1 files changed, 337 insertions, 0 deletions
diff --git a/javax/activation/MimeTypeParameterList.java b/javax/activation/MimeTypeParameterList.java
new file mode 100644
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+++ b/javax/activation/MimeTypeParameterList.java
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+/* MimeTypeParameterList.java -- Handle a list of MIME type parameters.
+   Copyright (C) 2004 Free Software Foundation, Inc.
+
+This file is part of GNU Classpath.
+
+GNU Classpath is free software; you can redistribute it and/or modify
+it under the terms of the GNU General Public License as published by
+the Free Software Foundation; either version 2, or (at your option)
+any later version.
+
+GNU Classpath is distributed in the hope that it will be useful, but
+WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+General Public License for more details.
+
+You should have received a copy of the GNU General Public License
+along with GNU Classpath; see the file COPYING.  If not, write to the
+Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
+02110-1301 USA.
+
+Linking this library statically or dynamically with other modules is
+making a combined work based on this library.  Thus, the terms and
+conditions of the GNU General Public License cover the whole
+combination.
+
+As a special exception, the copyright holders of this library give you
+permission to link this library with independent modules to produce an
+executable, regardless of the license terms of these independent
+modules, and to copy and distribute the resulting executable under
+terms of your choice, provided that you also meet, for each linked
+independent module, the terms and conditions of the license of that
+module.  An independent module is a module which is not derived from
+or based on this library.  If you modify this library, you may extend
+this exception to your version of the library, but you are not
+obligated to do so.  If you do not wish to do so, delete this
+exception statement from your version. */
+
+package javax.activation;
+
+import java.util.ArrayList;
+import java.util.Enumeration;
+import java.util.HashMap;
+import java.util.Iterator;
+import java.util.List;
+import java.util.Map;
+
+/**
+ * A list of MIME type parameters, as specified in RFCs 2045 and 2046.
+ *
+ * @author <a href='mailto:dog@gnu.org'>Chris Burdess</a>
+ * @version 1.1
+ */
+public class MimeTypeParameterList
+{
+
+  private static final String TSPECIALS = "()<>@,;:/[]?=\\\"";
+  
+  private List parameterNames;
+  private Map parameterValues;
+  
+  /**
+   * Constructor for an empty parameter list.
+   */
+  public MimeTypeParameterList()
+  {
+    parameterNames = new ArrayList();
+    parameterValues = new HashMap();
+  }
+
+  /**
+   * Constructor that parses the specified MIME parameter data.
+   * @param parameterList a MIME parameter list string representation
+   */
+  public MimeTypeParameterList(String parameterList)
+    throws MimeTypeParseException
+  {
+    parameterNames = new ArrayList();
+    parameterValues = new HashMap();
+    parse(parameterList);
+  }
+
+  /**
+   * Parses the specified MIME parameter data, storing the results in this
+   * object.
+   * @param parameterList a MIME parameter list string representation
+   */
+  protected void parse(String parameterList)
+    throws MimeTypeParseException
+  {
+    if (parameterList == null)
+      {
+        return;
+      }
+    // Tokenize list into parameters
+    char[] chars = parameterList.toCharArray();
+    int len = chars.length;
+    boolean inQuotedString = false;
+    StringBuffer buffer = new StringBuffer();
+    List params = new ArrayList();
+    for (int i = 0; i < len; i++)
+      {
+        char c = chars[i];
+        if (c == ';' && !inQuotedString)
+          {
+            String param = buffer.toString().trim();
+            if (param.length() > 0)
+              {
+                params.add(param);
+              }
+            buffer.setLength(0);
+          }
+        else
+          {
+            if (c == '"')
+              {
+                inQuotedString = !inQuotedString;
+              }
+            buffer.append(c);
+          }
+      }
+    String param = buffer.toString().trim();
+    if (param.length() > 0)
+      {
+        params.add(param);
+      }
+    
+    // Tokenize each parameter into name + value
+    for (Iterator i = params.iterator(); i.hasNext(); )
+      {
+        param = (String)i.next();
+        int ei = param.indexOf('=');
+        if (ei == -1)
+          {
+            throw new MimeTypeParseException("Couldn't find the '=' that " +
+                                             "separates a parameter name " +
+                                             "from its value.");
+          }
+        String name = param.substring(0, ei).trim();
+        MimeType.checkValidity(name, "Parameter name is invalid");
+        String value = param.substring(ei + 1).trim();
+        len = value.length();
+        if (len > 1 && value.charAt(0) == '"' &&
+            value.charAt(len - 1) == '"')
+          {
+            value = unquote(value);
+          }
+        else
+          {
+            MimeType.checkValidity(name, "Parameter value is invalid");
+          }
+        
+        parameterNames.add(name);
+        parameterValues.put(name.toLowerCase(), value);
+      }
+  }
+  
+  /**
+   * Returns the number of parameters.
