001// Copyright 2006, 2007, 2008, 2009 The Apache Software Foundation
002//
003// Licensed under the Apache License, Version 2.0 (the "License");
004// you may not use this file except in compliance with the License.
005// You may obtain a copy of the License at
006//
007//     http://www.apache.org/licenses/LICENSE-2.0
008//
009// Unless required by applicable law or agreed to in writing, software
010// distributed under the License is distributed on an "AS IS" BASIS,
011// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
012// See the License for the specific language governing permissions and
013// limitations under the License.
014
015package org.apache.tapestry5.corelib.pages;
016
017import org.apache.tapestry5.SymbolConstants;
018import org.apache.tapestry5.annotations.ContentType;
019import org.apache.tapestry5.annotations.Property;
020import org.apache.tapestry5.ioc.annotations.Inject;
021import org.apache.tapestry5.ioc.annotations.Symbol;
022import org.apache.tapestry5.ioc.internal.util.InternalUtils;
023import org.apache.tapestry5.services.ExceptionReporter;
024import org.apache.tapestry5.services.Request;
025import org.apache.tapestry5.services.Session;
026
027import java.util.List;
028import java.util.regex.Pattern;
029
030/**
031 * Responsible for reporting runtime exceptions. This page is quite verbose and is usually overridden in a production
032 * application. When {@link org.apache.tapestry5.SymbolConstants#PRODUCTION_MODE} is "true", it is very abbreviated.
033 *
034 * @see org.apache.tapestry5.corelib.components.ExceptionDisplay
035 */
036@ContentType("text/html")
037public class ExceptionReport implements ExceptionReporter
038{
039    private static final String PATH_SEPARATOR_PROPERTY = "path.separator";
040
041    // Match anything ending in .(something?)path.
042
043    private static final Pattern PATH_RECOGNIZER = Pattern.compile("\\..*path$");
044
045    @Property
046    private String attributeName;
047
048    @Inject
049    @Property
050    private Request request;
051
052    @Inject
053    @Symbol(SymbolConstants.PRODUCTION_MODE)
054    @Property(write = false)
055    private boolean productionMode;
056
057    @Inject
058    @Symbol(SymbolConstants.TAPESTRY_VERSION)
059    @Property(write = false)
060    private String tapestryVersion;
061
062    @Inject
063    @Symbol(SymbolConstants.APPLICATION_VERSION)
064    @Property(write = false)
065    private String applicationVersion;
066
067    @Property(write = false)
068    private Throwable rootException;
069
070    @Property
071    private String propertyName;
072
073    private final String pathSeparator = System.getProperty(PATH_SEPARATOR_PROPERTY);
074
075    public void reportException(Throwable exception)
076    {
077        rootException = exception;
078    }
079
080    public boolean getHasSession()
081    {
082        return request.getSession(false) != null;
083    }
084
085    public Session getSession()
086    {
087        return request.getSession(false);
088    }
089
090    public Object getAttributeValue()
091    {
092        return getSession().getAttribute(attributeName);
093    }
094
095    /**
096     * Returns a <em>sorted</em> list of system property names.
097     */
098    public List<String> getSystemProperties()
099    {
100        return InternalUtils.sortedKeys(System.getProperties());
101    }
102
103    public String getPropertyValue()
104    {
105        return System.getProperty(propertyName);
106    }
107
108    public boolean isComplexProperty()
109    {
110        return PATH_RECOGNIZER.matcher(propertyName).find() && getPropertyValue().contains(pathSeparator);
111    }
112
113    public String[] getComplexPropertyValue()
114    {
115        // Neither : nor ; is a regexp character.
116
117        return getPropertyValue().split(pathSeparator);
118    }
119}