| /* |
| * Copyright (c) 2011 Google Inc. |
| * |
| * All rights reserved. This program and the accompanying materials are made available under the terms of the Eclipse |
| * Public License v1.0 which accompanies this distribution, and is available at |
| * |
| * http://www.eclipse.org/legal/epl-v10.html |
| */ |
| package com.google.eclipse.protobuf.conversion; |
| |
| import static com.google.eclipse.protobuf.util.Strings.*; |
| import static org.eclipse.xtext.util.Strings.convertToJavaString; |
| |
| import org.eclipse.xtext.conversion.ValueConverterException; |
| import org.eclipse.xtext.conversion.impl.AbstractLexerBasedConverter; |
| import org.eclipse.xtext.nodemodel.INode; |
| |
| import com.google.common.base.Function; |
| |
| /** |
| * Converts multi-line strings to {@code String}s. |
| * |
| * @author alruiz@google.com (Alex Ruiz) |
| */ |
| public class STRINGValueConverter extends AbstractLexerBasedConverter<String> { |
| @Override protected String toEscapedString(String value) { |
| if (value == null) { |
| return null; |
| } |
| // TODO check if we really need to quote |
| return '"' + toValue(value) + '"'; |
| } |
| |
| /** |
| * Creates a {@code String} from the given input, if the given input represents a multiple-line string. |
| * @param string the given input. |
| * @param node the parsed node including hidden parts. |
| * @return the new {@code String}. |
| * @throws ValueConverterException if the given input has illegal characters. |
| */ |
| @Override public String toValue(String string, INode node) throws ValueConverterException { |
| if (string == null) { |
| return null; |
| } |
| try { |
| return toValue(string); |
| } catch (RuntimeException e) { |
| throw parsingError(string, node, e); |
| } |
| } |
| |
| private String toValue(String string) { |
| return removeLineBreaks(string, LineTransformation.INSTANCE); |
| } |
| |
| private ValueConverterException parsingError(String string, INode node, Exception cause) { |
| return new ValueConverterException("Couldn't convert '" + string + "' to String.", node, cause); |
| } |
| |
| private static class LineTransformation implements Function<String, String> { |
| private static final LineTransformation INSTANCE = new LineTransformation(); |
| |
| @Override public String apply(String input) { |
| return convertToJavaString(unquote(input), true); |
| } |
| } |
| } |