Importing Processing rev. 5503 (1.0.3).

core/src/processing/xml/ContentReader.java

@@ -0,0 +1,212 @@
+/* ContentReader.java                                              NanoXML/Java
+ *
+ * $Revision: 1.4 $
+ * $Date: 2002/01/04 21:03:28 $
+ * $Name: RELEASE_2_2_1 $
+ *
+ * This file is part of NanoXML 2 for Java.
+ * Copyright (C) 2000-2002 Marc De Scheemaecker, All Rights Reserved.
+ *
+ * This software is provided 'as-is', without any express or implied warranty.
+ * In no event will the authors be held liable for any damages arising from the
+ * use of this software.
+ *
+ * Permission is granted to anyone to use this software for any purpose,
+ * including commercial applications, and to alter it and redistribute it
+ * freely, subject to the following restrictions:
+ *
+ *  1. The origin of this software must not be misrepresented; you must not
+ *     claim that you wrote the original software. If you use this software in
+ *     a product, an acknowledgment in the product documentation would be
+ *     appreciated but is not required.
+ *
+ *  2. Altered source versions must be plainly marked as such, and must not be
+ *     misrepresented as being the original software.
+ *
+ *  3. This notice may not be removed or altered from any source distribution.
+ */
+
+package processing.xml;
+
+
+import java.io.Reader;
+import java.io.IOException;
+
+
+/**
+ * This reader reads data from another reader until a new element has
+ * been encountered.
+ *
+ * @author Marc De Scheemaecker
+ * @version $Name: RELEASE_2_2_1 $, $Revision: 1.4 $
+ */
+class ContentReader
+   extends Reader
+{
+
+   /**
+    * The encapsulated reader.
+    */
+   private StdXMLReader reader;
+
+
+   /**
+    * Buffer.
+    */
+   private String buffer;
+
+
+   /**
+    * Pointer into the buffer.
+    */
+   private int bufferIndex;
+
+
+   /**
+    * The entity resolver.
+    */
+   private XMLEntityResolver resolver;
+    
+
+   /**
+    * Creates the reader.
+    *
+    * @param reader the encapsulated reader
+    * @param resolver the entity resolver
+    * @param buffer data that has already been read from <code>reader</code>
+    */
+   ContentReader(StdXMLReader      reader,
+                 XMLEntityResolver resolver,
+                 String            buffer)
+   {
+      this.reader = reader;
+      this.resolver = resolver;
+      this.buffer = buffer;
+      this.bufferIndex = 0;
+   }
+
+
+   /**
+    * Cleans up the object when it's destroyed.
+    */
+   protected void finalize()
+      throws Throwable
+   {
+      this.reader = null;
+      this.resolver = null;
+      this.buffer = null;
+      super.finalize();
+   }
+
+
+   /**
+    * Reads a block of data.
+    *
+    * @param outputBuffer where to put the read data
+    * @param offset first position in buffer to put the data
+    * @param size maximum number of chars to read
+    *
+    * @return the number of chars read, or -1 if at EOF
+    *
+    * @throws java.io.IOException
+    *		if an error occurred reading the data
+    */
+   public int read(char[] outputBuffer,
+                   int    offset,
+                   int    size)
+      throws IOException
+   {
+      try {
+         int charsRead = 0;
+         int bufferLength = this.buffer.length();
+
+         if ((offset + size) > outputBuffer.length) {
+            size = outputBuffer.length - offset;
+         }
+
+         while (charsRead < size) {
+            String str = "";
+            char ch;
+
+            if (this.bufferIndex >= bufferLength) {
+               str = XMLUtil.read(this.reader, '&');
+               ch = str.charAt(0);
+            } else {
+               ch = this.buffer.charAt(this.bufferIndex);
+               this.bufferIndex++;
+               outputBuffer[charsRead] = ch;
+               charsRead++;
+               continue; // don't interprete chars in the buffer
+            }
+
+            if (ch == '<') {
+               this.reader.unread(ch);
+               break;
+            }
+
+            if ((ch == '&') && (str.length() > 1)) {
+               if (str.charAt(1) == '#') {
+                  ch = XMLUtil.processCharLiteral(str);
+               } else {
+                  XMLUtil.processEntity(str, this.reader, this.resolver);
+                  continue;
+               }
+            }
+
+            outputBuffer[charsRead] = ch;
+            charsRead++;
+         }
+
+         if (charsRead == 0) {
+            charsRead = -1;
+         }
+
+         return charsRead;
+      } catch (XMLParseException e) {
+         throw new IOException(e.getMessage());
+      }
+   }
+
+
+   /**
+    * Skips remaining data and closes the stream.
+    *
+    * @throws java.io.IOException
+    *		if an error occurred reading the data
+    */
+   public void close()
+      throws IOException
+   {
+      try {
+         int bufferLength = this.buffer.length();
+
+         for (;;) {
+            String str = "";
+            char ch;
+
+            if (this.bufferIndex >= bufferLength) {
+               str = XMLUtil.read(this.reader, '&');
+               ch = str.charAt(0);
+            } else {
+               ch = this.buffer.charAt(this.bufferIndex);
+               this.bufferIndex++;
+               continue; // don't interprete chars in the buffer
+            }
+
+            if (ch == '<') {
+               this.reader.unread(ch);
+               break;
+            }
+
+            if ((ch == '&') && (str.length() > 1)) {
+               if (str.charAt(1) != '#') {
+                  XMLUtil.processEntity(str, this.reader, this.resolver);
+               }
+            }
+         }
+      } catch (XMLParseException e) {
+         throw new IOException(e.getMessage());
+      }
+   }
+
+}