/*
*
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright ownership.
* The ASF licenses this file to You 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.apache.flex.compiler.internal.tree.as;
import java.util.ArrayList;
import java.util.Collections;
import java.util.EnumSet;
import java.util.Set;
import org.apache.flex.compiler.common.ISourceLocation;
import org.apache.flex.compiler.common.SourceLocation;
import org.apache.flex.compiler.internal.parsing.as.ASToken;
import org.apache.flex.compiler.internal.parsing.as.IProblemReporter;
import org.apache.flex.compiler.problems.ICompilerProblem;
import org.apache.flex.compiler.problems.SyntaxProblem;
import org.apache.flex.compiler.tree.ASTNodeID;
import org.apache.flex.compiler.tree.as.IRegExpLiteralNode;
public class RegExpLiteralNode extends LiteralNode implements IRegExpLiteralNode
{
private static final Set<RegExpFlag> EMPTY_SET = Collections.emptySet();
/**
* Constructor.
*
* @param t The token representing the RegExp literal.
* @param reporter The object used for reporting compiler problems.
*/
public RegExpLiteralNode(ASToken t, IProblemReporter reporter)
{
super(t, LiteralType.REGEXP);
// Process for flags.
ArrayList<RegExpFlag> flags = new ArrayList<RegExpFlag>(5);
boolean cont = true;
for (int i = value.length() - 1; i >= 0 && cont; i--)
{
char charAt = value.charAt(i);
switch (charAt)
{
case 'm':
{
flags.add(RegExpFlag.MULTILINE);
break;
}
case 's':
{
flags.add(RegExpFlag.DOTALL);
break;
}
case 'g':
{
flags.add(RegExpFlag.GLOBAL);
break;
}
case 'i':
{
flags.add(RegExpFlag.IGNORECASE);
break;
}
case 'x':
{
flags.add(RegExpFlag.EXTENDED);
break;
}
case '/':
{
cont = false;
break;
}
default:
{
// Add an error if the flag is not valid.
ISourceLocation location = new SourceLocation(getSourcePath(),
getStart() + i, getStart() + i + 1, getLine(), getColumn());
ICompilerProblem problem = new SyntaxProblem(location, Character.toString(charAt));
reporter.addProblem(problem);
break;
}
}
}
if (flags.size() > 0)
this.flags = EnumSet.copyOf(flags);
}
/**
* Copy constructor.
*
* @param other The node to copy.
*/
protected RegExpLiteralNode(RegExpLiteralNode other)
{
super(other);
this.flags = other.flags;
}
/**
* Flags collected on this regular expression
*/
private EnumSet<RegExpFlag> flags;
//
// NodeBase overrides
//
@Override
public ASTNodeID getNodeID()
{
return ASTNodeID.LiteralRegexID;
}
//
// ExpressionNodeBase overrides
//
@Override
protected RegExpLiteralNode copy()
{
return new RegExpLiteralNode(this);
}
//
// LiteralNode overrides
//
@Override
public String getValue()
{
return getValue(false);
}
@Override
public String getValue(boolean rawValue)
{
String retVal = value;
if (rawValue || retVal == null)
return retVal;
return retVal.substring(1, retVal.lastIndexOf("/"));
}
//
// IRegExpLiteralNode implementations
//
@Override
public Set<RegExpFlag> getFlags()
{
return flags != null ? flags : EMPTY_SET;
}
@Override
public String getFlagString()
{
if (flags == null)
return "";
StringBuilder sb = new StringBuilder();
for (RegExpFlag f : flags)
{
sb.append(f.getCode());
}
return sb.toString();
}
@Override
public boolean hasFlag(RegExpFlag flag)
{
return flags != null && flags.contains(flag);
}
}