1 files changed, 161 insertions, 0 deletions
diff --git a/bcprov/src/main/java/org/bouncycastle/x509/X509StreamParser.java b/bcprov/src/main/java/org/bouncycastle/x509/X509StreamParser.java
new file mode 100644
index 0000000..3ad2846
--- /dev/null
+++ b/bcprov/src/main/java/org/bouncycastle/x509/X509StreamParser.java
@@ -0,0 +1,161 @@
+package org.bouncycastle.x509;
+
+import org.bouncycastle.x509.util.StreamParser;
+import org.bouncycastle.x509.util.StreamParsingException;
+
+import java.io.ByteArrayInputStream;
+import java.io.InputStream;
+import java.security.NoSuchAlgorithmException;
+import java.security.NoSuchProviderException;
+import java.security.Provider;
+import java.util.Collection;
+
+/**
+ *
+ * This class allows access to different implementations for reading X.509
+ * objects from streams.
+ * <p>
+ * A X509StreamParser is used to read a collection of objects or a single object
+ * of a certain X.509 object structure. E.g. one X509StreamParser can read
+ * certificates, another one CRLs, certification paths, attribute certificates
+ * and so on. The kind of object structure is specified with the
+ * <code>algorithm</code> parameter to the <code>getInstance</code> methods.
+ * <p>
+ * Implementations must implement the
+ * {@link org.bouncycastle.x509.X509StreamParserSpi}.
+ */
+public class X509StreamParser
+    implements StreamParser
+{
+    /**
+     * Generates a StreamParser object that implements the specified type. If
+     * the default provider package provides an implementation of the requested
+     * type, an instance of StreamParser containing that implementation is
+     * returned. If the type is not available in the default package, other
+     * packages are searched.
+     *
+     * @param type
+     *            The name of the requested X.509 object type.
+     * @return a StreamParser object for the specified type.
+     *
+     * @exception NoSuchParserException
+     *                if the requested type is not available in the default
+     *                provider package or any of the other provider packages
+     *                that were searched.
+     */
+    public static X509StreamParser getInstance(String type)
+        throws NoSuchParserException
+    {
+        try
+        {
+            X509Util.Implementation impl = X509Util.getImplementation("X509StreamParser", type);
+
+            return createParser(impl);
+        }
+        catch (NoSuchAlgorithmException e)
+        {
+            throw new NoSuchParserException(e.getMessage());
+        }
+    }
+
+    /**
+     * Generates a X509StreamParser object for the specified type from the
+     * specified provider.
+     *
+     * @param type
+     *            the name of the requested X.509 object type.
+     * @param provider
+     *            the name of the provider.
+     *
+     * @return a X509StreamParser object for the specified type.
+     *
+     * @exception NoSuchParserException
+     *                if the type is not available from the specified provider.
+     *
+     * @exception NoSuchProviderException
+     *                if the provider can not be found.
+     *
+     * @see Provider
+     */
+    public static X509StreamParser getInstance(String type, String provider)
+        throws NoSuchParserException, NoSuchProviderException
+    {
+        return getInstance(type, X509Util.getProvider(provider));
+    }
+
+    /**
+     * Generates a X509StreamParser object for the specified type from the
+     * specified provider.
+     *
+     * @param type
+     *            the name of the requested X.509 object type.
+     * @param provider
+     *            the Provider to use.
+     *
+     * @return a X509StreamParser object for the specified type.
+     *
+     * @exception NoSuchParserException
+     *                if the type is not available from the specified provider.
+     *
+     * @see Provider
+     */
+    public static X509StreamParser getInstance(String type, Provider provider)
+        throws NoSuchParserException
+    {
+        try
+        {
+            X509Util.Implementation impl = X509Util.getImplementation("X509StreamParser", type, provider);
+
+            return createParser(impl);
+        }
+        catch (NoSuchAlgorithmException e)
+        {
+            throw new NoSuchParserException(e.getMessage());
+        }
+    }
+
+    private static X509StreamParser createParser(X509Util.Implementation impl)
+    {
+        X509StreamParserSpi spi = (X509StreamParserSpi)impl.getEngine();
+
+        return new X509StreamParser(impl.getProvider(), spi);
+    }
+
+    private Provider            _provider;
+    private X509StreamParserSpi _spi;
+
+    private X509StreamParser(
+        Provider provider,
+        X509StreamParserSpi spi)
+    {
+        _provider = provider;
+        _spi = spi;
+    }
+
+    public Provider getProvider()
+    {
+        return _provider;
+    }
+
+    public void init(InputStream stream)
+    {
+        _spi.engineInit(stream);
+    }
+
+    public void init(byte[] data)
+    {
+        _spi.engineInit(new ByteArrayInputStream(data));
+    }
+
+    public Object read()
+        throws StreamParsingException
+    {
+        return _spi.engineRead();
+    }
+
+    public Collection readAll()
+        throws StreamParsingException
+    {
+        return _spi.engineReadAll();
+    }
+}