/*
* JBoss, Home of Professional Open Source.
* Copyright 2012, Red Hat, Inc., and individual contributors
* as indicated by the @author tags. See the copyright.txt file in the
* distribution for a full listing of individual contributors.
*
* This is free software; you can redistribute it and/or modify it
* under the terms of the GNU Lesser General Public License as
* published by the Free Software Foundation; either version 2.1 of
* the License, or (at your option) any later version.
*
* This software 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
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this software; if not, write to the Free
* Software Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
* 02110-1301 USA, or see the FSF site: http://www.fsf.org.
*/
package org.richfaces.cdk.templatecompiler.el.types;
import java.util.regex.Matcher;
import java.util.regex.Pattern;
import org.richfaces.cdk.util.ArrayUtils;
import com.google.inject.Inject;
/**
* Provides functionality to parse the name of the class and infer the simple class name, type arguments and decide if type is
* array.
*
* @author Lukas Fryc
*/
public class TypeParser {
private static final Pattern CLASS_SIGNATURE_PATTERN = Pattern.compile("^" + "\\s*([^\\[<]+)\\s*" + // class name
"(?:<\\s*(.*)\\s*>)?\\s*" + // generic signature
"((?:\\[\\s*\\]\\s*)+)?\\s*" + // array signature
"$");
private static final int CLASS_NAME_GROUP_IDX = 1;
private static final int TYPE_ARGUMENTS_GROUP_IDX = 2;
private static final int ARRAY_SIGNATURE_GROUP_IDX = 3;
private static final int ARRAY_SIGNATURE_LENGTH = "[]".length();
@Inject
TypesFactory typesFactory;
private Matcher matcher;
public TypeParser(String typeString) {
matcher = CLASS_SIGNATURE_PATTERN.matcher(typeString);
}
public boolean isParseable() {
return matcher.matches();
}
public ELType[] getTypeArguments() {
String typeArgumentsString = matcher.group(TYPE_ARGUMENTS_GROUP_IDX);
return parseTypeArgumentsString(typeArgumentsString);
}
private ELType[] parseTypeArgumentsString(String typeArguments) {
if (typeArguments == null) {
return PlainClassType.NO_TYPES;
}
String[] typeArgumentsSplit = typeArguments.trim().split(",");
ELType[] types = new ELType[typeArgumentsSplit.length];
for (int i = 0; i < typeArgumentsSplit.length; i++) {
types[i] = typesFactory.getType(typeArgumentsSplit[i]);
}
return types;
}
public boolean isArray() {
return getArrayDepth() != 0 || !ArrayUtils.isEmpty(getTypeArguments());
}
public int getArrayDepth() {
String arraySignature = matcher.group(ARRAY_SIGNATURE_GROUP_IDX);
int arrayDepth = 0;
if (arraySignature != null) {
arrayDepth = arraySignature.replaceAll("\\s+", "").length() / ARRAY_SIGNATURE_LENGTH;
}
return arrayDepth;
}
public String getClassName() {
return matcher.group(CLASS_NAME_GROUP_IDX).trim();
}
}