Source Code Cross Referenced for DeploymentScope.java in  » Aspect-oriented » aspectwerkz-2.0 » org » codehaus » aspectwerkz » definition » Java Source Code / Java DocumentationJava Source Code and Java Documentation

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Java Source Code / Java Documentation » Aspect oriented » aspectwerkz 2.0 » org.codehaus.aspectwerkz.definition 
Source Cross Referenced  Class Diagram Java Document (Java Doc) 


001:        /**************************************************************************************
002:         * Copyright (c) Jonas BonŽr, Alexandre Vasseur. All rights reserved.                 *
003:         * http://aspectwerkz.codehaus.org                                                    *
004:         * ---------------------------------------------------------------------------------- *
005:         * The software in this package is published under the terms of the LGPL license      *
006:         * a copy of which has been included with this distribution in the license.txt file.  *
007:         **************************************************************************************/package org.codehaus.aspectwerkz.definition;
008:
009:        import org.codehaus.aspectwerkz.expression.ExpressionInfo;
010:        import org.codehaus.aspectwerkz.transform.TransformationConstants;
011:
012:        /**
013:         * Represents a deployment scope pointcut expression, that is used by the system to "prepare" the
014:         * join points that are picked out by this pointcut. Needed to allow hot-deployment of aspects
015:         * in a safe and predictable way.
016:         * <p/>
017:         * Can not and should not be created by the user only given to him from the framework.
018:         *
019:         * @author <a href="mailto:jboner@codehaus.org">Jonas BonŽr </a>
020:         */
021:        public final class DeploymentScope {
022:
023:            private final String m_name;
024:            private final String m_expression;
025:            /**
026:             * System prepared pointcut that matches all.
027:             */
028:            public static final DeploymentScope MATCH_ALL = new DeploymentScope(
029:                    TransformationConstants.ASPECTWERKZ_PREFIX
030:                            + "DeploymentScopes", "within(*..*)");
031:
032:            /**
033:             * Creates a new pointcut, should only be created by the system.
034:             *
035:             * @param name
036:             * @param expression
037:             */
038:            DeploymentScope(final String name, final String expression) {
039:                m_name = name;
040:                m_expression = expression;
041:            }
042:
043:            /**
044:             * Returns the name of the pointcut.
045:             *
046:             * @return
047:             */
048:            public String getName() {
049:                return m_name;
050:            }
051:
052:            /**
053:             * Returns the expression as a string.
054:             *
055:             * @return
056:             */
057:            public String getExpression() {
058:                return m_expression;
059:            }
060:
061:            /**
062:             * Merges the scope expression with a new expression. Uses '&&' to merge them.
063:             *
064:             * @param expression
065:             * @return
066:             */
067:            public ExpressionInfo newExpressionInfo(
068:                    final ExpressionInfo expression) {
069:                return new ExpressionInfo(new StringBuffer().append('(')
070:                        .append(expression.toString()).append(')').append(
071:                                " && ").append(m_expression).toString(),
072:                        expression.getNamespace());
073:            }
074:
075:            public boolean equals(Object o) {
076:                if (this  == o) {
077:                    return true;
078:                }
079:                if (!(o instanceof  DeploymentScope)) {
080:                    return false;
081:                }
082:
083:                final DeploymentScope deploymentScope = (DeploymentScope) o;
084:
085:                if (!m_expression.equals(deploymentScope.m_expression)) {
086:                    return false;
087:                }
088:                if (!m_name.equals(deploymentScope.m_name)) {
089:                    return false;
090:                }
091:
092:                return true;
093:            }
094:
095:            public int hashCode() {
096:                int result;
097:                result = m_name.hashCode();
098:                result = 29 * result + m_expression.hashCode();
099:                return result;
100:            }
101:        }
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