )
{
XmlFieldMetadata xmlFieldMetadata = (XmlFieldMetadata) field.getMetadata( XmlFieldMetadata.ID );
processField( field, xmlFieldMetadata, addElse, sc, uncapClassName, jClass );
addElse = true;
}
if ( addElse )
{
sc.add( "else" );
sc.add( "{" );
sc.indent();
}
sc.add( "checkUnknownElement( event, parser, strict );" );
if ( addElse )
{
sc.unindent();
sc.add( "}" );
}
sc.unindent();
sc.add( "}" );
}
sc.add( "return " + uncapClassName + ";" );
jClass.addMethod( unmarshall );
}
private ModelField writeClassAttributesParser( List modelFields, String objectName, boolean rootElement )
{
ModelField contentField = null;
for ( ModelField field : modelFields )
{
XmlFieldMetadata xmlFieldMetadata = (XmlFieldMetadata) field.getMetadata( XmlFieldMetadata.ID );
// TODO check if we have already one with this type and throws Exception
if ( xmlFieldMetadata.isContent() )
{
contentField = field;
}
}
return contentField;
}
/**
* Generate code to process a field represented as an XML element.
*
* @param field the field to process
* @param xmlFieldMetadata its XML metadata
* @param addElse add an else statement before generating a new if
* @param sc the method source code to add to
* @param objectName the object name in the source
* @param jClass the generated class source file
*/
private void processField( ModelField field, XmlFieldMetadata xmlFieldMetadata, boolean addElse, JSourceCode sc,
String objectName, JClass jClass )
{
String fieldTagName = resolveTagName( field, xmlFieldMetadata );
String capFieldName = capitalise( field.getName() );
String singularName = singular( field.getName() );
String alias;
if ( StringUtils.isEmpty( field.getAlias() ) )
{
alias = "null";
}
else
{
alias = "\"" + field.getAlias() + "\"";
}
String tagComparison =
( addElse ? "else " : "" ) + "if ( checkFieldWithDuplicate( event, \"" + fieldTagName + "\", " + alias
+ ", parsed ) )";
if ( !( field instanceof ModelAssociation ) )
{ // model field
sc.add( tagComparison );
sc.add( "{" );
sc.indent();
writePrimitiveField( field, field.getType(), objectName, objectName, "\"" + field.getName() + "\"",
"set" + capFieldName, sc, false );
sc.unindent();
sc.add( "}" );
}
else
{ // model association
ModelAssociation association = (ModelAssociation) field;
String associationName = association.getName();
if ( association.isOneMultiplicity() )
{
sc.add( tagComparison );
sc.add( "{" );
sc.indent();
// sc.add( "// consume current key" );
// sc.add( "parser.getEvent();" );
sc.add( objectName
+ ".set"
+ capFieldName
+ "( parse"
+ association.getTo()
+ "( parser, strict"
+ trackingArgs
+ " ) );" );
sc.unindent();
sc.add( "}" );
}
else
{
//MANY_MULTIPLICITY
XmlAssociationMetadata xmlAssociationMetadata =
(XmlAssociationMetadata) association.getAssociationMetadata( XmlAssociationMetadata.ID );
String type = association.getType();
if ( ModelDefault.LIST.equals( type ) || ModelDefault.SET.equals( type ) )
{
boolean inModel = isClassInModel( association.getTo(), field.getModelClass().getModel() );
sc.add( ( addElse ? "else " : "" )
+ "if ( checkFieldWithDuplicate( event, \""
+ fieldTagName
+ "\", "
+ alias
+ ", parsed ) )" );
sc.add( "{" );
sc.indent();
sc.add( "if ( !parser.getEvent().is( Event.ID.SequenceStart ) )" );
sc.add( "{" );
sc.addIndented( "throw new ParserException( \"Expected '"
+ field.getName()
+ "' data to start with a Sequence\", event.getStartMark(), \"\", null );" );
sc.add( "}" );
JavaFieldMetadata javaFieldMetadata = (JavaFieldMetadata) association.getMetadata( JavaFieldMetadata.ID );
