1 package org.codehaus.plexus.interpolation; 2 3 /* 4 * Copyright 2007 The Codehaus Foundation. 5 * 6 * Licensed under the Apache License, Version 2.0 (the "License"); 7 * you may not use this file except in compliance with the License. 8 * You may obtain a copy of the License at 9 * 10 * http://www.apache.org/licenses/LICENSE-2.0 11 * 12 * Unless required by applicable law or agreed to in writing, software 13 * distributed under the License is distributed on an "AS IS" BASIS, 14 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 15 * See the License for the specific language governing permissions and 16 * limitations under the License. 17 */ 18 19 import java.util.Map; 20 21 /** 22 * Wraps a Map, and looks up the whole expression as a single key, returning the 23 * value mapped to it. 24 */ 25 public class MapBasedValueSource extends AbstractValueSource { 26 27 private final Map values; 28 29 /** 30 * Construct a new value source to wrap the supplied map. 31 * @param values key,value of mapping. 32 */ 33 public MapBasedValueSource(Map values) { 34 super(false); 35 this.values = values; 36 } 37 38 /** 39 * Lookup the supplied expression as a key in the wrapped Map, and return 40 * its value. 41 */ 42 public Object getValue(String expression) { 43 return values == null ? null : values.get(expression); 44 } 45 }