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Glassfish example source code file (ValueConstraint.java)
The Glassfish ValueConstraint.java source code/* * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS HEADER. * * Copyright (c) 1997-2010 Oracle and/or its affiliates. All rights reserved. * * The contents of this file are subject to the terms of either the GNU * General Public License Version 2 only ("GPL") or the Common Development * and Distribution License("CDDL") (collectively, the "License"). You * may not use this file except in compliance with the License. You can * obtain a copy of the License at * https://glassfish.dev.java.net/public/CDDL+GPL_1_1.html * or packager/legal/LICENSE.txt. See the License for the specific * language governing permissions and limitations under the License. * * When distributing the software, include this License Header Notice in each * file and include the License file at packager/legal/LICENSE.txt. * * GPL Classpath Exception: * Oracle designates this particular file as subject to the "Classpath" * exception as provided by Oracle in the GPL Version 2 section of the License * file that accompanied this code. * * Modifications: * If applicable, add the following below the License Header, with the fields * enclosed by brackets [] replaced by your own identifying information: * "Portions Copyright [year] [name of copyright owner]" * * Contributor(s): * If you wish your version of this file to be governed by only the CDDL or * only the GPL Version 2, indicate your decision by adding "[Contributor] * elects to include this software in this distribution under the [CDDL or GPL * Version 2] license." If you don't indicate a single choice of license, a * recipient has the option to distribute your version of this file under * either the CDDL, the GPL Version 2 or to extend the choice of license to * its licensees as provided above. However, if you add GPL Version 2 code * and therefore, elected the GPL Version 2 license, then the option applies * only if the new code is made subject to such option by the copyright * holder. */ package com.sun.appserv.web.cache.mapping; import com.sun.logging.LogDomains; import java.text.MessageFormat; import java.util.ResourceBundle; import java.util.logging.Logger; /** ValueConstraint class represents a field's value constraint; * supports common matching expressions. */ public class ValueConstraint { private static final String[] EXPR_NAMES = { "", "'equals'", "'greater'", "'lesser'", "'not-equals'", "'in-range'" }; private static final Logger _logger = LogDomains.getLogger( ValueConstraint.class, LogDomains.WEB_LOGGER); /** * The resource bundle containing the localized message strings. */ private static final ResourceBundle _rb = _logger.getResourceBundle(); // field values to match private String matchValue = null; private float minValue = Float.MIN_VALUE; private float maxValue = Float.MAX_VALUE; // the default match expr private int matchExpr = Constants.MATCH_EQUALS; // string representation of this expr and the object private String str; // whether to cache if there was a match private boolean cacheOnMatch = true; // whether to cache if there was a failure to match private boolean cacheOnMatchFailure = false; /** create constraint: field value matches with the given string expression * @param value specific value to match * @param expr match expression */ public ValueConstraint(String value, String expr) throws IllegalArgumentException { int match; if (expr == null || expr.equals("equals")) { match = Constants.MATCH_EQUALS; } else if (expr.equals("greater")) { match = Constants.MATCH_GREATER; try { minValue = Float.parseFloat(value); } catch (NumberFormatException nfe) { String msg = _rb.getString("cache.mapping.greaterExpRequiresNumeric"); Object[] params = { value }; msg = MessageFormat.format(msg, params); throw new IllegalArgumentException(msg); } } else if (expr.equals("lesser")) { match = Constants.MATCH_LESSER; try { maxValue = Float.parseFloat(value); } catch (NumberFormatException nfe) { String msg = _rb.getString("cache.mapping.lesserExpRequiresNumeric"); Object[] params = { value }; msg = MessageFormat.format(msg, params); throw new IllegalArgumentException(msg); } } else if (expr.equals("not-equals")) match = Constants.MATCH_NOT_EQUALS; else if (expr.equals("in-range")) { match = Constants.MATCH_IN_RANGE; parseRangeValue(value); } else { String msg = _rb.getString("cache.mapping.illegalValueExpr"); Object[] params = { value, expr }; msg = MessageFormat.format(msg, params); throw new IllegalArgumentException(msg); } this.matchExpr = match; this.matchValue = value; } /** * match the given a range of values * @param value range 2034 - 4156 * @throws IllegalArgumentException * check for numeric values * check if the first value is lesser than the next * at a minimum, there should be separator and one digit min and * max values("m-n"). * * XXX: check how this handles negative ranges: -1230 - -124. */ private void parseRangeValue(String value) throws IllegalArgumentException { float val1, val2; if (value == null || value.length() <= 2) { String msg = _rb.getString("cache.mapping.illegalValueRange"); Object[] params = { value }; msg = MessageFormat.format(msg, params); throw new IllegalArgumentException(msg); } // get the separator first int separator; if (value.charAt(0) == '-') { separator = value.indexOf('-', 1); } else { separator = value.indexOf('-', 0); } if (separator == -1) { String msg = _rb.getString("cache.mapping.missingRangeSep"); Object[] params = { value }; msg = MessageFormat.format(msg, params); throw new IllegalArgumentException(msg); } // get the first value String sval1 = value.substring(0, separator).trim(); try { val1 = Float.parseFloat(sval1); } catch (NumberFormatException nfe) { String msg = _rb.getString("cache.mapping.lowerRangeRequiresNumber"); Object[] params = { sval1 }; msg = MessageFormat.format(msg, params); throw new IllegalArgumentException(msg); } // is max value specified at all? if (separator == value.length()){ String msg = _rb.getString("cache.mapping.rangeRequiresUpperBound"); Object[] params = { value }; msg = MessageFormat.format(msg, params); throw new IllegalArgumentException(msg); } String sval2 = value.substring(separator + 1).trim(); try { val2 = Float.parseFloat(sval2); } catch (NumberFormatException nfe) { String msg = _rb.getString("cache.mapping.upperRangeRequiresNumber"); Object[] params = { sval2 }; msg = MessageFormat.format(msg, params); throw new IllegalArgumentException(msg); } this.minValue = val1; this.maxValue = val2; } /** set value for this constraint * @param value specific value to match */ public void setValue(String value) { this.matchValue = value; } /** set minimum value * @param value minimum value */ public void setMinValue(float value) { this.minValue = value; } /** set the maximum value * @param value maximum value */ public void setMaxValue(float value) { this.maxValue = value; } /** set field matching expression * @param expr match expression */ public void setMatchExpr(int expr) { this.matchExpr = expr; } /** set whether to cache if there was a match * @param cacheOnMatch should the field value match, enable cache? */ public void setCacheOnMatch(boolean cacheOnMatch) { this.cacheOnMatch = cacheOnMatch; } /** set whether to cache if there was a failure to match * @param cacheOnMatchFailure should the field value doesn't match, * enable cache? */ public void setCacheOnMatchFailure(boolean cacheOnMatchFailure) { this.cacheOnMatchFailure = cacheOnMatchFailure; } /** match with the given <code>Object value. * @return <code>true if the value passes the constraint, * <code>false otherwise. */ public boolean matches(Object value) { boolean result = false; switch (matchExpr) { case Constants.MATCH_EQUALS: result = matchValue.equals(value); break; case Constants.MATCH_NOT_EQUALS: result = !(matchValue.equals(value)); break; case Constants.MATCH_GREATER: // convert to a Float type { Float lval = new Float(value.toString()); result = (lval.floatValue() > minValue); } break; case Constants.MATCH_LESSER: // convert to a Float type { Float lval = new Float(value.toString()); result = (lval.floatValue() < maxValue); } break; case Constants.MATCH_IN_RANGE: // convert to a Float type { Float lval = new Float(value.toString()); result = (lval.floatValue() >= minValue && lval.floatValue() <= maxValue); } break; } // did it match? return (result == true) ? cacheOnMatch : cacheOnMatchFailure; } /** * @return a string representation of this value/expr element */ public String toString() { if (str == null) { str = "match value = " + matchValue + " match expr = " + EXPR_NAMES[matchExpr]; } return str; } } Other Glassfish examples (source code examples)Here is a short list of links related to this Glassfish ValueConstraint.java source code file: |
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