String adder;
if ( javaFieldMetadata.isGetter() && javaFieldMetadata.isSetter() )
{
sc.add( type + " " + associationName + " = " + objectName + ".get" + capFieldName + "();" );
sc.add( "if ( " + associationName + " == null )" );
sc.add( "{" );
sc.indent();
sc.add( associationName + " = " + association.getDefaultValue() + ";" );
sc.add( objectName + ".set" + capFieldName + "( " + associationName + " );" );
sc.unindent();
sc.add( "}" );
adder = associationName + ".add";
}
else
{
adder = objectName + ".add" + association.getTo();
}
if ( !inModel && locationTracker != null )
{
sc.add( locationTracker.getName() + " " + LOCATION_VAR + "s = " + objectName + ".get"
+ capitalise( singular( locationField ) ) + "( \"" + field.getName()
+ "\" );" );
sc.add( "if ( " + LOCATION_VAR + "s == null )" );
sc.add( "{" );
sc.indent();
writeNewSetLocation( field, objectName, LOCATION_VAR + "s", sc );
sc.unindent();
sc.add( "}" );
}
if ( inModel )
{
sc.add( "while ( !parser.peekEvent().is( Event.ID.SequenceEnd ) )" );
sc.add( "{" );
sc.addIndented( adder + "( parse" + association.getTo() + "( parser, strict" + trackingArgs + " ) );" );
sc.add( "}" );
sc.add( "parser.getEvent();" );
}
else
{
String key;
if ( ModelDefault.SET.equals( type ) )
{
key = "?";
}
else
{
key = ( useJava5 ? "Integer.valueOf" : "new java.lang.Integer" ) + "( " + associationName
+ ".size() )";
}
writePrimitiveField( association, association.getTo(), associationName, LOCATION_VAR + "s", key,
"add", sc, false );
}
sc.unindent();
sc.add( "}" );
}
else
{
//Map or Properties
sc.add( tagComparison );
sc.add( "{" );
sc.indent();
if ( locationTracker != null )
{
sc.add( locationTracker.getName() + " " + LOCATION_VAR + "s;" );
writeNewSetLocation( field, objectName, LOCATION_VAR + "s", sc );
}
if ( xmlAssociationMetadata.isMapExplode() )
{
sc.add( "if ( !parser.getEvent().is( Event.ID.SequenceStart ) )" );
sc.add( "{" );
sc.addIndented( "throw new ParserException( \"Expected '"
+ field.getName()
+ "' data to start with a Sequence\", event.getStartMark(), \"\", null );" );
sc.add( "}" );
sc.add( "while ( !parser.peekEvent().is( Event.ID.SequenceEnd ) )" );
sc.add( "{" );
sc.indent();
sc.add( "event = parser.getEvent();" );
sc.add( "" );
sc.add( "if ( !event.is( Event.ID.MappingStart ) )" );
sc.add( "{" );
sc.addIndented( "throw new ParserException( \"Expected '"
+ fieldTagName
+ "' item data to start with a Mapping\", event.getStartMark(), \"\", null );" );
sc.add( "}" );
sc.add( "String key = null;" );
sc.add( "String value = null;" );
sc.add( "Set parsedPropertiesElements = new HashSet();" );
sc.add( "while ( !( event = parser.getEvent() ).is( Event.ID.MappingEnd ) )" );
sc.add( "{" );
sc.indent();
sc.add( "if ( checkFieldWithDuplicate( event, \"key\", \"\", parsedPropertiesElements ) )" );
sc.add( "{" );
String parserGetter = "( (ScalarEvent) parser.getEvent() ).getValue()";
if ( xmlFieldMetadata.isTrim() )
{
parserGetter = "getTrimmedValue( " + parserGetter + " )";
}
sc.addIndented( "key = " + parserGetter + ";" );
sc.add( "}" );
sc.add( "else if ( checkFieldWithDuplicate( event, \"value\", \"\", parsedPropertiesElements ) )" );
sc.add( "{" );
parserGetter = "( (ScalarEvent) parser.getEvent() ).getValue()";
if ( xmlFieldMetadata.isTrim() )
{
parserGetter = "getTrimmedValue( " + parserGetter + " )";
}
sc.addIndented( "value = " + parserGetter + ";" );
sc.add( "}" );
sc.add( "else" );
sc.add( "{" );
