/*
* Copyright 2009-2016 the original author or authors.
*
* 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.codehaus.groovy.eclipse.core.util;
import java.io.Serializable;
/**
* Tokens recognized for an expression.
*
* @author empovazan
*/
public class Token implements Serializable {
private static final long serialVersionUID = 384520235046067298L;
public enum Type {
EOF,
/** [0-9a-zA-Z_'"]* Note, can start with [0-9] */
IDENT,
DOT,
SEMI,
/** Any quoted string, single and triple */
QUOTED_STRING,
/** '(' anything ')' */
PAREN_BLOCK,
/** '{' anything '}' */
BRACE_BLOCK,
/** '[' anything ']' */
BRACK_BLOCK,
/** '//' */
LINE_COMMENT,
/** '/star ... star/' */
BLOCK_COMMENT,
/** '\n', '\r', '\n\r', '\r\n' */
LINE_BREAK,
/** range definition 10..23, 10..<23 */
DOUBLE_DOT,
/** safe navigation operator ?. */
SAFE_DEREF,
/** spread operator *. */
SPREAD,
/** direct field access .@ */
FIELD_ACCESS,
/** method pointer .& */
METHOD_POINTER,
}
private final int type;
public final int startOffset;
public final int endOffset;
public final String text;
public Token(Type type, int startOffset, int endOffset, String text) {
this.type = type.ordinal();
this.startOffset = startOffset;
this.endOffset = endOffset;
this.text = text;
}
public Type getType() {
return Type.values()[type];
}
public boolean isType(Type t) {
return getType() == t;
}
public boolean isDotAccess() {
switch (getType()) {
case DOT:
case SAFE_DEREF:
case SPREAD:
case FIELD_ACCESS:
case METHOD_POINTER:
return true;
default:
return false;
}
}
public boolean isValidBeforeDot() {
switch (getType()) {
case IDENT:
case QUOTED_STRING:
case BRACE_BLOCK:
case BRACK_BLOCK:
case PAREN_BLOCK:
return true;
default:
return false;
}
}
public boolean equals(Object that) {
if (that == this) return true;
if (!(that instanceof Token)) return false;
return ((Token) that).type == this.type;
}
public int hashCode() {
return getType().hashCode() + type;
}
public String toString() {
return getType() + "[" + startOffset + ":" + endOffset + "] - " + text;
}
}