+   */
+  public synchronized int size()
+  {
+    return parameterNames.size();
+  }
+  
+  /**
+   * Indicates if there are no parameters.
+   */
+  public synchronized boolean isEmpty()
+  {
+    return parameterNames.isEmpty();
+  }
+
+  /**
+   * Returns the value for the specified parameter name.
+   * @param name the parameter name
+   */
+  public synchronized String get(String name)
+  {
+    name = name.trim();
+    return (String) parameterValues.get(name.toLowerCase());
+  }
+  
+  /**
+   * Sets the value for the specified parameter name.
+   * @param name the parameter name
+   * @param value the parameter value
+   */
+  public synchronized void set(String name, String value)
+  {
+    name = name.trim();
+    boolean exists = false;
+    for (Iterator i = parameterNames.iterator(); i.hasNext(); )
+      {
+        String pname = (String)i.next();
+        if (name.equalsIgnoreCase(pname))
+          {
+            exists = true;
+          }
+      }
+    if (!exists)
+      {
+        parameterNames.add(name);
+      }
+    parameterValues.put(name.toLowerCase(), value);
+  }
+  
+  /**
+   * Removes the parameter identified by the specified name.
+   * @param name the parameter name
+   */
+  public synchronized void remove(String name)
+  {
+    name = name.trim();
+    for (Iterator i = parameterNames.iterator(); i.hasNext(); )
+      {
+        String pname = (String)i.next();
+        if (name.equalsIgnoreCase(pname))
+          {
+            i.remove();
+          }
+      }
+    parameterValues.remove(name.toLowerCase());
+  }
+  
+  /**
+   * Returns an enumeration of all the parameter names.
+   */
+  public synchronized Enumeration getNames()
+  {
+    return new IteratorEnumeration(parameterNames.iterator());
+  }
+  
+  /**
+   * Returns an RFC 2045-compliant string representation of this parameter
+   * list.
+   */
+  public synchronized String toString()
+  {
+    StringBuffer buffer = new StringBuffer();
+    for (Iterator i = parameterNames.iterator(); i.hasNext(); )
+      {
+        String name = (String)i.next();
+        String value = (String)parameterValues.get(name.toLowerCase());
+        
+        buffer.append(';');
+        buffer.append(' ');
+        buffer.append(name);
+        buffer.append('=');
+        buffer.append(quote(value));
+      }
+    return buffer.toString();
+  }
+  
+  private static String quote(String value)
+  {
+    boolean needsQuoting = false;
+    int len = value.length();
+    for (int i = 0; i < len; i++)
+      {
+        if (!MimeType.isValidChar(value.charAt(i)))
+          {
+            needsQuoting = true;
+            break;
+          }
+      }
+    
+    if (needsQuoting)
+      {
+        StringBuffer buffer = new StringBuffer();
+        buffer.append('"');
+        for (int i = 0; i < len; i++)
+          {
+            char c = value.charAt(i);
+            if (c == '\\' || c == '"')
+              {
+                buffer.append('\\');
+              }
+            buffer.append(c);
+          }
+        buffer.append('"');
+        return buffer.toString();
+      }
+    return value;
+  }
+  
+  private static String unquote(String value)
+  {
+    int len = value.length();
+    StringBuffer buffer = new StringBuffer();
+    for (int i = 1; i < len - 1; i++)
+      {
+        char c = value.charAt(i);
+        if (c == '\\')
+          {
+            i++;
+            if (i < len - 1)
+              {
+                c = value.charAt(i);
+                if (c != '\\' && c != '"')
+                  {
+                    buffer.append('\\');
+                  }
+              }
+          }
+        buffer.append(c);
+      }
+    return buffer.toString();
+  }
+  
+  /**
+   * Enumeration proxy for an Iterator.
+   */
+  static class IteratorEnumeration
+    implements Enumeration
+  {
+    
+    final Iterator iterator;
+    
+    IteratorEnumeration(Iterator iterator)
+    {
+      this.iterator = iterator;
+    }
+    
+    public boolean hasMoreElements()
+    {
+      return iterator.hasNext();
+    }
+    
+    public Object nextElement()
+    {
+      return iterator.next();
+    }
+    
+  }
+  
+}
+