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