/*
* gvNIX is an open source tool for rapid application development (RAD).
* Copyright (C) 2010 Generalitat Valenciana
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License along with
* this program. If not, see <http://www.gnu.org/licenses/>.
*/
package org.gvnix.addon.jpa.addon.audit;
import java.lang.reflect.Modifier;
import java.util.ArrayList;
import java.util.List;
import org.apache.commons.lang3.Validate;
import org.apache.commons.lang3.builder.ToStringBuilder;
import org.gvnix.addon.jpa.annotations.audit.GvNIXJpaAuditUserService;
import org.gvnix.support.ItdBuilderHelper;
import org.springframework.roo.classpath.PhysicalTypeIdentifierNamingUtils;
import org.springframework.roo.classpath.PhysicalTypeMetadata;
import org.springframework.roo.classpath.details.MethodMetadata;
import org.springframework.roo.classpath.details.MethodMetadataBuilder;
import org.springframework.roo.classpath.details.annotations.AnnotatedJavaType;
import org.springframework.roo.classpath.details.annotations.AnnotationMetadataBuilder;
import org.springframework.roo.classpath.itd.AbstractItdTypeDetailsProvidingMetadataItem;
import org.springframework.roo.classpath.itd.InvocableMemberBodyBuilder;
import org.springframework.roo.metadata.MetadataIdentificationUtils;
import org.springframework.roo.model.JavaSymbolName;
import org.springframework.roo.model.JavaType;
import org.springframework.roo.project.LogicalPath;
/**
* ITD generator for {@link GvNIXJpaAuditUserService} annotation.
*
* @author <a href="http://www.disid.com">DISID Corporation S.L.</a> made for <a
* href="http://www.dgti.gva.es">General Directorate for Information
* Technologies (DGTI)</a>
* @since 1.3.0
*/
public class JpaAuditUserServiceMetadata extends
AbstractItdTypeDetailsProvidingMetadataItem {
// Constants
private static final String PROVIDES_TYPE_STRING = JpaAuditUserServiceMetadata.class
.getName();
private static final String PROVIDES_TYPE = MetadataIdentificationUtils
.create(PROVIDES_TYPE_STRING);
// Method names
public static final JavaSymbolName GET_USER_METHOD = new JavaSymbolName(
"getUser");
// Refered types
private static final JavaType SEC_AUTHENTICATION = new JavaType(
"org.springframework.security.core.Authentication");
private static final JavaType SEC_SECURITY_CONTEXT_HOLDER = new JavaType(
"org.springframework.security.core.context.SecurityContextHolder");
private static final JavaType ILLEGAL_STATUS_EXCEPTION = new JavaType(
IllegalStateException.class);
public static final String getMetadataIdentiferType() {
return PROVIDES_TYPE;
}
public static final String createIdentifier(JavaType javaType,
LogicalPath path) {
return PhysicalTypeIdentifierNamingUtils.createIdentifier(
PROVIDES_TYPE_STRING, javaType, path);
}
public static final JavaType getJavaType(String metadataIdentificationString) {
return PhysicalTypeIdentifierNamingUtils.getJavaType(
PROVIDES_TYPE_STRING, metadataIdentificationString);
}
public static final LogicalPath getPath(String metadataIdentificationString) {
return PhysicalTypeIdentifierNamingUtils.getPath(PROVIDES_TYPE_STRING,
metadataIdentificationString);
}
public static boolean isValid(String metadataIdentificationString) {
return PhysicalTypeIdentifierNamingUtils.isValid(PROVIDES_TYPE_STRING,
metadataIdentificationString);
}
/**
* Itd builder herlper
*/
private final ItdBuilderHelper helper;
private final JavaType userType;
private final JpaAuditUserServiceAnnotationValues annotationValues;
private final boolean isSpringSecurityInstalled;
private final boolean isUserDetails;
private final boolean isUserEntity;
private final boolean usePatternForDate;
private final String dateTimePattern;
private final String dateTimeStyle;
public JpaAuditUserServiceMetadata(String identifier, JavaType aspectName,
PhysicalTypeMetadata governorPhysicalTypeMetadata,
JpaAuditUserServiceAnnotationValues annotationValues,
JavaType userType, boolean isSpringSecurityInstalled,
boolean isUserDetails, boolean userTypeIsEntity,
boolean usePattern, String dateTimePattern, String dateTimeStyle) {
super(identifier, aspectName, governorPhysicalTypeMetadata);
Validate.isTrue(isValid(identifier), "Metadata identification string '"
+ identifier + "' does not appear to be a valid");
// Helper itd generation
this.helper = new ItdBuilderHelper(this, governorPhysicalTypeMetadata,
builder.getImportRegistrationResolver());
this.annotationValues = annotationValues;
this.userType = userType;
this.isSpringSecurityInstalled = isSpringSecurityInstalled;
this.isUserDetails = isUserDetails;
this.isUserEntity = userTypeIsEntity;
