/** * MVEL 2.0 * Copyright (C) 2007 The Codehaus * Mike Brock, Dhanji Prasanna, John Graham, Mark Proctor * * Licensed 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.mvel2.integration.impl; import org.mvel2.integration.VariableResolver; import org.mvel2.integration.VariableResolverFactory; public class ItemResolverFactory extends BaseVariableResolverFactory { private final ItemResolver resolver; public ItemResolverFactory(ItemResolver resolver, VariableResolverFactory nextFactory) { this.resolver = resolver; this.nextFactory = nextFactory; } public VariableResolver createVariable(String name, Object value) { if (isTarget(name)) { resolver.setValue(value); return resolver; } else { return nextFactory.createVariable(name, value); } } public VariableResolver createVariable(String name, Object value, Class<?> type) { if (isTarget(name)) { throw new RuntimeException("variable already defined in scope: " + name); } else { return nextFactory.createVariable(name, value); } } public VariableResolver getVariableResolver(String name) { return isTarget(name) ? resolver : nextFactory.getVariableResolver(name); } public boolean isTarget(String name) { return resolver.getName().equals(name); } public boolean isResolveable(String name) { return resolver.getName().equals(name) || (nextFactory != null && nextFactory.isResolveable(name)); } public static class ItemResolver implements VariableResolver { private final String name; private Class type = Object.class; public Object value; public ItemResolver(String name, Class type) { this.name = name; this.type = type; } public ItemResolver(String name) { this.name = name; } public String getName() { return name; } public Class getType() { return type; } public void setStaticType(Class type) { this.type = type; } public int getFlags() { return 0; } public Object getValue() { return value; } public void setValue(Object value) { this.value = value; } } }