X-Git-Url: https://gitweb.fperrin.net/?p=GpsPrune.git;a=blobdiff_plain;f=src%2Ftim%2Fprune%2Fload%2FGenericFileFilter.java;fp=src%2Ftim%2Fprune%2Fload%2FGenericFileFilter.java;h=733dee65e214f11e25b7816f1d9c2eca9a8e9b4b;hp=0000000000000000000000000000000000000000;hb=ce6f2161b8596f7018d6a76bff79bc9e571f35fd;hpb=2d8cb72e84d5cc1089ce77baf1e34ea3ea2f8465

diff --git a/src/tim/prune/load/GenericFileFilter.java b/src/tim/prune/load/GenericFileFilter.java
new file mode 100644
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--- /dev/null
+++ b/src/tim/prune/load/GenericFileFilter.java
@@ -0,0 +1,120 @@
+package tim.prune.load;
+
+import java.io.File;
+import javax.swing.filechooser.FileFilter;
+
+import tim.prune.I18nManager;
+
+/**
+ * Class to act as a generic file filter based on file extension
+ */
+public class GenericFileFilter extends FileFilter
+{
+	/** Filter description for display */
+	private String _filterDesc = null;
+	/** Array of allowed three-character suffixes */
+	private String[] _threeCharSuffixes = null;
+	/** Array of allowed four-character suffixes */
+	private String[] _fourCharSuffixes = null;
+
+
+	/**
+	 * Constructor
+	 * @param inDescKey key for filter description
+	 * @param inSuffixes array of allowed 3- and 4-character file suffixes
+	 */
+	public GenericFileFilter(String inDescKey, String[] inSuffixes)
+	{
+		_filterDesc = I18nManager.getText(inDescKey);
+		if (inSuffixes != null && inSuffixes.length > 0)
+		{
+			_threeCharSuffixes = new String[inSuffixes.length];
+			_fourCharSuffixes = new String[inSuffixes.length];
+			int threeIndex = 0, fourIndex = 0;
+			for (String suffix : inSuffixes)
+			{
+				if (suffix != null)
+				{
+					suffix = suffix.trim().toLowerCase();
+					if (suffix.length() == 3) {
+						_threeCharSuffixes[threeIndex++] = suffix;
+					}
+					else if (suffix.length() == 4) {
+						_fourCharSuffixes[fourIndex++] = suffix;
+					}
+				}
+			}
+		}
+	}
+
+	/**
+	 * Check whether to accept the specified file or not
+	 * @see javax.swing.filechooser.FileFilter#accept(java.io.File)
+	 */
+	public boolean accept(File inFile)
+	{
+		return inFile.isDirectory() || acceptFilename(inFile.getName());
+	}
+
+	/**
+	 * Check whether to accept the given filename
+	 * @param inName name of file
+	 * @return true if accepted, false otherwise
+	 */
+	public boolean acceptFilename(String inName)
+	{
+		if (inName != null)
+		{
+			final int nameLen = inName.length();
+			if (nameLen > 4)
+			{
+				// Check for three character suffixes
+				char currChar = inName.charAt(nameLen - 4);
+				if (currChar == '.')
+				{
+					return acceptFilename(inName.substring(nameLen - 3).toLowerCase(), _threeCharSuffixes);
+				}
+				// check for four character suffixes
+				currChar = inName.charAt(nameLen - 5);
+				if (currChar == '.')
+				{
+					return acceptFilename(inName.substring(nameLen - 4).toLowerCase(), _fourCharSuffixes);
+				}
+			}
+		}
+		// Not matched so don't accept
+		return false;
+	}
+
+	/**
+	 * Check whether to accept the given filename
+	 * @param inSuffixToCheck suffix to check
+	 * @param inAllowedSuffixes array of allowed suffixes
+	 * @return true if accepted, false otherwise
+	 */
+	private static boolean acceptFilename(String inSuffixToCheck, String[] inAllowedSuffixes)
+	{
+		if (inSuffixToCheck != null && inAllowedSuffixes != null)
+		{
+			// Loop over allowed suffixes
+			for (String allowed : inAllowedSuffixes)
+			{
+				if (allowed != null && inSuffixToCheck.equals(allowed)) {
+					return true;
+				}
+			}
+		}
+		// Fallen through so not allowed
+		return false;
+	}
+
+
+	/**
+	 * Get description
+	 * @see javax.swing.filechooser.FileFilter#getDescription()
+	 */
+	public String getDescription()
+	{
+		return _filterDesc;
+	}
+}