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authorupstream source tree <ports@midipix.org>2015-03-15 20:14:05 -0400
committerupstream source tree <ports@midipix.org>2015-03-15 20:14:05 -0400
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tree976dc5ab7fddf506dadce60ae936f43f58787092 /libjava/classpath/java/lang/reflect/ParameterizedType.java
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+/* ParameterizedType.java -- Represents parameterized types e.g. List<String>
+ Copyright (C) 2004, 2005 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 java.lang.reflect;
+
+/**
+ * <p>
+ * Represents a type which is parameterized over one or more other
+ * types. For example, <code>List&lt;Integer&gt;</code> is a parameterized
+ * type, with <code>List</code> parameterized over the type
+ * <code>Integer</code>.
+ * </p>
+ * <p>
+ * Instances of this classes are created as needed, during reflection.
+ * On creating a parameterized type, <code>p</code>, the
+ * <code>GenericTypeDeclaration</code> corresponding to <code>p</code>
+ * is created and resolved. Each type argument of <code>p</code>
+ * is then created recursively; details of this process are availble
+ * in the documentation of <code>TypeVariable</code>. This creation
+ * process only happens once; repetition has no effect.
+ * </p>
+ * <p>
+ * Implementors of this interface must implement an appropriate
+ * <code>equals()</code> method. This method should equate any
+ * two instances of the implementing class that have the same
+ * <code>GenericTypeDeclaration</code> and <code>Type</code>
+ * parameters.
+ *
+ * @author Tom Tromey (tromey@redhat.com)
+ * @author Andrew John Hughes (gnu_andrew@member.fsf.org)
+ * @see GenericDeclaration
+ * @see TypeVariable
+ * @since 1.5
+ */
+public interface ParameterizedType
+ extends Type
+{
+
+ /**
+ * <p>
+ * Returns an array of <code>Type</code> objects, which gives
+ * the parameters of this type.
+ * </p>
+ * <p>
+ * <strong>Note</code>: the returned array may be empty. This
+ * occurs if the supposed <code>ParameterizedType</code> is simply
+ * a normal type wrapped inside a parameterized type.
+ * </p>
+ *
+ * @return an array of <code>Type</code>s, representing the arguments
+ * of this type.
+ * @throws TypeNotPresentException if any of the types referred to by
+ * the parameters of this type do not actually exist.
+ * @throws MalformedParameterizedTypeException if any of the types
+ * refer to a type which can not be instantiated.
+ */
+ Type[] getActualTypeArguments();
+
+ /**
+ * Returns the type of which this type is a member. For example,
+ * in <code>Top&lt;String&gt;.Bottom&lt;Integer&gt;</code>,
+ * <code>Bottom&lt;Integer&gt;</code> is a member of
+ * <code>Top&lt;String&gt;</code>, and so the latter is returned
+ * by this method. Calling this method on top-level types (such as
+ * <code>Top&lt;String&gt;</code>) returns null.
+ *
+ * @return the type which owns this type.
+ * @throws TypeNotPresentException if the owner type referred to by
+ * this type do not actually exist.
+ * @throws MalformedParameterizedTypeException if the owner type
+ * referred to by this type can not be instantiated.
+ */
+ Type getOwnerType();
+
+ /**
+ * Returns a version of this type without parameters, which corresponds
+ * to the class or interface which declared the type. For example,
+ * the raw type corresponding to <code>List&lt;Double&gt;</code>
+ * is <code>List</code>, which was declared by the <code>List</code>
+ * class.
+ *
+ * @return the raw variant of this type (i.e. the type without
+ * parameters).
+ */
+ Type getRawType();
+
+}