Example usage for org.apache.poi.hpsf PropertySet isPropertySetStream

Introduction

In this page you can find the example usage for org.apache.poi.hpsf PropertySet isPropertySetStream.

Prototype

public static boolean isPropertySetStream(final InputStream stream) throws IOException 

Source Link

Document

Checks whether an InputStream is in the Horrible Property Set Format.

Usage

From source file:poi.hpsf.examples.CopyCompare.java

License:Apache License

/**
 * <p>Compares two {@link DocumentEntry} instances of a POI file system.
 * Documents that are not property set streams must be bitwise identical.
 * Property set streams must be logically equal.</p>
 *
 * @param d1 The first document./*from  w  w  w.ja  va2 s  .  com*/
 * @param d2 The second document.
 * @param msg The method may append human-readable comparison messages to
 * this string buffer.
 * @return <code>true</code> if the documents are equal, else
 * <code>false</code>.
 * @exception MarkUnsupportedException if a POI document stream does not
 * support the mark() operation.
 * @exception NoPropertySetStreamException if the application tries to
 * create a property set from a POI document stream that is not a property
 * set stream.
 * @throws java.io.UnsupportedEncodingException
 * @exception java.io.IOException if any I/O exception occurs.
 */
private static boolean equal(final DocumentEntry d1, final DocumentEntry d2, final StringBuffer msg)
        throws NoPropertySetStreamException, MarkUnsupportedException, UnsupportedEncodingException,
        IOException {
    boolean equal = true;
    final DocumentInputStream dis1 = new DocumentInputStream(d1);
    final DocumentInputStream dis2 = new DocumentInputStream(d2);
    if (PropertySet.isPropertySetStream(dis1) && PropertySet.isPropertySetStream(dis2)) {
        final PropertySet ps1 = PropertySetFactory.create(dis1);
        final PropertySet ps2 = PropertySetFactory.create(dis2);
        equal = ps1.equals(ps2);
        if (!equal) {
            msg.append("Property sets are not equal.\n");
            return equal;
        }
    } else {
        int i1;
        int i2;
        do {
            i1 = dis1.read();
            i2 = dis2.read();
            if (i1 != i2) {
                equal = false;
                msg.append("Documents are not equal.\n");
                break;
            }
        } while (equal && i1 == -1);
    }
    return true;
}

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