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/*
* Copyright (c) 2014, Oracle and/or its affiliates. All rights reserved.
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
*
* This code is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License version 2 only, as
* published by the Free Software Foundation.
*
* This code 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 General Public License
* version 2 for more details (a copy is included in the LICENSE file that
* accompanied this code).
*
* You should have received a copy of the GNU General Public License version
* 2 along with this work; if not, write to the Free Software Foundation,
* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
*
* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
* or visit www.oracle.com if you need additional information or have any
* questions.
*/
package propertiesparser.parser;
import propertiesparser.parser.MessageType.CompoundType;
import propertiesparser.parser.MessageType.OrType;
import propertiesparser.parser.MessageType.SimpleType;
import propertiesparser.parser.MessageType.UnionType;
import java.util.ArrayList;
import java.util.List;
/**
* An object to represent the comment that may precede the property
* specification in a Message.
* The comment is modelled as a list of fields, where the fields correspond
* to the placeholder values (e.g. {0}, {1}, etc) within the message value.
*/
public final class MessageInfo {
/** The fields of the Info object. */
List<MessageType> types = new ArrayList<>();
MessageInfo(String text) throws IllegalArgumentException {
if (text != null) {
if (!text.startsWith("# "))
throw new IllegalArgumentException();
String[] segs = text.substring(2).split(", ");
types = new ArrayList<>();
for (String seg : segs) {
types.add(parseType(seg));
}
}
}
public List<MessageType> getTypes() {
return types;
}
boolean isEmpty() {
return types.isEmpty();
}
@Override
public String toString() {
return types.toString();
}
/**
* Split the type comment into multiple alternatives (separated by 'or') - then parse each of them
* individually and form an 'or' type.
*/
MessageType parseType(String text) {
int commentStart = text.indexOf("(");
if (commentStart != -1) {
//remove optional comment
text = text.substring(0, commentStart);
}
text = text.substring(text.indexOf(": ") + 2);
String[] alternatives = text.split(" " + OrType.OR_NAME + " ");
MessageType[] types = new MessageType[alternatives.length];
for (int i = 0 ; i < alternatives.length ; i++) {
types[i] = parseAlternative(alternatives[i].trim());
}
return types.length > 1 ?
new OrType(types) : types[0];
}
/**
* Parse a subset of the type comment; valid matches are simple types, compound types,
* union types and custom types.
*/
MessageType parseAlternative(String text) {
//try with custom types
if (text.charAt(0) == '\'') {
int end = text.indexOf('\'', 1);
return new MessageType.CustomType(text.substring(1, end));
}
//try with simple types
for (SimpleType st : SimpleType.values()) {
if (text.equals(st.kindName())) {
return st;
}
}
//try with compound types
for (CompoundType.Kind ck : CompoundType.Kind.values()) {
if (text.startsWith(ck.kindName)) {
MessageType elemtype = parseAlternative(text.substring(ck.kindName.length() + 1).trim());
return new CompoundType(ck, elemtype);
}
}
//try with union types
for (UnionType.Kind uk : UnionType.Kind.values()) {
if (text.startsWith(uk.kindName)) {
return new UnionType(uk);
}
}
//no match - report a warning
System.err.println("WARNING - unrecognized type: " + text);
return SimpleType.UNKNOWN;
}
/** Dummy message info to be used when no resource key comment is available. */
static final MessageInfo dummyInfo = new MessageInfo(null);
}
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