jdk8-mips64-public/jaxws: src/share/jaxws_classes/com/sun/tools/internal/xjc/SchemaCache.java@f50545b5e2f1

     1 /*

     2  * Copyright (c) 1997, 2011, Oracle and/or its affiliates. All rights reserved.

     3  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.

     4  *

     5  * This code is free software; you can redistribute it and/or modify it

     6  * under the terms of the GNU General Public License version 2 only, as

     7  * published by the Free Software Foundation.  Oracle designates this

     8  * particular file as subject to the "Classpath" exception as provided

     9  * by Oracle in the LICENSE file that accompanied this code.

    10  *

    11  * This code is distributed in the hope that it will be useful, but WITHOUT

    12  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or

    13  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License

    14  * version 2 for more details (a copy is included in the LICENSE file that

    15  * accompanied this code).

    16  *

    17  * You should have received a copy of the GNU General Public License version

    18  * 2 along with this work; if not, write to the Free Software Foundation,

    19  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.

    20  *

    21  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA

    22  * or visit www.oracle.com if you need additional information or have any

    23  * questions.

    24  */

    26 package com.sun.tools.internal.xjc;

    28 import java.net.URL;

    30 import javax.xml.validation.Schema;

    31 import javax.xml.validation.SchemaFactory;

    32 import javax.xml.validation.ValidatorHandler;

    34 import com.sun.xml.internal.bind.v2.WellKnownNamespace;

    36 import org.xml.sax.SAXException;

    38 /**

    39  * Wraps a JAXP {@link Schema} object and lazily instantiate it.

    40  *

    41  * This object is thread-safe. There should be only one instance of

    42  * this for the whole VM.

    43  *

    44  * @author Kohsuke Kawaguchi

    45  */

    46 public final class SchemaCache {

    48     private Schema schema;

    50     private final URL source;

    52     public SchemaCache(URL source) {

    53         this.source = source;

    54     }

    56     public ValidatorHandler newValidator() {

    57         synchronized(this) {

    58             if(schema==null) {

    59                 try {

    60                     schema = SchemaFactory.newInstance(WellKnownNamespace.XML_SCHEMA).newSchema(source);

    61                 } catch (SAXException e) {

    62                     // we make sure that the schema is correct before we ship.

    63                     throw new AssertionError(e);

    64                 }

    65             }

    66         }

    68         ValidatorHandler handler = schema.newValidatorHandler();

    69         return handler;

    70     }

    72 }

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