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Refactor to avoid logic duplication on the property value -> string conversion 

git-svn-id: https://svn.apache.org/repos/asf/poi/trunk@1499329 13f79535-47bb-0310-9956-ffa450edef68
This commit is contained in:
Nick Burch 2013-07-03 11:36:11 +00:00
parent fb8d0c1076
commit 7cc22dd3c1
2 changed files with 28 additions and 41 deletions
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29
src/java/org/apache/poi/hpsf/SpecialPropertySet.java
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@ -51,17 +51,14 @@ import org.apache.poi.util.LittleEndian;
* general {@link PropertySet}. However, the current implementation
* went the other way round historically: the convenience classes came
* only late to my mind.</p>
*
* @author Rainer Klute <a
* href="mailto:klute@rainer-klute.de">&lt;klute@rainer-klute.de&gt;</a>
*/
public abstract class SpecialPropertySet extends MutablePropertySet
{
/**
* The id to name mapping of the properties
* in this set.
*/
public abstract PropertyIDMap getPropertySetIDMap();
/**
* The id to name mapping of the properties
* in this set.
*/
public abstract PropertyIDMap getPropertySetIDMap();
/**
* <p>The "real" property set <code>SpecialPropertySet</code>
@ -332,15 +329,17 @@ public abstract class SpecialPropertySet extends MutablePropertySet
* @return The property as a String, or null if unavailable
*/
protected String getPropertyStringValue(final int propertyId) {
Object o = getProperty(propertyId);
Object propertyValue = getProperty(propertyId);
return getPropertyStringValue(propertyValue);
}
protected static String getPropertyStringValue(final Object propertyValue) {
// Normal cases
if (o == null) return null;
if (o instanceof String) return (String)o;
if (propertyValue == null) return null;
if (propertyValue instanceof String) return (String)propertyValue;
// Do our best with some edge cases
if (o instanceof byte[]) {
byte[] b = (byte[])o;
if (propertyValue instanceof byte[]) {
byte[] b = (byte[])propertyValue;
if (b.length == 0) {
return "";
}
@ -356,7 +355,7 @@ public abstract class SpecialPropertySet extends MutablePropertySet
// Maybe it's a string? who knows!
return new String(b);
}
return o.toString();
return propertyValue.toString();
}

40
src/java/org/apache/poi/hpsf/extractor/HPSFPropertiesExtractor.java
View File

@ -32,7 +32,6 @@ import org.apache.poi.hpsf.SummaryInformation;
import org.apache.poi.hpsf.wellknown.PropertyIDMap;
import org.apache.poi.poifs.filesystem.NPOIFSFileSystem;
import org.apache.poi.poifs.filesystem.POIFSFileSystem;
import org.apache.poi.util.LittleEndian;
/**
* Extracts all of the HPSF properties, both
@ -66,7 +65,7 @@ public class HPSFPropertiesExtractor extends POITextExtractor {
Iterator<String> keys = cps.nameSet().iterator();
while (keys.hasNext()) {
String key = keys.next();
String val = getPropertyValueText( cps.get(key) );
String val = HelperPropertySet.getPropertyValueText( cps.get(key) );
text.append(key + " = " + val + "\n");
}
}
@ -98,35 +97,12 @@ public class HPSFPropertiesExtractor extends POITextExtractor {
type = typeObj.toString();
}
String val = getPropertyValueText( props[i].getValue() );
String val = HelperPropertySet.getPropertyValueText( props[i].getValue() );
text.append(type + " = " + val + "\n");
}
return text.toString();
}
private static String getPropertyValueText(Object val) {
if (val == null) {
return "(not set)";
}
if (val instanceof byte[]) {
byte[] b = (byte[])val;
if (b.length == 0) {
return "";
}
if (b.length == 1) {
return Byte.toString(b[0]);
}
if (b.length == 2) {
return Integer.toString( LittleEndian.getUShort(b) );
}
if (b.length == 4) {
return Long.toString( LittleEndian.getUInt(b) );
}
// Maybe it's a string? who knows!
return new String(b);
}
return val.toString();
}
/**
* @return the text of all the properties defined in
@ -142,6 +118,18 @@ public class HPSFPropertiesExtractor extends POITextExtractor {
public POITextExtractor getMetadataTextExtractor() {
throw new IllegalStateException("You already have the Metadata Text Extractor, not recursing!");
}
private static abstract class HelperPropertySet extends SpecialPropertySet {
public HelperPropertySet() {
super(null);
}
public static String getPropertyValueText(Object val) {
if (val == null) {
return "(not set)";
}
return SpecialPropertySet.getPropertyStringValue(val);
}
}
public static void main(String[] args) throws IOException {
for (String file : args) {