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      1 /*
      2  * Copyright (C) 2011 The Android Open Source Project
      3  *
      4  * Licensed under the Apache License, Version 2.0 (the "License");
      5  * you may not use this file except in compliance with the License.
      6  * You may obtain a copy of the License at
      7  *
      8  *      http://www.apache.org/licenses/LICENSE-2.0
      9  *
     10  * Unless required by applicable law or agreed to in writing, software
     11  * distributed under the License is distributed on an "AS IS" BASIS,
     12  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
     13  * See the License for the specific language governing permissions and
     14  * limitations under the License.
     15  */
     16 
     17 package vogar.commands;
     18 
     19 import java.io.File;
     20 import java.io.PrintStream;
     21 import java.util.ArrayList;
     22 import java.util.Arrays;
     23 import java.util.Collection;
     24 import java.util.Collections;
     25 import java.util.LinkedHashMap;
     26 import java.util.List;
     27 import java.util.Map;
     28 import vogar.Classpath;
     29 import vogar.Log;
     30 import vogar.Target;
     31 
     32 import static com.google.common.base.Preconditions.checkNotNull;
     33 
     34 /**
     35  * Builds a virtual machine command.
     36  */
     37 public final class VmCommandBuilder {
     38     private final Log log;
     39     private File temp;
     40     private boolean classpathViaProperty;
     41     private Classpath bootClasspath = new Classpath();
     42     private Classpath classpath = new Classpath();
     43     private File userDir;
     44     private Integer debugPort;
     45     private String mainClass;
     46     private PrintStream output;
     47     private int maxLength = -1;
     48     private List<String> vmCommand = Collections.singletonList("java");
     49     private List<String> vmArgs = new ArrayList<String>();
     50     private List<String> args = new ArrayList<String>();
     51     private File workingDirectory;
     52     private Map<String, String> env = new LinkedHashMap<String, String>();
     53 
     54     public VmCommandBuilder(Log log) {
     55         this.log = log;
     56     }
     57 
     58     public VmCommandBuilder vmCommand(List<String> vmCommand) {
     59         this.vmCommand = new ArrayList<String>(vmCommand);
     60         return this;
     61     }
     62 
     63     /**
     64      * Set the working directory of the target process.
     65      */
     66     public VmCommandBuilder workingDirectory(File workingDirectory) {
     67         this.workingDirectory = workingDirectory;
     68         return this;
     69     }
     70 
     71     public VmCommandBuilder temp(File temp) {
     72         this.temp = temp;
     73         return this;
     74     }
     75 
     76     public VmCommandBuilder bootClasspath(Classpath bootClasspath) {
     77         this.bootClasspath.addAll(bootClasspath);
     78         return this;
     79     }
     80 
     81     public VmCommandBuilder classpath(Classpath classpath) {
     82         this.classpath.addAll(classpath);
     83         return this;
     84     }
     85 
     86     public VmCommandBuilder classpathViaProperty(boolean classpathViaProperty) {
     87         this.classpathViaProperty = classpathViaProperty;
     88         return this;
     89     }
     90 
     91     /**
     92      * The user dir on the target. This directory might not exist on the
     93      * local disk.
     94      */
     95     public VmCommandBuilder userDir(File userDir) {
     96         this.userDir = userDir;
     97         return this;
     98     }
     99 
    100     /**
    101      * Add a setting for an environment variable in the target process.
    102      */
    103     public VmCommandBuilder env(String key, String value) {
    104         env.put(key, value);
    105         return this;
    106     }
    107 
    108     public VmCommandBuilder mainClass(String mainClass) {
    109         this.mainClass = mainClass;
    110         return this;
    111     }
    112 
    113     public VmCommandBuilder output(PrintStream output) {
    114         this.output = output;
    115         return this;
    116     }
    117 
    118     public VmCommandBuilder maxLength(int maxLength) {
    119         this.maxLength = maxLength;
    120         return this;
    121     }
    122 
    123     public VmCommandBuilder vmArgs(String... vmArgs) {
    124         return vmArgs(Arrays.asList(vmArgs));
    125     }
    126 
    127     public VmCommandBuilder vmArgs(Collection<String> vmArgs) {
    128         this.vmArgs.addAll(vmArgs);
    129         return this;
    130     }
    131 
    132     public VmCommandBuilder args(String... args) {
    133         return args(Arrays.asList(args));
    134     }
    135 
    136     public VmCommandBuilder args(Collection<String> args) {
    137         this.args.addAll(args);
    138         return this;
    139     }
    140 
    141     public Command build(Target target) {
    142         // Make sure that the main class to run has been specified.
    143         checkNotNull(mainClass, "mainClass may not be null");
    144 
    145         Target.ScriptBuilder builder = target.newScriptBuilder();
    146 
    147         if (workingDirectory != null) {
    148             builder.workingDirectory(workingDirectory);
    149         }
    150 
    151         builder.env(env);
    152 
    153         builder.tokens(vmCommand);
    154         if (classpathViaProperty) {
    155             builder.tokens("-Djava.class.path=" + classpath);
    156         } else {
    157             builder.tokens("-classpath", classpath.toString());
    158         }
    159         // Only output this if there's something on the boot classpath,
    160         // otherwise dalvikvm gets upset.
    161         if (!bootClasspath.isEmpty()) {
    162             builder.tokens("-Xbootclasspath/a:" + bootClasspath);
    163         }
    164         if (userDir != null) {
    165             builder.tokens("-Duser.dir=" + userDir);
    166         }
    167 
    168         if (temp != null) {
    169             builder.tokens("-Djava.io.tmpdir=" + temp);
    170         }
    171 
    172         builder.tokens(vmArgs);
    173         builder.tokens(mainClass);
    174         builder.tokens(args);
    175 
    176         return new Command.Builder(log)
    177                 .args(builder.commandLine())
    178                 .tee(output)
    179                 .maxLength(maxLength)
    180                 .build();
    181     }
    182 }
    183