sc.addIndented( "checkUnknownElement( event, parser, strict );" );
sc.add( "}" );
sc.unindent();
sc.add( "}" );
sc.add( objectName + ".add" + capitalise( singularName ) + "( key, value );" );
sc.unindent();
sc.add( "}" );
}
else
{
//INLINE Mode
sc.add( "if ( !parser.getEvent().is( Event.ID.MappingStart ) )" );
sc.add( "{" );
sc.addIndented( "throw new ParserException( \"Expected '"
+ field.getName()
+ "' data to start with a Mapping\", event.getStartMark(), \"\", null );" );
sc.add( "}" );
sc.add( "while ( !parser.peekEvent().is( Event.ID.MappingEnd ) )" );
sc.add( "{" );
sc.indent();
sc.add( "String key = ( (ScalarEvent) parser.getEvent() ).getValue();" );
writeNewSetLocation( "key", LOCATION_VAR + "s", null, sc );
sc.add(
"String value = ( (ScalarEvent) parser.getEvent() ).getValue()" + ( xmlFieldMetadata.isTrim() ? ".trim()" : "" ) + ";" );
sc.add( objectName + ".add" + capitalise( singularName ) + "( key, value );" );
sc.unindent();
sc.add( "}" );
}
sc.add( "parser.getEvent();" );
sc.unindent();
sc.add( "}" );
}
}
}
}
private void writeHelpers( JClass jClass )
{
JMethod method = new JMethod( "getTrimmedValue", new JClass( "String" ), null );
method.getModifiers().makePrivate();
method.addParameter( new JParameter( new JClass( "String" ), "s" ) );
JSourceCode sc = method.getSourceCode();
sc.add( "if ( s != null )" );
sc.add( "{" );
sc.addIndented( "s = s.trim();" );
sc.add( "}" );
sc.add( "return s;" );
jClass.addMethod( method );
// --------------------------------------------------------------------
method = new JMethod( "getRequiredAttributeValue", new JClass( "String" ), null );
method.addException( new JClass( "ParserException" ) );
method.getModifiers().makePrivate();
method.addParameter( new JParameter( new JClass( "String" ), "s" ) );
method.addParameter( new JParameter( new JClass( "String" ), "attribute" ) );
method.addParameter( new JParameter( new JClass( "Parser" ), "parser" ) );
method.addParameter( new JParameter( JClass.BOOLEAN, "strict" ) );
sc = method.getSourceCode();
sc.add( "if ( s == null )" );
sc.add( "{" );
sc.indent();
sc.add( "if ( strict )" );
sc.add( "{" );
sc.addIndented(
"throw new ParserException( \"Missing required value for attribute '\" + attribute + \"'\", parser.peekEvent().getStartMark(), \"\", null );" );
sc.add( "}" );
sc.unindent();
sc.add( "}" );
sc.add( "return s;" );
jClass.addMethod( method );
// --------------------------------------------------------------------
method = new JMethod( "checkFieldWithDuplicate", JType.BOOLEAN, null );
method.getModifiers().makePrivate();
method.addParameter( new JParameter( new JClass( "Event" ), "event" ) );
method.addParameter( new JParameter( new JClass( "String" ), "tagName" ) );
method.addParameter( new JParameter( new JClass( "String" ), "alias" ) );
method.addParameter( new JParameter( new JClass( "Set" ), "parsed" ) );
method.addException( new JClass( "IOException" ) );
sc = method.getSourceCode();
sc.add( "String currentName = ( (ScalarEvent) event ).getValue();" );
sc.add( "" );
sc.add( "if ( !( currentName.equals( tagName ) || currentName.equals( alias ) ) )" );
sc.add( "{" );
sc.addIndented( "return false;" );
sc.add( "}" );
sc.add( "if ( !parsed.add( tagName ) )" );
sc.add( "{" );
sc.addIndented( "throw new ParserException( \"Duplicated tag: '\" + tagName + \"'\", event.getStartMark(), \"\", null );" );
sc.add( "}" );
sc.add( "return true;" );
jClass.addMethod( method );
// --------------------------------------------------------------------
