| /* |
| * The Apache Software License, Version 1.1 |
| * |
| * |
| * Copyright (c) 2003 The Apache Software Foundation. All rights |
| * reserved. |
| * |
| * Redistribution and use in source and binary forms, with or without |
| * modification, are permitted provided that the following conditions |
| * are met: |
| * |
| * 1. Redistributions of source code must retain the above copyright |
| * notice, this list of conditions and the following disclaimer. |
| * |
| * 2. Redistributions in binary form must reproduce the above copyright |
| * notice, this list of conditions and the following disclaimer in |
| * the documentation and/or other materials provided with the |
| * distribution. |
| * |
| * 3. The end-user documentation included with the redistribution, |
| * if any, must include the following acknowledgment: |
| * "This product includes software developed by the |
| * Apache Software Foundation (http://www.apache.org/)." |
| * Alternately, this acknowledgment may appear in the software itself, |
| * if and wherever such third-party acknowledgments normally appear. |
| * |
| * 4. The names "Apache" and "Apache Software Foundation" must |
| * not be used to endorse or promote products derived from this |
| * software without prior written permission. For written |
| * permission, please contact apache@apache.org. |
| * |
| * 5. Products derived from this software may not be called "Apache |
| * XMLBeans", nor may "Apache" appear in their name, without prior |
| * written permission of the Apache Software Foundation. |
| * |
| * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED |
| * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES |
| * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE |
| * DISCLAIMED. IN NO EVENT SHALL THE APACHE SOFTWARE FOUNDATION OR |
| * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, |
| * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT |
| * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF |
| * USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND |
| * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, |
| * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT |
| * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF |
| * SUCH DAMAGE. |
| * ==================================================================== |
| * |
| * This software consists of voluntary contributions made by many |
| * individuals on behalf of the Apache Software Foundation and was |
| * originally based on software copyright (c) 2000-2003 BEA Systems |
| * Inc., <http://www.bea.com/>. For more information on the Apache Software |
| * Foundation, please see <http://www.apache.org/>. |
| */ |
| |
| package org.apache.xmlbeans.impl.store; |
| |
| import java.lang.reflect.Method; |
| |
| public final class XqrlDelegate |
| { |
| private XqrlDelegate ( ) |
| { |
| } |
| |
| static void check ( Object o ) |
| { |
| if (o == null) |
| { |
| throw |
| new UnsupportedOperationException( |
| "This operation requires xqrl.jar" ); |
| } |
| } |
| |
| static Path.Query compilePath ( String path, String currentNodeVar ) |
| { |
| return |
| (Path.Query) |
| invoke( _compilePath, new Object[] { path, currentNodeVar } ); |
| } |
| |
| static Path.Query compileQuery ( String queryExpr, String currentNodeVar ) |
| { |
| return |
| (Path.Query) |
| invoke( |
| _compileQuery, new Object[] { queryExpr, currentNodeVar, new Boolean(true) } ); |
| } |
| |
| private static void throwRuntimeException ( Throwable e ) |
| { |
| if (e instanceof RuntimeException) |
| throw (RuntimeException) e; |
| |
| Throwable cause = e.getCause(); |
| |
| RuntimeException rte = new RuntimeException( cause.getMessage() ); |
| |
| rte.initCause( cause ); |
| |
| throw rte; |
| } |
| |
| private static Object invoke ( Method method, Object[] params ) |
| { |
| if (method == null) |
| { |
| throw |
| new UnsupportedOperationException( |
| "This operation requires xqrl.jar" ); |
| } |
| |
| try |
| { |
| return method.invoke( null, params ); |
| } |
| catch ( Throwable e ) |
| { |
| throwRuntimeException( e ); |
| |
| return null; // Unreachable |
| } |
| } |
| |
| // Loose coupling functionality with xqrl.jar |
| |
| private static Method _compilePath; |
| private static Method _compileQuery; |
| |
| static |
| { |
| boolean hasXqrl; |
| |
| try |
| { |
| Class.forName( "org.apache.xmlbeans.impl.store.XqrlImpl" ); |
| |
| hasXqrl = true; |
| } |
| catch ( ClassNotFoundException e ) |
| { |
| hasXqrl = false; |
| } |
| |
| if (hasXqrl) |
| { |
| try |
| { |
| Class xqrlImpl = |
| Class.forName( "org.apache.xmlbeans.impl.store.XqrlImpl" ); |
| |
| _compilePath = |
| xqrlImpl.getDeclaredMethod( |
| "compilePath", |
| new Class[] { String.class, String.class } ); |
| |
| _compileQuery = |
| xqrlImpl.getDeclaredMethod( |
| "compileQuery", |
| new Class[] { String.class, String.class, Boolean.class } ); |
| |
| } |
| catch ( Exception e ) |
| { |
| throw new RuntimeException( e ); |
| } |
| } |
| } |
| } |