Groovy example source code file (AstToTextHelper.java)

This example Groovy source code file (AstToTextHelper.java) is included in the DevDaily.com "Java Source Code Warehouse" project. The intent of this project is to help you "Learn Java by Example" ^TM.

Java - Groovy tags/keywords

asttotexthelper, asttotexthelper, reflection, string, string, stringbuilder, stringbuilder

The Groovy AstToTextHelper.java source code

/*
 * Copyright 2003-2010 the original author or authors.
 *
 * 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.codehaus.groovy.ast;

import java.lang.reflect.Modifier;

/**
 * Helper class for converting AST into text.
 * @author Hamlet D'Arcy
 */
public class AstToTextHelper {

    public static String getClassText(ClassNode node) {
        if (node == null) return "<unknown>";
        if (node.getName() == null) return "<unknown>";
        return node.getName();
    }

    public static String getParameterText(Parameter node) {
        if (node == null) return "<unknown>";

        String name = node.getName() == null ? "<unknown>" : node.getName();
        String type = getClassText(node.getType());
        if (node.getInitialExpression() != null) {
            return type + " " + name + " = " + node.getInitialExpression().getText();
        }
        return type + " " + name;
    }

    public static String getParametersText(Parameter[] parameters) {
        if (parameters == null) return "";
        if (parameters.length == 0) return "";
        StringBuilder result = new StringBuilder();
        int max = parameters.length;
        for (int x = 0; x < max; x++) {
            result.append(getParameterText(parameters[x]));
            if (x < (max - 1)) {
                result.append(", ");
            }
        }
        return result.toString();
    }

    public static String getThrowsClauseText(ClassNode[] exceptions) {
        if (exceptions == null) return "";
        if (exceptions.length == 0) return "";
        StringBuilder result = new StringBuilder("throws ");
        int max = exceptions.length;
        for (int x = 0; x < max; x++) {
            result.append(getClassText(exceptions[x]));
            if (x < (max - 1)) {
                result.append(", "); 
            }
        }
        return result.toString(); 
    }

    public static String getModifiersText(int modifiers) {
        StringBuilder result = new StringBuilder();
        if (Modifier.isPrivate(modifiers)) {
            result.append("private ");
        }
        if (Modifier.isProtected(modifiers)) {
            result.append("protected ");
        }
        if (Modifier.isPublic(modifiers)) {
            result.append("public ");
        }
        if (Modifier.isStatic(modifiers)) {
            result.append("static ");
        }
        if (Modifier.isAbstract(modifiers)) {
            result.append("abstract ");
        }
        if (Modifier.isFinal(modifiers)) {
            result.append("final ");
        }
        if (Modifier.isInterface(modifiers)) {
            result.append("interface ");
        }
        if (Modifier.isNative(modifiers)) {
            result.append("native ");
        }
        if (Modifier.isSynchronized(modifiers)) {
            result.append("synchronized ");
        }
        if (Modifier.isTransient(modifiers)) {
            result.append("transient ");
        }
        if (Modifier.isVolatile(modifiers)) {
            result.append("volatile ");
        }
        return result.toString().trim();
    }
}