this.usePatternForDate = usePattern;
this.dateTimePattern = dateTimePattern;
this.dateTimeStyle = dateTimeStyle;
// Add listener methods (only in non-abstract entities)
builder.addMethod(getUserMethod());
// Create a representation of the desired output ITD
itdTypeDetails = builder.build();
}
/**
* @return the getUserName method definition
*/
private MethodMetadata getUserMethod() {
// method name
JavaSymbolName methodName = GET_USER_METHOD;
// Define method parameter types
List<AnnotatedJavaType> parameterTypes = new ArrayList<AnnotatedJavaType>();
// Check if a method exist in type
final MethodMetadata method = helper.methodExists(methodName,
parameterTypes);
if (method != null) {
// If it already exists, just return the method
return method;
}
// Define method annotations (none in this case)
List<AnnotationMetadataBuilder> annotations = new ArrayList<AnnotationMetadataBuilder>();
// Define method throws types (none in this case)
List<JavaType> throwsTypes = new ArrayList<JavaType>();
// Define method parameter names (none in this case)
List<JavaSymbolName> parameterNames = new ArrayList<JavaSymbolName>();
// Create the method body
InvocableMemberBodyBuilder bodyBuilder = new InvocableMemberBodyBuilder();
buildGetUserMethodBody(bodyBuilder);
// Use the MethodMetadataBuilder for easy creation of MethodMetadata
MethodMetadataBuilder methodBuilder = new MethodMetadataBuilder(
getId(), Modifier.PUBLIC + Modifier.STATIC, methodName,
userType, parameterTypes, parameterNames, bodyBuilder);
methodBuilder.setAnnotations(annotations);
methodBuilder.setThrowsTypes(throwsTypes);
return methodBuilder.build(); // Build and return a MethodMetadata
}
/**
* Build getUserName method code
* <p/>
* Generated code is dependent on Spring Security is configured or not
*
* @param bodyBuilder
*/
private void buildGetUserMethodBody(InvocableMemberBodyBuilder bodyBuilder) {
if (!isSpringSecurityInstalled) {
bodyBuilder.appendFormalLine("// TODO identify user");
bodyBuilder.appendFormalLine("return null;");
}
else {
// Authentication auth =
// SecurityContextHolder.getContext().getAuthentication();
bodyBuilder.appendFormalLine(String.format(
"%s auth = %s.getContext().getAuthentication();",
getFinalTypeName(SEC_AUTHENTICATION),
getFinalTypeName(SEC_SECURITY_CONTEXT_HOLDER)));
// if (auth == null || !auth.isAuthenticated()) {
bodyBuilder
.appendFormalLine("if (auth == null || !auth.isAuthenticated()) {");
bodyBuilder.indent();
// return null;
bodyBuilder.appendFormalLine("return null;");
// }
bodyBuilder.indentRemove();
bodyBuilder.appendFormalLine("}");
if (JavaType.STRING.equals(userType)) {
// return auth.getName();
bodyBuilder.appendFormalLine("return auth.getName();");
}
else if (isUserDetails) {
// return (UserDetails)auth.getName();
bodyBuilder.appendFormalLine(String.format("return (%s)auth;",
helper.getFinalTypeName(userType)));
}
else {
bodyBuilder.appendFormalLine("// return ????;");
bodyBuilder.appendFormalLine(String.format(
"throw new %s(\"Missing implementation here!!!!\");",
helper.getFinalTypeName(ILLEGAL_STATUS_EXCEPTION)));
}
}
}
/**
* @return name of getUser() method
*/
public JavaSymbolName getUserMethodName() {
return GET_USER_METHOD;
}
public String toString() {
final ToStringBuilder builder = new ToStringBuilder(this);
builder.append("identifier", getId());
builder.append("valid", valid);
builder.append("aspectName", aspectName);
builder.append("destinationType", destination);
builder.append("governor", governorPhysicalTypeMetadata.getId());
builder.append("itdTypeDetails", itdTypeDetails);
return builder.toString();
}
/**
* Gets final names to use of a type in method body after import resolver.
*
* @param type
* @return name to use in method body
*/
private String getFinalTypeName(JavaType type) {
return type.getNameIncludingTypeParameters(false,
builder.getImportRegistrationResolver());
}
/**
* @return annotation values
*/
public JpaAuditUserServiceAnnotationValues getAnnotationValues() {
return annotationValues;
}
/**
* @return type to use for audit user fields
*/
public JavaType userType() {
return userType;
}
/**
* @return the isUserDetails
*/
public boolean isUserTypeSpringSecUserDetails() {
return isUserDetails;
}
/**
* @return the isUserEntity
*/
public boolean isUserTypeEntity() {
return isUserEntity;
}
/**
* @return the usePatternForDate
*/
public boolean usePatternForTimestamp() {
return usePatternForDate;
}
/**
* @return the dateTimePattern
*/
public String getPatternForTimestamp() {
return dateTimePattern;
}
/**
* @return the dateTimeStyle
*/
public String getTimestampStyle() {
return dateTimeStyle;
}
}