com.google.code.configprocessor.ant.AntExpressionResolver Maven / Gradle / Ivy

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Generates configuration files modified according to a ruleset to prepare them for different environments

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/*
 * Copyright (C) 2009 Leandro de Oliveira Aparecido 
 *
 * 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 com.google.code.configprocessor.ant;

import java.util.*;

import org.apache.tools.ant.*;

import com.google.code.configprocessor.expression.*;

public class AntExpressionResolver implements ExpressionResolver {

	/**
	 * True if placeholders must be replaced.
	 */
	private boolean replacePlaceholders;

	/**
	 * Ant project.
	 */
	private Project project;

	/**
	 * Properties to use when resolving.
	 */
	private Properties specificProperties;

	public AntExpressionResolver(Project project, Properties specificProperties, boolean replacePlaceholders) {
		this.project = project;
		this.specificProperties = specificProperties == null ? new Properties() : specificProperties;
		this.replacePlaceholders = replacePlaceholders;
	}

	public String resolve(String value, boolean isPropertiesValue) {
		String resolvedValue;

		if (replacePlaceholders) {
			PropertyHelper ph = PropertyHelper.getPropertyHelper(project);
			// #issue 31
			Enumeration names = specificProperties.propertyNames();
			while (names.hasMoreElements()) {
				String name = (String) names.nextElement();
				ph.setUserProperty(null, name, specificProperties.getProperty(name));
			}
			resolvedValue = ph.replaceProperties(null, value, specificProperties);
		} else {
			resolvedValue = value;
		}

		return resolvedValue;
	}
}