feat(jdk8): add source files of JDK 8.

src/main/resources/jdk8/com/sun/beans/decoder/JavaElementHandler.java

@@ -0,0 +1,151 @@
+/*
+ * Copyright (c) 2008, 2013, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.  Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code 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
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+package com.sun.beans.decoder;
+
+import java.beans.XMLDecoder;
+
+/**
+ * This class is intended to handle <java> element.
+ * Each element that appears in the body of this element
+ * is evaluated in the context of the decoder itself.
+ * Typically this outer context is used to retrieve the owner of the decoder,
+ * which can be set before reading the archive.
+ * <p>The following attributes are supported:
+ * <dl>
+ * <dt>version
+ * <dd>the Java version (not supported)
+ * <dt>class
+ * <dd>the type of preferable parser (not supported)
+ * <dt>id
+ * <dd>the identifier of the variable that is intended to store the result
+ * </dl>
+ *
+ * @see DocumentHandler#getOwner
+ * @see DocumentHandler#setOwner
+ * @since 1.7
+ *
+ * @author Sergey A. Malenkov
+ */
+final class JavaElementHandler extends ElementHandler {
+    private Class<?> type;
+    private ValueObject value;
+
+    /**
+     * Parses attributes of the element.
+     * The following attributes are supported:
+     * <dl>
+     * <dt>version
+     * <dd>the Java version (not supported)
+     * <dt>class
+     * <dd>the type of preferable parser (not supported)
+     * <dt>id
+     * <dd>the identifier of the variable that is intended to store the result
+     * </dl>
+     *
+     * @param name   the attribute name
+     * @param value  the attribute value
+     */
+    @Override
+    public void addAttribute(String name, String value) {
+        if (name.equals("version")) { // NON-NLS: the attribute name
+            // unsupported attribute
+        } else if (name.equals("class")) { // NON-NLS: the attribute name
+            // check class for owner
+            this.type = getOwner().findClass(value);
+        } else {
+            super.addAttribute(name, value);
+        }
+    }
+
+    /**
+     * Adds the argument to the list of readed objects.
+     *
+     * @param argument  the value of the element that contained in this one
+     */
+    @Override
+    protected void addArgument(Object argument) {
+        getOwner().addObject(argument);
+    }
+
+    /**
+     * Tests whether the value of this element can be used
+     * as an argument of the element that contained in this one.
+     *
+     * @return {@code true} if the value of this element should be used
+     *         as an argument of the element that contained in this one,
+     *         {@code false} otherwise
+     */
+    @Override
+    protected boolean isArgument() {
+        return false; // do not use owner as object
+    }
+
+    /**
+     * Returns the value of this element.
+     *
+     * @return the value of this element
+     */
+    @Override
+    protected ValueObject getValueObject() {
+        if (this.value == null) {
+            this.value = ValueObjectImpl.create(getValue());
+        }
+        return this.value;
+    }
+
+    /**
+     * Returns the owner of the owner document handler
+     * as a value of &lt;java&gt; element.
+     *
+     * @return the owner of the owner document handler
+     */
+    private Object getValue() {
+        Object owner = getOwner().getOwner();
+        if ((this.type == null) || isValid(owner)) {
+            return owner;
+        }
+        if (owner instanceof XMLDecoder) {
+            XMLDecoder decoder = (XMLDecoder) owner;
+            owner = decoder.getOwner();
+            if (isValid(owner)) {
+                return owner;
+            }
+        }
+        throw new IllegalStateException("Unexpected owner class: " + owner.getClass().getName());
+    }
+
+    /**
+     * Validates the owner of the &lt;java&gt; element.
+     * The owner is valid if it is {@code null} or an instance
+     * of the class specified by the {@code class} attribute.
+     *
+     * @param owner  the owner of the &lt;java&gt; element
+     * @return {@code true} if the {@code owner} is valid;
+     *         {@code false} otherwise
+     */
+    private boolean isValid(Object owner) {
+        return (owner == null) || this.type.isInstance(owner);
+    }
+}