Main.java Source code

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Here is the source code for Main.java

Source

//package com.java2s;
/**
 * Copyright (C) 2005-2009 Alfresco Software Limited.
 *
 * This file is part of the Spring Surf Extension project.
 *
 * Licensed 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.
 */

import java.io.IOException;
import java.io.OutputStream;
import java.io.OutputStreamWriter;
import java.io.UnsupportedEncodingException;
import java.io.Writer;

import javax.xml.transform.OutputKeys;
import javax.xml.transform.Transformer;
import javax.xml.transform.TransformerFactory;
import javax.xml.transform.dom.DOMSource;
import javax.xml.transform.stream.StreamResult;

import org.springframework.util.Assert;
import org.w3c.dom.Document;

public class Main {
    private static final TransformerFactory transformerFactory = TransformerFactory.newInstance();

    public static final void writeXml(OutputStream outputEntry, Document document) {
        writeXml(createIndentingTransformer(), outputEntry, document);
    }

    public static final void writeXml(Transformer transformer, OutputStream outputEntry, Document document) {
        Assert.notNull(transformer, "Transformer required");
        Assert.notNull(outputEntry, "Output entry required");
        Assert.notNull(document, "Document required");

        transformer.setOutputProperty(OutputKeys.METHOD, "xml");

        try {
            transformer.transform(new DOMSource(document), createUnixStreamResultForEntry(outputEntry));
        } catch (Exception ex) {
            throw new IllegalStateException(ex);
        }
    }

    /**
     * @return a transformer that indents entries by 4 characters (never null)
     */
    public static final Transformer createIndentingTransformer() {
        Transformer xformer;
        try {
            xformer = transformerFactory.newTransformer();
        } catch (Exception ex) {
            throw new IllegalStateException(ex);
        }
        xformer.setOutputProperty(OutputKeys.INDENT, "yes");
        xformer.setOutputProperty("{http://xml.apache.org/xslt}indent-amount", "4");
        return xformer;
    }

    /**
     * Creates a {@link StreamResult} by wrapping the given outputEntry in an
     * {@link OutputStreamWriter} that transforms Windows line endings (\r\n) 
     * into Unix line endings (\n) on Windows for consistency with Roo's templates.  
     * @param outputEntry
     * @return StreamResult 
     * @throws UnsupportedEncodingException 
     */
    private static StreamResult createUnixStreamResultForEntry(OutputStream outputEntry)
            throws UnsupportedEncodingException {
        final Writer writer;
        if (System.getProperty("line.separator").equals("\r\n")) {
            writer = new OutputStreamWriter(outputEntry, "ISO-8859-1") {
                public void write(char[] cbuf, int off, int len) throws IOException {
                    for (int i = off; i < off + len; i++) {
                        if (cbuf[i] != '\r' || (i < cbuf.length - 1 && cbuf[i + 1] != '\n')) {
                            super.write(cbuf[i]);
                        }
                    }
                }

                public void write(int c) throws IOException {
                    if (c != '\r')
                        super.write(c);
                }

                public void write(String str, int off, int len) throws IOException {
                    String orig = str.substring(off, off + len);
                    String filtered = orig.replace("\r\n", "\n");
                    int lengthDiff = orig.length() - filtered.length();
                    if (filtered.endsWith("\r")) {
                        super.write(filtered.substring(0, filtered.length() - 1), 0, len - lengthDiff - 1);
                    } else {
                        super.write(filtered, 0, len - lengthDiff);
                    }
                }
            };
        } else {
            writer = new OutputStreamWriter(outputEntry, "ISO-8859-1");
        }
        return new StreamResult(writer);
    }
}