1 | /*
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2 | * Search4j utility
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3 | * Command Line utility to search a system for java, launch a jar, or compare java versions
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4 | * base on launch4j
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5 | */
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6 |
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7 | #include "libsearch4j.h"
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8 |
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9 | void usage();
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10 |
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11 | enum Action {
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12 | Find,
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13 | Launch,
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14 | Compare
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15 | };
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16 |
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17 | enum JvmProperty {
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18 | JavaHome,
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19 | Version,
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20 | Executable
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21 | };
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22 |
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23 | string actionToString( Action a ) {
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24 | if ( a == Find )
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25 | return "Find";
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26 | else if ( a == Launch )
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27 | return "Launch";
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28 | else if ( a == Compare )
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29 | return "Compare";
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30 | return "Unknown";
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31 | }
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32 |
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33 | string jvmPropertyToString( JvmProperty jp ) {
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34 | if ( jp == JavaHome )
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35 | return "JavaHome";
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36 | else if ( jp == Version )
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37 | return "Version";
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38 | else if ( jp == Executable )
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39 | return "Executable";
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40 | return "Unknown";
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41 | }
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42 |
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43 |
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44 | int main ( int argc, char** argv ) {
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45 |
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46 | bool verbose = false;
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47 | string phint = "";
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48 | string hint = "";
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49 | bool use_minimum = false;
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50 | bool useJavaw = false;
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51 | Jvm minimum;
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52 | JvmProperty jvmProperty = JavaHome;
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53 | Action action = Find;
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54 | string arg1 = "";
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55 |
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56 | //parse commandline arguments
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57 | for (int i=1; i<argc; i++) {
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58 | if ( strcmp(argv[i], "--verbose") == 0 ) {
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59 | verbose = true;
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60 | } else if ( strcmp(argv[i], "--help") == 0 || strcmp(argv[i], "--usage") == 0 ) {
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61 | usage();
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62 | return 0;
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63 | } else if ( strcmp(argv[i], "-v") == 0 ) {
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64 | jvmProperty = Version;
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65 | } else if ( strcmp(argv[i], "-e") == 0 ) {
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66 | jvmProperty = Executable;
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67 | } else if ( strcmp(argv[i], "-c") == 0 ) {
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68 | action = Compare;
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69 | if ( i == argc-1 ) {
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70 | usage();
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71 | return -1;
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72 | } else {
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73 | arg1 = argv[++i];
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74 | }
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75 |
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76 | } else if ( strcmp(argv[i], "-m") == 0 ) {
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77 | if ( i == argc-1 ) {
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78 | usage();
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79 | return -1;
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80 | } else {
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81 | if ( !minimum.setVersionFromString( argv[++i] ) ) {
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82 | usage();
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83 | return 0;
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84 | }
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85 | use_minimum = true;
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86 | }
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87 |
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88 | } else if ( strcmp(argv[i], "-l") == 0 ) {
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89 | if ( i == argc-1 ) {
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90 | usage();
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91 | return -1;
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92 | } else {
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93 | action = Launch;
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94 | arg1 = argv[++i];
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95 | }
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96 |
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97 | } else if ( strcmp(argv[i], "-p") == 0 ) {
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98 | if ( i == argc-1 ) {
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99 | usage();
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100 | return -1;
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101 | } else {
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102 | phint = argv[++i];
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103 | }
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104 |
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105 | } else if ( strcmp(argv[i], "-h") == 0 ) {
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106 | if ( i == argc-1 ) {
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107 | usage();
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108 | return -1;
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109 | } else {
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110 | hint = argv[++i];
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111 | }
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112 |
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113 | #ifdef WINDOWS
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114 | } else if ( strcmp(argv[i], "-w") == 0 ) {
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115 | useJavaw = true;
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116 | #endif
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117 |
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118 | } else {
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119 | cout << "unknown option: " << argv[i] << endl;
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120 | return -1;
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121 | }
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122 | }
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123 |
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124 | //summarise commandline arguments
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125 | if ( verbose ) {
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126 | cout << "Action: " << actionToString( action ) << endl;
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127 | }
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128 |
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129 | //find java
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130 | Jvm foundJvm;
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131 | bool found = find( foundJvm, use_minimum, minimum, phint, hint, verbose );
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132 |
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133 | //check if it was found
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134 | if ( found ) {
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135 | if ( verbose ) cout << "Found JVM at '" << foundJvm.getJavaHome() << "'" << endl;
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136 | } else {
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137 | //not found - exit with -1
