com.intellij.lang.ant.config.execution.InputRequestHandler.java Source code

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Here is the source code for com.intellij.lang.ant.config.execution.InputRequestHandler.java

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/*
 * Copyright 2000-2009 JetBrains s.r.o.
 *
 * 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.intellij.lang.ant.config.execution;

import java.io.IOException;
import java.io.OutputStream;
import java.nio.charset.Charset;

import com.intellij.execution.process.OSProcessHandler;
import com.intellij.lang.ant.AntBundle;
import com.intellij.lang.ant.segments.SegmentReader;
import com.intellij.openapi.project.Project;
import com.intellij.openapi.ui.Messages;
import com.intellij.openapi.ui.ex.MessagesEx;

class InputRequestHandler {

    private InputRequestHandler() {
    }

    public static void processInput(Project project, SegmentReader reader, OSProcessHandler handler)
            throws IOException {
        String input = askUser(reader, project);
        Charset charset = handler.getCharset();
        OutputStream outputStream = handler.getProcessInput();
        sendInput(input, charset, outputStream);
    }

    private static void sendInput(String input, Charset charset, OutputStream outputStream) throws IOException {
        byte[] bytes = input.getBytes(charset.name());
        int length = bytes.length;
        byte[] packet = new byte[length + 4];
        System.arraycopy(bytes, 0, packet, 4, length);
        packet[0] = (byte) (length >> 24);
        packet[1] = (byte) (length >> 16);
        packet[2] = (byte) (length >> 8);
        packet[3] = (byte) length;
        outputStream.write(packet);
        outputStream.flush();
    }

    private static String askUser(SegmentReader reader, Project project) {
        String prompt = reader.readLimitedString();
        String defaultValue = reader.readLimitedString();
        String[] choices = reader.readStringArray();
        MessagesEx.BaseInputInfo question;
        if (choices.length == 0) {
            MessagesEx.InputInfo inputInfo = new MessagesEx.InputInfo(project);
            inputInfo.setDefaultValue(defaultValue);
            question = inputInfo;
        } else {
            MessagesEx.ChoiceInfo choiceInfo = new MessagesEx.ChoiceInfo(project);
            choiceInfo.setChoices(choices, defaultValue);
            question = choiceInfo;
        }
        question.setIcon(Messages.getQuestionIcon());
        question.setTitle(AntBundle.message("user.inout.request.ant.build.input.dialog.title"));
        question.setMessage(prompt);
        question.setIcon(Messages.getQuestionIcon());
        return question.forceUserInput();
    }
}