method = new JMethod( "checkUnknownElement", null, null );
method.getModifiers().makePrivate();
method.addParameter( new JParameter( new JClass( "Event" ), "event" ) );
method.addParameter( new JParameter( new JClass( "Parser" ), "parser" ) );
method.addParameter( new JParameter( JType.BOOLEAN, "strict" ) );
method.addException( new JClass( "IOException" ) );
sc = method.getSourceCode();
sc.add( "if ( strict )" );
sc.add( "{" );
sc.addIndented(
"throw new ParserException( \"Unrecognised tag: '\" + ( (ScalarEvent) event ).getValue() + \"'\", event.getStartMark(), \"\", null );" );
sc.add( "}" );
sc.add( "" );
sc.add( "for ( int unrecognizedTagCount = 1; unrecognizedTagCount > 0; )" );
sc.add( "{" );
sc.indent();
sc.add( "event = parser.getEvent();" );
sc.add( "if ( event.is( Event.ID.MappingStart ) )" );
sc.add( "{" );
sc.addIndented( "unrecognizedTagCount++;" );
sc.add( "}" );
sc.add( "else if ( event.is( Event.ID.MappingEnd ) )" );
sc.add( "{" );
sc.addIndented( "unrecognizedTagCount--;" );
sc.add( "}" );
sc.unindent();
sc.add( "}" );
jClass.addMethod( method );
// --------------------------------------------------------------------
method = new JMethod( "checkUnknownAttribute", null, null );
method.getModifiers().makePrivate();
method.addParameter( new JParameter( new JClass( "Parser" ), "parser" ) );
method.addParameter( new JParameter( new JClass( "String" ), "attribute" ) );
method.addParameter( new JParameter( new JClass( "String" ), "tagName" ) );
method.addParameter( new JParameter( JType.BOOLEAN, "strict" ) );
method.addException( new JClass( "IOException" ) );
sc = method.getSourceCode();
if ( strictXmlAttributes )
{
sc.add(
"// strictXmlAttributes = true for model: if strict == true, not only elements are checked but attributes too" );
sc.add( "if ( strict )" );
sc.add( "{" );
sc.addIndented(
"throw new ParserException( \"\", parser.peekEvent().getStartMark(), \"Unknown attribute '\" + attribute + \"' for tag '\" + tagName + \"'\", parser.peekEvent().getEndMark() );" );
sc.add( "}" );
}
else
{
sc.add(
"// strictXmlAttributes = false for model: always ignore unknown XML attribute, even if strict == true" );
}
jClass.addMethod( method );
// --------------------------------------------------------------------
method = new JMethod( "getBooleanValue", JType.BOOLEAN, null );
method.getModifiers().makePrivate();
method.addParameter( new JParameter( new JClass( "String" ), "s" ) );
sc = method.getSourceCode();
sc.add( "if ( s != null )" );
sc.add( "{" );
sc.addIndented( "return Boolean.valueOf( s ).booleanValue();" );
sc.add( "}" );
sc.add( "return false;" );
jClass.addMethod( method );
// --------------------------------------------------------------------
method = new JMethod( "getCharacterValue", JType.CHAR, null );
method.getModifiers().makePrivate();
method.addParameter( new JParameter( new JClass( "String" ), "s" ) );
sc = method.getSourceCode();
sc.add( "if ( s != null )" );
sc.add( "{" );
sc.addIndented( "return s.charAt( 0 );" );
sc.add( "}" );
sc.add( "return 0;" );
jClass.addMethod( method );
// --------------------------------------------------------------------
method = convertNumericalType( "getIntegerValue", JType.INT, "Integer.valueOf( s ).intValue()", "an integer" );
jClass.addMethod( method );
// --------------------------------------------------------------------
method = convertNumericalType( "getShortValue", JType.SHORT, "Short.valueOf( s ).shortValue()",
"a short integer" );