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138 | if ( verbose ) cout << "JVM not found" << endl;
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139 | return -1;
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140 | }
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141 |
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142 |
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143 | //Find Action
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144 | //---------------
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145 | if ( action == Find ) {
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146 |
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147 | if ( verbose ) cout << "Property to print: " << jvmPropertyToString( jvmProperty ) << endl;
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148 |
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149 | //found - print out info about it
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150 | if ( jvmProperty == JavaHome ) {
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151 | cout << foundJvm.getJavaHome() << endl;
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152 | } else if ( jvmProperty == Version ) {
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153 | cout << foundJvm.getVersion() << endl;
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154 | } else if ( jvmProperty == Executable ) {
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155 | #ifdef WINDOWS
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156 | if ( useJavaw ) {
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157 | cout << foundJvm.getWinExecutable() << endl;
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158 | } else {
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159 | cout << foundJvm.getExecutable() << endl;
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160 | }
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161 | #else
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162 | cout << foundJvm.getExecutable() << endl;
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163 | #endif
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164 | } else {
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165 | return -1; //should never happen
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166 | }
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167 |
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168 |
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169 | //Compare Action
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170 | //---------------
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171 | } else if ( action == Compare ) {
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172 |
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173 | if ( verbose ) cout << "Compare to java at: " << arg1 << endl;
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174 |
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175 | //load a dummy jvm for comparison
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176 | Jvm givenJvm;
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177 | if ( !givenJvm.setVersionFromString(arg1) ) {
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178 | if ( verbose ) cout << "Could not parse that version string" << endl;
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179 | return -1;
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180 | }
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181 |
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182 | //compare
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183 | cout << foundJvm.compare( givenJvm );
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184 | return 0;
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185 |
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186 |
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187 | //Launch Action
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188 | //---------------
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189 | } else if ( action == Launch ) {
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190 |
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191 | if ( verbose ) cout << "Jar to launch: " << arg1 << endl;
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192 |
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193 | string cmd = "\"", output = "";
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194 | #ifdef WINDOWS
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195 | if ( useJavaw ) {
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196 | cmd.append( foundJvm.getWinExecutable() );
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197 | } else {
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198 | cmd.append( foundJvm.getExecutable() );
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199 | }
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200 | #else
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201 | cmd.append( foundJvm.getExecutable() );
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202 | #endif
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203 | cmd.append( "\" -jar " );
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204 | cmd.append( arg1 );
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205 |
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206 | process( cmd, true );
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207 |
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208 | }
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209 |
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210 | return 0;
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211 | }
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212 |
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213 | void usage() {
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214 |
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215 | cout
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216 | << "-----------------" << endl
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217 | << " search4j: usage" << endl
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218 | << "-----------------" << endl
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219 | << "Three usage methods: find, compare and launch" << endl
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220 | << endl
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221 | << "find: find java and print out information about it" << endl
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222 | << endl
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223 | << " search4j [-v|-e]" << endl
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224 | << " eg: search4j -e" << endl
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225 | << endl
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226 | << " by default, print JAVA_HOME. E.g., C:\\Program Files\\jre1.5.0_15, or" << endl
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227 | << " if -v is specified, print the java version string. E.g. 1.5.0_15, or" << endl
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228 | << " if -e is specified, print the path the to the java executable. E.g. C:\\Program Files\\jre1.5.0_15\\bin\\java.exe" << endl
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229 | << endl
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230 | << "compare: compare the found java with the given java version string" << endl
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231 | << endl
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232 | << " search4j -c VERSION_STRING" << endl
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233 | << " eg: search4j -c VERSION_STRING" << endl
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234 | << endl
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235 | << " print -1 if found java is older" << endl
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236 | << " print 0 if found java is same" << endl
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237 | << " print 1 if found java is newer" << endl
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238 | << endl
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239 | << "launch: launch the given executable jar with the found java" << endl
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240 | << endl
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241 | << " search4j -l EXECUTABLE_JAR [-m VERSION_STRING]" << endl
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242 | << " eg: search4j -l greenstone3.jar" << endl
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243 | << endl
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244 | << " specify the location of the jar relative to the current directory" << endl
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245 | << endl
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246 | << "Global Options:" << endl
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247 | << " -m VERSION_STRING: (minimum) find a java of the given version or newer, or fail" << endl
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248 | << " -p LOCATION: (priority hint) first look for java in LOCATION (treated as a JAVA_HOME)" << endl
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249 | << " -h LOCATION: (hint) as a last resort look for java in LOCATION (treated as a JAVA_HOME)" << endl
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250 | << " -w: (windows) find and/or use the javaw.exe executable instead of java.exe (in windows only)" << endl
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251 | << " --verbose : have search4j print out information about what its doing" << endl
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252 | << " --help : display this usage screen" << endl
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253 | << endl
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254 | ;
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255 | }
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