IdentifierUtils.java

/*
 * Copyright 2012 Red Hat, Inc. and/or its affiliates.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *       http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package org.guvnor.common.services.project.backend.server.utils;

import javax.lang.model.SourceVersion;

/**
 * Utilities to manipulate Java/Maven identifiers
 */
public class IdentifierUtils {

    /**
     * Convert Maven Identifiers to equivalents compatible with Java
     * @param identifiers
     * @return
     */
    public static String[] convertMavenIdentifierToJavaIdentifier( final String[] identifiers ) {
        if ( identifiers == null || identifiers.length < 1 ) {
            return new String[ 0 ];
        }
        final String[] legalIdentifiers = new String[ identifiers.length ];
        for ( int idx = 0; idx < identifiers.length; idx++ ) {
            final String identifier = identifiers[ idx ];
            final StringBuilder legalIdentifier = new StringBuilder( "" );
            Character c = identifier.charAt( 0 );
            if ( !Character.isJavaIdentifierStart( c ) ) {
                legalIdentifier.append( "_" );
            } else {
                legalIdentifier.append( c );
            }
            for ( int i = 1; i < identifier.length(); i++ ) {
                c = identifier.charAt( i );
                if ( Character.isJavaIdentifierPart( c ) ) {
                    legalIdentifier.append( c );
                } else {
                    legalIdentifier.append( "_" );
                }
            }
            if ( SourceVersion.isKeyword( legalIdentifier.toString() ) ) {
                legalIdentifier.insert( 0,
                                        "_" );
            }
            legalIdentifiers[ idx ] = legalIdentifier.toString();
        }
        return legalIdentifiers;
    }

}