/**
* Copyright 2011-2017 Asakusa Framework Team.
*
* 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 com.asakusafw.utils.java.internal.model.syntax;
import java.text.MessageFormat;
import com.asakusafw.utils.java.internal.model.util.LiteralAnalyzer;
import com.asakusafw.utils.java.internal.model.util.LiteralToken;
import com.asakusafw.utils.java.model.syntax.Literal;
import com.asakusafw.utils.java.model.syntax.LiteralKind;
import com.asakusafw.utils.java.model.syntax.ModelKind;
import com.asakusafw.utils.java.model.syntax.Visitor;
/**
* An implementation of {@link Literal}.
*/
public final class LiteralImpl extends ModelRoot implements Literal {
private String token;
private LiteralKind literalKind;
@Override
public String getToken() {
return this.token;
}
/**
* Sets the literal token.
* @param token the literal token
* @throws IllegalArgumentException if {@code token} was {@code null}
* @throws IllegalArgumentException if {@code token} was empty
*/
public void setToken(String token) {
Util.notNull(token, "token"); //$NON-NLS-1$
LiteralKind kind = computeLiteralKind(token);
if (kind == null) {
throw new IllegalArgumentException(MessageFormat.format(
"Invalid literal token: {0}", //$NON-NLS-1$
LiteralAnalyzer.stringLiteralOf(token)));
}
this.token = token;
this.literalKind = kind;
}
private static LiteralKind computeLiteralKind(String tokenString) {
LiteralToken token = LiteralAnalyzer.parse(tokenString);
switch (token.getKind()) {
case INT: return LiteralKind.INT;
case LONG: return LiteralKind.LONG;
case FLOAT: return LiteralKind.FLOAT;
case DOUBLE: return LiteralKind.DOUBLE;
case CHAR: return LiteralKind.CHAR;
case STRING: return LiteralKind.STRING;
case BOOLEAN: return LiteralKind.BOOLEAN;
case NULL: return LiteralKind.NULL;
default:
return null;
}
}
@Override
public LiteralKind getLiteralKind() {
return literalKind;
}
/**
* Returns {@link ModelKind#LITERAL} which represents this element kind.
* @return {@link ModelKind#LITERAL}
*/
@Override
public ModelKind getModelKind() {
return ModelKind.LITERAL;
}
@Override
public <R, C, E extends Throwable> R accept(Visitor<R, C, E> visitor, C context) throws E {
Util.notNull(visitor, "visitor"); //$NON-NLS-1$
return visitor.visitLiteral(this, context);
}
}