jClass.addMethod( method );
// --------------------------------------------------------------------
method = convertNumericalType( "getByteValue", JType.BYTE, "Byte.valueOf( s ).byteValue()", "a byte" );
jClass.addMethod( method );
// --------------------------------------------------------------------
method = convertNumericalType( "getLongValue", JType.LONG, "Long.valueOf( s ).longValue()", "a long integer" );
jClass.addMethod( method );
// --------------------------------------------------------------------
method = convertNumericalType( "getFloatValue", JType.FLOAT, "Float.valueOf( s ).floatValue()",
"a floating point number" );
jClass.addMethod( method );
// --------------------------------------------------------------------
method = convertNumericalType( "getDoubleValue", JType.DOUBLE, "Double.valueOf( s ).doubleValue()",
"a floating point number" );
jClass.addMethod( method );
// --------------------------------------------------------------------
method = new JMethod( "getDateValue", new JClass( "java.util.Date" ), null );
method.getModifiers().makePrivate();
method.addParameter( new JParameter( new JClass( "String" ), "s" ) );
method.addParameter( new JParameter( new JClass( "String" ), "dateFormat" ) );
method.addParameter( new JParameter( new JClass( "Event" ), "event" ) );
writeDateParsingHelper( method.getSourceCode(), "new ParserException( \"\", event.getStartMark(), e.getMessage(), event.getEndMark() )" );
jClass.addMethod( method );
// --------------------------------------------------------------------
method = new JMethod( "getDefaultValue", new JClass( "String" ), null );
method.getModifiers().makePrivate();
method.addParameter( new JParameter( new JClass( "String" ), "s" ) );
method.addParameter( new JParameter( new JClass( "String" ), "v" ) );
sc = method.getSourceCode();
sc.add( "if ( s == null )" );
sc.add( "{" );
sc.addIndented( "s = v;" );
sc.add( "}" );
sc.add( "return s;" );
jClass.addMethod( method );
}
private void addTrackingParameters( JMethod method )
{
if ( sourceTracker != null )
{
method.addParameter( new JParameter( new JClass( sourceTracker.getName() ), SOURCE_PARAM ) );
}
}
private void writeNewSetLocation( ModelField field, String objectName, String trackerVariable, JSourceCode sc )
{
writeNewSetLocation( "\"" + field.getName() + "\"", objectName, trackerVariable, sc );
}
private void writeNewSetLocation( String key, String objectName, String trackerVariable, JSourceCode sc )
{
writeNewLocation( trackerVariable, sc );
writeSetLocation( key, objectName, trackerVariable, sc );
}
private void writeNewLocation( String trackerVariable, JSourceCode sc )
{
if ( locationTracker == null )
{
return;
}
String constr = "new " + locationTracker.getName() + "( parser.getLineNumber(), parser.getColumnNumber()";
constr += ( sourceTracker != null ) ? ", " + SOURCE_PARAM : "";
constr += " )";
sc.add( ( ( trackerVariable != null ) ? trackerVariable : LOCATION_VAR ) + " = " + constr + ";" );
}
private void writeSetLocation( String key, String objectName, String trackerVariable, JSourceCode sc )
{
if ( locationTracker == null )
{
return;
}
String variable = ( trackerVariable != null ) ? trackerVariable : LOCATION_VAR;
sc.add( objectName + ".set" + capitalise( singular( locationField ) ) + "( " + key + ", " + variable + " );" );
}
/**
* Write code to set a primitive field with a value got from the parser, with appropriate default value, trimming
* and required check logic.
