| /* |
| * Licensed to the Apache Software Foundation (ASF) under one |
| * or more contributor license agreements. See the NOTICE file |
| * distributed with this work for additional information |
| * regarding copyright ownership. The ASF licenses this file |
| * to you under the Apache License, Version 2.0 (the |
| * "License"); you may not use this file except in compliance |
| * with the License. You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, |
| * software distributed under the License is distributed on an |
| * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY |
| * KIND, either express or implied. See the License for the |
| * specific language governing permissions and limitations |
| * under the License. |
| */ |
| |
| package org.apache.ode.bpel.common; |
| |
| import org.apache.ode.utils.CollectionUtils; |
| import org.apache.ode.utils.msg.MessageBundle; |
| import org.apache.ode.utils.stl.CollectionsX; |
| import org.apache.ode.utils.stl.UnaryFunction; |
| |
| import java.io.Serializable; |
| import java.util.ArrayList; |
| import java.util.Collection; |
| import java.util.HashMap; |
| import java.util.Map; |
| import java.util.regex.Matcher; |
| import java.util.regex.Pattern; |
| |
| /** |
| * Base class for filters. |
| */ |
| public abstract class Filter<FKEY extends Enum> implements Serializable { |
| private static final long serialVersionUID = 9999; |
| |
| |
| /** Internationalization. */ |
| protected static final Messages __msgs = MessageBundle.getMessages(Messages.class); |
| |
| /** |
| * Pattern that matches anything like 'abcde < fgh' or 'ijklm =nop' using |
| * supported comparators |
| */ |
| private static final Pattern __comparatorPattern = |
| Pattern.compile("([^=<> ]*) *(<=|>=|<|>|=) *([^=<> ]*)"); |
| |
| protected Map<FKEY, Restriction<String>> _criteria = new HashMap<FKEY,Restriction<String>>(); |
| |
| public static class Restriction<V>{ |
| public final String originalKey; |
| public final String op; |
| public final V value; |
| |
| public Restriction(String originalKey, String op, V value) { |
| this.originalKey=originalKey; |
| this.op=op; |
| this.value = value; |
| } |
| } |
| |
| public void init(String filter) { |
| if (filter != null) { |
| Matcher expressionMatcher = __comparatorPattern.matcher(filter); |
| while (expressionMatcher.find()) { |
| String filterKey = expressionMatcher.group(1); |
| String op = expressionMatcher.group(2); |
| String value = expressionMatcher.group(3); |
| FKEY keyval; |
| try { |
| keyval = parseKey(filterKey.toUpperCase().replaceAll("-", "_")); |
| } catch (Exception ex) { |
| String errmsg = __msgs.msgUnrecognizedFilterKey(filterKey, getFilterKeysStr()); |
| throw new IllegalArgumentException(errmsg, ex); |
| } |
| |
| Restriction<String> restriction = new Restriction<String>(filterKey,op,value); |
| _criteria.put(keyval, restriction); |
| |
| process(keyval, restriction); |
| } |
| } |
| |
| } |
| |
| /** |
| * Get the data part of an "op date" string. |
| * @param ddf "op date" string |
| * @return date component |
| */ |
| public static String getDateWithoutOp(String ddf) { |
| if (ddf != null) { |
| if (ddf.startsWith("=")) { |
| return ddf.substring(1, ddf.length()); |
| } else if (ddf.startsWith("<=")) { |
| return ddf.substring(2, ddf.length()); |
| } else if (ddf.startsWith(">=")) { |
| return ddf.substring(2, ddf.length()); |
| } else if (ddf.startsWith("<")) { |
| return ddf.substring(1, ddf.length()); |
| } else if (ddf.startsWith(">")) { |
| return ddf.substring(1, ddf.length()); |
| } |
| } |
| return null; |
| |
| } |
| |
| /** |
| * Parse the string representation of a key into an |
| * enumeration value. |
| * @param keyVal string representation |
| * @return enumeration value |
| */ |
| protected abstract FKEY parseKey(String keyVal); |
| |
| /** |
| * Get the list of known (recognized) filter keys. |
| * @return recognized filter keys |
| */ |
| protected abstract FKEY[] getFilterKeys(); |
| |
| /** |
| * Perform additional parsing/processing. |
| * @param key filter key |
| * @param rest restriction |
| */ |
| protected abstract void process(FKEY key, Restriction<String> rest); |
| |
| private Collection<String> getFilterKeysStr() { |
| return CollectionsX.transform(new ArrayList<String>(), |
| CollectionUtils.makeCollection(ArrayList.class , getFilterKeys()), |
| new UnaryFunction<FKEY,String>() { |
| public String apply(FKEY x) { |
| return x.name(); |
| } |
| }); |
| |
| } |
| } |
| |