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JSR 380's RI, Hibernate Validator version ${hibernate-validator.version} and its dependencies repackaged as OSGi bundle
/*
* Hibernate Validator, declare and validate application constraints
*
* License: Apache License, Version 2.0
* See the license.txt file in the root directory or .
*/
package org.hibernate.validator.internal.engine.messageinterpolation.parser;
import java.util.regex.Matcher;
import java.util.regex.Pattern;
/**
* Parsing a message descriptor results in multiple {@code Token}s. Each token
* keeps track of its token value and whether the token is a parameter which can
* be interpolated.
*
* Note, tokens are not centred around word delimiters, but rather around message parameter and EL expressions.
* For example, the message descriptor "must be between {min} and {max}" gets parsed into the tokens 'must be between ',
* '{min}', ' and ', '{max}', where the min and max tokens are parameters.
*
* @author Hardy Ferentschik
*/
public class Token {
private static final Pattern ESCAPED_OPENING_CURLY_BRACE = Pattern.compile( "\\\\\\{" );
private static final Pattern ESCAPED_CLOSING_CURLY_BRACE = Pattern.compile( "\\\\\\}" );
private boolean isParameter;
private boolean isEL;
private boolean terminated;
private String value;
private StringBuilder builder;
public Token(String tokenStart) {
builder = new StringBuilder();
builder.append( tokenStart );
}
public Token(char tokenStart) {
this( String.valueOf( tokenStart ) );
}
public void append(char character) {
builder.append( character );
}
public void makeParameterToken() {
isParameter = true;
}
public void makeELToken() {
makeParameterToken();
isEL = true;
}
public void terminate() {
value = builder.toString();
if ( isEL ) {
// HV-834 curly braces need to be un-escaped prior to be passed to the EL engine
Matcher matcher = ESCAPED_OPENING_CURLY_BRACE.matcher( value );
value = matcher.replaceAll( "{" );
matcher = ESCAPED_CLOSING_CURLY_BRACE.matcher( value );
value = matcher.replaceAll( "}" );
}
builder = null;
terminated = true;
}
public boolean isParameter() {
return isParameter;
}
public String getTokenValue() {
if ( !terminated ) {
throw new IllegalStateException( "Trying to retrieve token value for unterminated token" );
}
return value;
}
@Override
public String toString() {
final StringBuilder sb = new StringBuilder( "Token{" );
sb.append( "value='" ).append( value ).append( '\'' );
sb.append( ", terminated=" ).append( terminated );
sb.append( ", isEL=" ).append( isEL );
sb.append( ", isParameter=" ).append( isParameter );
sb.append( '}' );
return sb.toString();
}
}