*
* @param field the model field to set (either XML attribute or element)
* @param type the type of the value read from XML
* @param objectName the object name in source
* @param setterName the setter method name
* @param sc the source code to add to
*/
private void writePrimitiveField( ModelField field, String type, String objectName, String locatorName,
String locationKey, String setterName, JSourceCode sc, boolean wrappedItem )
{
XmlFieldMetadata xmlFieldMetadata = (XmlFieldMetadata) field.getMetadata( XmlFieldMetadata.ID );
String tagName = resolveTagName( field, xmlFieldMetadata );
String parserGetter = "( (ScalarEvent) parser.getEvent() ).getValue()";
/* TODO:
if ( xmlFieldMetadata.isRequired() )
{
parserGetter = "getRequiredAttributeValue( " + parserGetter + ", \"" + tagName + "\", parser, strict )";
}
*/
if ( field.getDefaultValue() != null )
{
parserGetter = "getDefaultValue( " + parserGetter + ", \"" + field.getDefaultValue() + "\" )";
}
if ( xmlFieldMetadata.isTrim() )
{
parserGetter = "getTrimmedValue( " + parserGetter + " )";
}
if ( "boolean".equals( type ) )
{
sc.add( objectName + "." + setterName + "( getBooleanValue( " + parserGetter + " ) );" );
}
else if ( "char".equals( type ) )
{
sc.add( objectName + "." + setterName + "( getCharacterValue( " + parserGetter + ", \"" + tagName
+ "\" ) );" );
}
else if ( "double".equals( type ) )
{
sc.add( objectName + "." + setterName + "( getDoubleValue( " + parserGetter + ", \"" + tagName
+ "\", parser.peekEvent(), strict ) );" );
}
else if ( "float".equals( type ) )
{
sc.add( objectName + "." + setterName + "( getFloatValue( " + parserGetter + ", \"" + tagName
+ "\", parser.peekEvent(), strict ) );" );
}
else if ( "int".equals( type ) )
{
sc.add( objectName + "." + setterName + "( getIntegerValue( " + parserGetter + ", \"" + tagName
+ "\", parser.peekEvent(), strict ) );" );
}
else if ( "long".equals( type ) )
{
sc.add( objectName + "." + setterName + "( getLongValue( " + parserGetter + ", \"" + tagName
+ "\", parser.peekEvent(), strict ) );" );
}
else if ( "short".equals( type ) )
{
sc.add( objectName + "." + setterName + "( getShortValue( " + parserGetter + ", \"" + tagName
+ "\", parser.peekEvent(), strict ) );" );
}
else if ( "byte".equals( type ) )
{
sc.add( objectName + "." + setterName + "( getByteValue( " + parserGetter + ", \"" + tagName
+ "\", parser.peekEvent(), strict ) );" );
}
else if ( "String".equals( type ) || "Boolean".equals( type ) )
{
// TODO: other Primitive types
sc.add( objectName + "." + setterName + "( " + parserGetter + " );" );
}
else if ( "Date".equals( type ) )
{
sc.add( "String dateFormat = "
+ ( xmlFieldMetadata.getFormat() != null ? "\"" + xmlFieldMetadata.getFormat() + "\"" : "null" ) + ";" );
sc.add( objectName + "." + setterName + "( getDateValue( " + parserGetter + ", \"" + tagName
+ "\", dateFormat, parser.peekEvent() ) );" );
}
else
{
throw new IllegalArgumentException( "Unknown type "
+ type
+ " for field "
+ field.getModelClass().getName()
+ "."
+ field.getName() );
}
}
private JMethod convertNumericalType( String methodName, JType returnType, String expression, String typeDesc )
{
JMethod method = new JMethod( methodName, returnType, null );
method.getModifiers().makePrivate();
method.addParameter( new JParameter( new JClass( "String" ), "s" ) );
method.addParameter( new JParameter( new JClass( "String" ), "attribute" ) );
method.addParameter( new JParameter( new JClass( "Event" ), "event" ) );
method.addParameter( new JParameter( JType.BOOLEAN, "strict" ) );
JSourceCode sc = method.getSourceCode();
sc.add( "if ( s != null )" );
sc.add( "{" );
sc.indent();
sc.add( "try" );
sc.add( "{" );
sc.addIndented( "return " + expression + ";" );
sc.add( "}" );
sc.add( "catch ( NumberFormatException nfe )" );
sc.add( "{" );
sc.indent();
sc.add( "if ( strict )" );
sc.add( "{" );
sc.addIndented( "throw new ParserException( \"\", event.getStartMark(), \"Unable to parse element '\" + attribute + \"', must be "
+ typeDesc
+ " but was '\" + s + \"'\", event.getEndMark() );" );
sc.add( "}" );
sc.unindent();
sc.add( "}" );
sc.unindent();
sc.add( "}" );
sc.add( "return 0;" );
return method;
}
}
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